Bacterial infection,insufficient angiogenesis,and oxidative damage are generally regarded as key issues that impede wound healing,making it necessary to prepare new biomaterials to simultaneously address these problem...Bacterial infection,insufficient angiogenesis,and oxidative damage are generally regarded as key issues that impede wound healing,making it necessary to prepare new biomaterials to simultaneously address these problems.In this work,monodispersed CeO_(2)@CuS nanocomposites(NCs)were successfully prepared with tannin(TA)as the reductant and linker.Due to abundant oxygen vacancies in CeO_(2)and the polyphenolic structure of TA,the TA-CeO_(2)@CuS NCs exhibited a remarkable antioxidant ability to scavenge excessive reactive oxygen species(ROS),which would likely induce serious inflammation.In addition,the TA-CeO_(2)@CuS NCs demonstrated excellent antibacterial capability with near-infrared ray(NIR)irradiation,and the released copper ions could promote the regeneration of blood vessels.These synergistic effects indicated that the synthesized TA-CeO_(2)@CuS NCs could serve as a promising biomaterial for multimodal wound therapy.展开更多
PVDF-based nanocomposites have gained significant focus in capacitors for their excellent dielectric strength, its multi-scale structural inhomogeneity is the bottleneck for improving the energy storage performance. H...PVDF-based nanocomposites have gained significant focus in capacitors for their excellent dielectric strength, its multi-scale structural inhomogeneity is the bottleneck for improving the energy storage performance. Here, the composite components are optimized by the matrix modification,BST(Ba_(0.6)Sr_(0.4)TiO_(3)) ceramic fibrillation and surface coating. A series of PVDF/polymethyl methacrylate/lysozyme@BST nanofibers with continuous gradient distribution(PF-M/m BST nf-g) are prepared by the concentration gradient-biaxial high-speed electrospinning. The finite element simulation and experiment results indicate that the continuous gradient structure is favorable for the microstructure and inhomogeneity of the electric field distribution, significantly increasing the breakdown strength(Eb) and the permittivity(εr), as well as effectively suppressing the interfacial injected charge and leakage current. As a result, the energy storage density(Ue) of 23.1 J/cm^(3)at 600 MV/m with the charge-discharge efficiency(η) of 71% is achieved compared to PF-M(5.6 J/cm^(3)@350 MV/m, 65%). The exciting energy storage performance based on the well-designed PF-M/m BST nf-g provides important information for the development and application of polymer nanocomposite dielectrics.展开更多
In recent years,smart materials have emerged as a groundbreaking innovation in the field of water filtration,offering sustainable,efficient,and environmentally friendly solutions to address the growing global water cr...In recent years,smart materials have emerged as a groundbreaking innovation in the field of water filtration,offering sustainable,efficient,and environmentally friendly solutions to address the growing global water crisis.This review explores the latest advancements in the application of smart materials—including biomaterials,nanocomposites,and stimuli-responsive polymers—specifically for water treatment.It examines their effectiveness in detecting and removing various types of pollutants,including organic contaminants,heavy metals,and microbial infections,while adapting to dynamic environmental conditions such as fluctuations in temperature,pH,and pressure.The review highlights the remarkable versatility of these materials,emphasizing their multifunctionality,which allows them to address a wide range of water quality issues with high efficiency and low environmental impact.Moreover,it explores the potential of smart materials to overcome significant challenges in water purification,such as the need for real-time pollutant detection and targeted removal processes.The research also discusses the scalability and future development of these materials,considering their cost-effectiveness and potential for large-scale application.By aligning with the principles of sustainable development,smart materials represent a promising direction for ensuring global water security,offering both innovative solutions for current water pollution issues and long-term benefits for the environment and public health.展开更多
Metal-organic frameworks(MOFs)have attracted significant interest as self-templates and precursors for the synthesis of carbon-based composites aimed at electromagnetic wave(EMW)absorption.However,the utilization of h...Metal-organic frameworks(MOFs)have attracted significant interest as self-templates and precursors for the synthesis of carbon-based composites aimed at electromagnetic wave(EMW)absorption.However,the utilization of high-temperature treatments has introduced uncertainties regarding the compositions and microstructures of resulting derivatives.Additionally,complete carbonization has led to diminished yields of the produced carbon composites,significantly limiting their practical applications.Consequently,the exploration of pristine MOF-based EMW absorbers presents an intriguing yet challenging endeavor,primarily due to inherently low electrical conductivity.In this study,we showcase the utilization of structurally robust Zr-MOFs as scaffolds to build highly conductive Zr-MOF/PPy composites via an inner-outer dual-modification approach,which involves the production of conducting polypyrrole(PPy)both within the confined nanoporous channels and the external surface of Zr-MOFs via post-synthetic modification.The interconnection of confined PPy and surface-lined PPy together leads to a consecutive and extensive conducting network to the maximum extent.This therefore entails outstanding conductivity up to~14.3 S cm^(-1) in Zr-MOF/PPy composites,which is approximately 1-2 orders of magnitude higher than that for conductive MOF nanocomposites constructed from either inner or outer modification.Benefiting from the strong and tunable conduction loss,as well as the induced dielectric polarization originated from the porous structures and MOF-polymer interfaces,Zr-MOF/PPy exhibits excellent microwave attenuation capabilities and a tunable absorption frequency range.Specifically,with only 15 wt.%loading,the minimum reflection loss(RLmin)can reach up to-67.4 dB,accompanied by an effective absorption bandwidth(EAB)extending to 6.74 GHz.Furthermore,the microwave absorption characteristics can be tailored from the C-band to the Ku-band by adjusting the loading of PPy.This work provides valuable insights into the fabrication of conductive MOF composites by presenting a straightforward pathway to enhance and reg-ulate electrical conduction in MOF-based nanocomposites,thus paving a way to facilely fabricate pristine MOF-based microwave absorbers.展开更多
The preparation of electromagnetic(EM)wave absorption materials provided with the characteristics of thin matching thickness,broad bandwidth,and mighty absorption intensity is an efficient solution to current EM pollu...The preparation of electromagnetic(EM)wave absorption materials provided with the characteristics of thin matching thickness,broad bandwidth,and mighty absorption intensity is an efficient solution to current EM pollution.Herein,Graphene nanosheets(GN)were firstly fabricated via a facile high-energy ball milling method,subsequently high-purity 1T-MoS_(2) petals were uniformly anchored on the surface of GN to prepare 1T-MoS_(2)@GN nanocomposites.Plentiful multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by GN and 1T-MoS_(2),copious polarization loss consisting of interfacial polarization loss and dipolar polarization loss severally derived from multitudinous heterointerfaces and profuse electric dipoles in 1T-MoS_(2)@GN,and mighty conduction loss originated from plentiful induced current in 1T-MoS_(2)@GN generated via the migration of massive electrons,all of which endowed 1T-MoS_(2)@GN nanocomposites with exceptional EM wave absorption performances.The minimum reflection loss(RLmin)of 1T-MoS_(2)@GN reached–50.14 dB at a thickness of only 2.10 mm,and the effective absorption bandwidth(EAB)was up to 6.72 GHz at an ultra-thin matching thickness of 1.84 mm.Moreover,the radar scattering cross section(RCS)reduction value of 36.18 dB m2 at 0°could be achieved as well,which ulteriorly validated the tremendous potential of 1T-MoS_(2)@GN nanocomposites in practical applications.展开更多
Concerns about air quality in dental clinics where aerosol generation during procedures poses significant health risks,have prompted investigations on advanced disinfection technologies.This editorial describes the st...Concerns about air quality in dental clinics where aerosol generation during procedures poses significant health risks,have prompted investigations on advanced disinfection technologies.This editorial describes the strengths and limitations of ventilation and aerosol control measures in dental offices,especially with respect to the use of graphene nanocomposites.The potential of graphene nanocomposites as an innovative solution to aerosol-associated health risks is examined in this review due to the unique properties of graphene(e.g.,high con-ductivity,mechanical strength,and antimicrobial activity).These properties have produced promising results in various fields,but the application of graphene in dentistry remains unexplored.The recent study by Ju et al which was published in World Journal of Clinical Cases evaluated the effectiveness of graphene-based air disinfection systems in dental clinics.The study demonstrated that graphene-based disinfection techniques produced significant reductions in suspended particulate matter and bacterial colony counts,when co-mpared with traditional methods.Despite these positive results,challenges such as material saturation,frequency of filter replacement,and associated costs must be addressed before widespread adoption of graphene-based disinfection techniques in clinical practice.Therefore,there is need for further research on material structure optimization,long-term safety evaluations,and broader clinical applications,in order to maximize their positive impact on public health.展开更多
This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters...This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters,graphene nanocom-posites substantially improved air quality and reduced microbial contamination.This manuscript highlights the innovative application of graphene materials,emphasizing their potential to enhance dental clinic environments by minimizing secondary pollution.On the basis of the unique antimicrobial properties of gra-phene and the original study’s rigorous methodology,we recommend using gra-phene nanocomposites in clinical settings to control airborne infections.展开更多
Graphene nanoplatelets(GNPs)have attracted tremendous interest due to their unique properties and bonding capabilities.This study focuses on the effect of GNP dispersion on the mechanical,thermal,and morphological beh...Graphene nanoplatelets(GNPs)have attracted tremendous interest due to their unique properties and bonding capabilities.This study focuses on the effect of GNP dispersion on the mechanical,thermal,and morphological behavior of GNP/epoxy nanocomposites.This study aims to understand how the dispersion of GNPs affects the properties of epoxy nanocomposite and to identify the best dispersion approach for improving mechanical performance.A solvent mixing technique that includes mechanical stirring and ultrasonication was used for producing the nanocomposites.Fourier transform infrared spectroscopy was used to investigate the interaction between GNPs and the epoxy matrix.The measurements of density and moisture content were used to confirm that GNPs were successfully incorporated into the nanocomposite.The findings showed that GNPs are successfully dispersed in the epoxy matrix by combining mechanical stirring and ultrasonication in a single step,producing well-dispersed nanocomposites with improved mechanical properties.Particularly,the nanocomposites at a low GNP loading of 0.1 wt%,demonstrate superior mechanical strength,as shown by increased tensile properties,including improved Young's modulus(1.86 GPa),strength(57.31 MPa),and elongation at break(4.98).The nanocomposite with 0.25 wt%GNP loading performs better,according to the viscoelastic analysis and flexural properties(113.18 MPa).Except for the nanocomposite with a 0.5 wt%GNP loading,which has a higher thermal breakdown temperature,the thermal characteristics do not significantly alter.The effective dispersion of GNPs in the epoxy matrix and low agglomeration is confirmed by the morphological characterization.The findings help with filler selection and identifying the best dispersion approach,which improves mechanical performance.The effective integration of GNPs and their interaction with the epoxy matrix provides the doorway for additional investigation and the development of sophisticated nanocomposites.In fields like aerospace,automotive,and electronics where higher mechanical performance and functionality are required,GNPs'improved mechanical properties and successful dispersion present exciting potential.展开更多
Nanotechnology is transforming the textile industry by embedding UV-blocking and antimicrobial agents into fabric fibres at the molecular level. This study explores the development of biocomposites and nanocomposite m...Nanotechnology is transforming the textile industry by embedding UV-blocking and antimicrobial agents into fabric fibres at the molecular level. This study explores the development of biocomposites and nanocomposite materials for UV protection and microbial resistance in clothing. Nanoscale UV-blocking agents enhance the protection of textiles against harmful ultraviolet radiation. Recent studies on composites such as ZnO/carboxymethyl chitosan, polyacrylonitrile with UV absorbers and TiO2 nanoparticles, and lignin-TiO composites have shown significant improvements in UV protection and some antibacterial activity. Techniques such as electrospinning, hydrothermal synthesis, and natural fibre welding were used to create these composites, focusing on ZnO and TiO2 nanoparticles for dual functionality. Research on nanoscale UV-blocking agents could revolutionise sun protection in clothing and offer better safety against ultraviolet radiation. Multifunctional composites with UV-blocking and antibacterial properties could advance the use of protective clothing in various industries and outdoor activities. Emphasising natural fibres and sustainable materials aligns with the global trend towards eco-friendly solutions, leading to more environmentally friendly products. This literature review aims to comprehensively review and analyze current research on UV protective knit fabrics using nanotechnology, nanocomposites, and biocomposites. It seeks to identify research gaps, evaluate different approaches, and provide insights for future developments in this field.展开更多
Lubricating greases are widely used in mechanical engineering,especially in rolling bearing.Carbon-based materials show promise as lubricant additive for formulating high-performance grease.However,the enhancement of ...Lubricating greases are widely used in mechanical engineering,especially in rolling bearing.Carbon-based materials show promise as lubricant additive for formulating high-performance grease.However,the enhancement of lubrication performance of carbon-based materials limits by the simple lubricating mechanism.This work demonstrates that nanocomposite of metal-organic frameworks(MOFs)-derived carbon as a grease additive can improve the tribological properties of bentone grease.HKUST-1 was synthesized by a solvent method and converted into HKUST-1 derived carbon(HDC) via one-step pyrolysis sacrifice template method.After pyrolysis of HKUST-1 at 350℃,Cu_(2+)was reduced to zero-valence copper.With increasing pyrolysis temperature from 350 to 950℃,both the particle size of copper in HDC and the degree of graphite defect increased gradually.Types of HDCs as base grease additives significantly improved friction-reduction and anti-wear performance of bentone grease.Compared with the base grease,HDC-950 ℃ with the amount of 2 wt% addition reduced friction coefficient and wear volume loss by 35.5% and 97.0%,respectively.The superior tribological performance of the HDC-950℃is attributed to the synergistic effect of carbon and copper nanoparticles to induce tribochemical reaction,which form a stable protective film on the friction surfaces.This study highlights the potential of MOFs-derived carbon for developing high-performance grease additives.展开更多
The characte rization of MgFe_(2)O_(4)@CeO_(2) superparamagnetic nanocomposites was tho roughly investigated using powder X-ray diffraction(XRD),a vibrating sample magnetometer(VSM),scanning electron microscopy(SEM),d...The characte rization of MgFe_(2)O_(4)@CeO_(2) superparamagnetic nanocomposites was tho roughly investigated using powder X-ray diffraction(XRD),a vibrating sample magnetometer(VSM),scanning electron microscopy(SEM),dispersive X-ray analysis(EDX),elemental mapping(MAP),transmission electron microscopy(TEM),Brunauer-Emmett-Teller(BET) and UV-Vis diffuse reflectance spectroscopy(DRS)analyses.The photocatalytic activity of the synthesized samples was evaluated as a novel magnetic nanocatalyst for degrading Congo red(CR) dye in an aqueous solution under visible light at room conditions.The results demonstrate that the efficiency of photocatalytic degradation is higher than that of absorbance and photolysis.The degradation efficiency of photodegradation is 93% within 49% of total organic carbon removal performance.The prepared MgFe_(2)O_(4)@CeO_(2) magnetic nanocomposites(MNCs)can be easily recovered and recycled for five repeated cycles,demonstrating potential extensive efficiency in magnetic nanocomposites in wastewater and water treatment.The nanoscale morphology of MgFe_(2)O_(4)@CeO_(2) MNCs was characterized as spherical,with a size range of 35-40 nm,utilizing SEM and TEM techniques.The saturation magnetization(M_(s)) of the resulting nanocomposites was analyzed by VSM,revealing a value of 3.58 emu/g.Furthermore,the surface area was determined to be 27.194 m^(2)/g using BET analysis,and the band gap was identified as 2.85 eV through DRS analysis.展开更多
The food industry prioritizes food safety throughout the entire production process.This involves closely monitoring and evaluating all potential sources of biological or chemical contamination,starting from entering r...The food industry prioritizes food safety throughout the entire production process.This involves closely monitoring and evaluating all potential sources of biological or chemical contamination,starting from entering raw materials into the production chain and continuing to the final product.Biofilms on food surfaces or containers can harbor dangerous pathogens,such as Listeria monocytogenes.Therefore,it is essential to continuously manage microbial contamination on food contact surfaces to prevent foodborne infections.Recently,there has been increasing interest in using nanomaterials as surface coatings with antimicrobial properties in the food industry,especially since traditional disinfectants or antibiotics may contribute to developing resistance.However,the use of antibiofilm materials for long-term food storage remains underexplored,and there is a notable lack of focused reviews on nanomaterialbased antibiofilm coatings specifically for long-term food preservation.This review aims to consolidate recently reported nanoparticle-based antibiofilm food packaging materials.We discuss the effectiveness of various metal and metal oxide nanoparticles and biopolymer nanocomposites in combating biofilms.Additionally,we highlight the growing importance of biodegradable nanocomposite materials for antibiofilm food packaging.Furthermore,we explore the mechanisms of action,processing methods,and safety aspects of these nanomaterials being developed for food packaging applications.展开更多
The oxygen evolution reaction(OER),a critical half-reaction in water electrolysis,has garnered significant attention.However,sluggish OER kinetics has emerged as a major impediment to efficient electrochemical energy c...The oxygen evolution reaction(OER),a critical half-reaction in water electrolysis,has garnered significant attention.However,sluggish OER kinetics has emerged as a major impediment to efficient electrochemical energy conversion.There is an urgent need to design novel electrocatalysts with optimized OER kinetics and enhanced intrinsic activity to improve overall OER performance.Herein,one-dimensional(1D)nanocomposites with high electrocatalytic activity were developed through the deposition of CoFePBA nanocubes onto the surface of MnO_(2) nanowires.The electronic structure of the nanocomposite surface was modified,and the synergistic effects between transition metals were leveraged to enhance catalytic activity through the deposition of Prussian blue analog(PBA)nanocubes on manganese dioxide nanowires.Specifically,CoFePBA featured an open crystal structure that offiered numerous electrochemical active sites and efficient charge transfer pathways.Additionally,the synergistic interactions between Co and Fe significantly reduced the OER overpotential.Additionally,the 1D rigid MnO_(2) acted as protective armor,ensuring the stability of active sites within CoFePBA during the OER.The synthesized MnO_(2)@CoFePBA achieved an overpotential of 1.614 V at 10 mA/cm^(2) and a small Tafel slope of 94 mV/dec and demonstrated stable performance for over 200 h.This work offers new insights into the rational design of various PBA-based nanocomposites with high activity and stability.展开更多
Hollow engineering plays a crucial role in enhancing interfacial polarization,which is an essential factor in microwave absorption.Herein,an in-situ growth approach was adopted to successively coating C layer and WS_(...Hollow engineering plays a crucial role in enhancing interfacial polarization,which is an essential factor in microwave absorption.Herein,an in-situ growth approach was adopted to successively coating C layer and WS_(2) nanosheets on the surface SiO_(2) nanosphere.The obtained results suggested that the formed SiO_(2)@Void@C@WS_(2) multi-component nanocomposites(MCNCs)reveal a representative flower-like yolk-shell structure,which were manufactured massively through a simple channel.Additionally,the obtained SiO_(2)@Void@C@WS_(2) MCNCs presented a more and more obvious yolk-shell structure and reduced WS_(2) content with decreasing the addition of SiO_(2)@C or tungsten and sulfur sources.Because of their distinc-tive structures and remarkable cooperative effects,the SiO_(2)@Void@C@WS_(2) displayed excellent microwave absorption performances.Through the majorization of hollow structure and WS_(2),improved properties of SiO_(2)@Void@C@WS_(2) MCNCs could be acquired owing to their boosted polarization and conductive loss capabilities.Amongst,the resulting SiO_(2)@Void@C@WS_(2) MCNCs exhibited the effective absorption band and minimum reflection loss values of 5.40 GHz and−45.50 dB with matching thicknesses of 1.78 and 1.55 mm,respectively.Therefore,our findings employed hollow engineering and optimization strategies for components to design and fabricate the yolk-shell structure flower-like MCNCs,which acted as highly efficient wide-band microwave absorbing materials.展开更多
The effective detection of trace methyl mercaptan(CH_(3)SH)with low power consumption is crucial for assessing air quality and facilitating non-invasive diagnosis of diseases such as periodontitis.Herein,we synthesize...The effective detection of trace methyl mercaptan(CH_(3)SH)with low power consumption is crucial for assessing air quality and facilitating non-invasive diagnosis of diseases such as periodontitis.Herein,we synthesized a ternary CeO_(2)-ZnO-Ag nanocomposite by a simple sol-gel one-step method,which shows the capability of monitoring ppb-level CH_(3)SH under room temperature.The incorporation of Ag significantly reduces the particle size and increases the ratio of Ce^(3+)as well as oxygen vacancy.Furthermore,Ag nanoparticles improve light utilization efficiency in CeO_(2)-ZnO composites in favor of the separation of photo-generated charge carriers.The sensor based on the nanocomposites with 2 mol%Ag exhibits an exceptional response of 1.21 towards 50 ppb CH3SH at room temperature under photoassisted excitation(395 nm).Moreover,it shows a stable detection even in an environment with 57.6% humidity and high selectivity towards CH_(3)SH gas.The gas sensing mechanism study indicates that the enhancement in perfo rmance is prima rily attributed to an increased number of oxygen vacancies and the spillover effect of Ag,ultimately leading to an augmented reaction rate of CH_(3)SH on the surface of the sensing material.This work demonstrates that the optimized CeO_(2)-ZnO-Ag nanocomposites hold great promise for highly selective and sensitive detection of trace CH_(3)SH gas under specific humidity conditions.展开更多
The lipophilic hydroxyapatite(HA)nanorods were firstly synthesized by the solvothermal method using calcium oleate as the precursor.As-synthesized HA nanorods had an average aspect ratio of 11.4 with 18.4 wt%oleic aci...The lipophilic hydroxyapatite(HA)nanorods were firstly synthesized by the solvothermal method using calcium oleate as the precursor.As-synthesized HA nanorods had an average aspect ratio of 11.4 with 18.4 wt%oleic acid attached on the surface.Then the hydroxyapatite/polylactic acid(HA/PLA)nanocomposites were prepared by dispersing the HA nanorods in PLA using dichloromethane(CH_(2)Cl_(2))as the volatile solvent.The influence of the HA content on the properties of the HA/PLA nanocomposites was investigated.It is found that the nanocomposite with 2 wt%HA exhibits the optimal mechanical properties.The tensile strength and elongation at break are 59.4 MPa and 18.19%,respectively.The values are enhanced by 13%and 184.2%compared with that of the pure PLA.The higher HA addition results in the decrease in the mechanical properties due to the aggregation of HA nanorods.The thermal properties of the HA/PLA nanocomposites were also examined.It is found that the thermal stability and crystallization transition temperature are decreased while the glass transition temperature and melting temperature remain basically unchanged with the increasing HA content up to 10 wt%.展开更多
Over the past several decades,the integration of IONs into EP emerged as an effective method for enhancing its mechanical properties.Nevertheless,challenges remain,especially with u-IONs,where the interfacial strength...Over the past several decades,the integration of IONs into EP emerged as an effective method for enhancing its mechanical properties.Nevertheless,challenges remain,especially with u-IONs,where the interfacial strength with EP is suboptimal,resulting in aggregation within the EP matrix and a subsequent deterioration in the mechanical performance of u-ION/EP nanocomposites.In this comprehensive review,we explored advanced chemical modification techniques tailored for IONs incorporated into EP,providing a detailed examination of the mechanical characteristics of surface cm-ION/EP nanocomposites.This review investigates various chemical modification methods and their distinct impacts on the mechanical attributes of the resulting EP nanocomposites.Special emphasis is given to addressing the persistent challenges of inadequate interfacial strength and aggregation.Furthermore,this article examines prospective surface modification approaches for inorganic oxide nanoparticles,offering a visionary outlook on methods to improve the mechanical performance of EP in future.展开更多
In the article“Recent Advancements in Nanocomposites-Based Antibiofilm Food Packaging”by Bandana Padhan et al.(Journal of Polymer Materials,2025,Vol.42,No.2,pp.411–433.doi:10.32604/jpm.2024.059156),originally publi...In the article“Recent Advancements in Nanocomposites-Based Antibiofilm Food Packaging”by Bandana Padhan et al.(Journal of Polymer Materials,2025,Vol.42,No.2,pp.411–433.doi:10.32604/jpm.2024.059156),originally published online on December 9,2024,and formally included in Vol.42,No.2(published on July 11,2025).展开更多
Renewable 2,5-furandicarboxylic acid-based polyesters are one of the most promising materials for achieving plastic replacement in the age of energy and environmental crisis.However,their properties still cannot compe...Renewable 2,5-furandicarboxylic acid-based polyesters are one of the most promising materials for achieving plastic replacement in the age of energy and environmental crisis.However,their properties still cannot compete with those of petrochemical-based plastics,owing to insufficient molecular and/or microstructure designs.Herein,we utilize the Ti_(3)C_(2)T_(x)-based MXene nanosheets for decorating carbon nanotube(CNT)and obtaining the structurally stable and highly dispersed dendritic heterostructured MXene@CNT,that can act as multi-roles,i.e.,polycondensation catalyst,crystal nucleator,and interface enhancer of polyester.The biobased MXene@CNT/polybutylene furandicarboxylate(PBF)(denoted as MCP)nanocomposites are synthesized by the strategy of“in situ catalytic polymerization and hot-pressing”.Benefiting from the multi-scale interactions(i.e.,covalent bonds,hydrogen bonds,and physical interlocks)in hybrid structure,the MCP presents exceptional mechanical strength(≈101 MPa),stiffness(≈3.1 GPa),toughness(≈130 MJ m^(-3)),and barrier properties(e.g.,O_(2)0.0187 barrer,CO_(2)0.0264 barrer,and H2O 1.57×10^(-14) g cm cm^(-2) s Pa)that are higher than most reported bio-based materials and engineering plastics.Moreover,it also displays satisfactory multifunctionality with high reprocessability(90%strength retention after 5 recycling),UV resistance(blocking 85%UVA rays),and solvent-resistant properties.As a state-of-art high-performance and multifunctional material,the novel bio-based MCP nanocomposite offers a more sustainable alternative to petrochemical-based plastics in packaging and engineering material fields.More importantly,our catalysis-interfacial strengthening integration strategy opens a door for designing and constructing high-performance bio-based polyester materials in future.展开更多
Sol-gel method was employed to combine Al and iron-oxide to form nanocomposites （nano-Al/xero-Fe2O3 and micro-Al/xero-Fe2O3）. SEM, EDS and XRD analyses were used to characterize the nanocomposites and the results in...Sol-gel method was employed to combine Al and iron-oxide to form nanocomposites （nano-Al/xero-Fe2O3 and micro-Al/xero-Fe2O3）. SEM, EDS and XRD analyses were used to characterize the nanocomposites and the results indicated that nano-Al and micro-Al were compactly wrapped by amorphous iron-oxide nanoparticles （about 20 nm）, respectively. The iron-oxide showed the mass ratio of Fe to O as similar as that in Fe2O3. Thermal analyses were performed on two nanocomposites, and four simple mixtures （nano-Al＋xero-Fe2O3, nano-Al＋micro-Fe2O3, micro-Al＋xero-Fe2O3, and micro-Al＋micro-Fe2O3） were also analyzed. There were not apparent distinctions in the reactions of thermites fueled by nano-Al. For thermites fueled by micro-Al, the DSC peak temperatures of micro-Al/Xero-Fe2O3 were advanced by 68.1 ℃ and 76.8 ℃ compared with micro-Al＋xero-Fe2O3 and micro-Al＋micro-Fe2O3, respectively. Four thermites, namely, nano-Al/xero-Fe2O3, nano-Al＋micro-Fe2O3, micro-Al/xero-Fe2O3, and micro-Al＋micro-Fe2O3, were heated from ambient temperature to 1020 ℃, during which the products at 660 ℃ and 1020 ℃ were collected and analyzed by XRD. Crystals of Fe, FeAl2O4, Fe3O4,α-Fe2O3, Al,γ-Fe2O3, Al2.667O4, FeO andα-Al2O3 were indexed in XRD patterns. For each thermite, according to the specific products, the possible equations were given. Based on the principle of the minimum free energy, the most reasonable equations were inferred from the possible reactions.展开更多
基金supported by Key Scientific and Technological Project of Henan Province(No.242102231060)Doctoral Scientific Research Foundation of Zhoukou Normal University(No.ZKNUC2021041)the Program of Innovative Research Team(in Science and Technology)in University of Henan Province(No.23IRTSTHN008)。
文摘Bacterial infection,insufficient angiogenesis,and oxidative damage are generally regarded as key issues that impede wound healing,making it necessary to prepare new biomaterials to simultaneously address these problems.In this work,monodispersed CeO_(2)@CuS nanocomposites(NCs)were successfully prepared with tannin(TA)as the reductant and linker.Due to abundant oxygen vacancies in CeO_(2)and the polyphenolic structure of TA,the TA-CeO_(2)@CuS NCs exhibited a remarkable antioxidant ability to scavenge excessive reactive oxygen species(ROS),which would likely induce serious inflammation.In addition,the TA-CeO_(2)@CuS NCs demonstrated excellent antibacterial capability with near-infrared ray(NIR)irradiation,and the released copper ions could promote the regeneration of blood vessels.These synergistic effects indicated that the synthesized TA-CeO_(2)@CuS NCs could serve as a promising biomaterial for multimodal wound therapy.
基金the support and funding from the National Natural Science Foundation of China (Nos. 51773164, 5186020071)Ningxia Natural Science Foundation (No. 2023AAC03104)。
文摘PVDF-based nanocomposites have gained significant focus in capacitors for their excellent dielectric strength, its multi-scale structural inhomogeneity is the bottleneck for improving the energy storage performance. Here, the composite components are optimized by the matrix modification,BST(Ba_(0.6)Sr_(0.4)TiO_(3)) ceramic fibrillation and surface coating. A series of PVDF/polymethyl methacrylate/lysozyme@BST nanofibers with continuous gradient distribution(PF-M/m BST nf-g) are prepared by the concentration gradient-biaxial high-speed electrospinning. The finite element simulation and experiment results indicate that the continuous gradient structure is favorable for the microstructure and inhomogeneity of the electric field distribution, significantly increasing the breakdown strength(Eb) and the permittivity(εr), as well as effectively suppressing the interfacial injected charge and leakage current. As a result, the energy storage density(Ue) of 23.1 J/cm^(3)at 600 MV/m with the charge-discharge efficiency(η) of 71% is achieved compared to PF-M(5.6 J/cm^(3)@350 MV/m, 65%). The exciting energy storage performance based on the well-designed PF-M/m BST nf-g provides important information for the development and application of polymer nanocomposite dielectrics.
文摘In recent years,smart materials have emerged as a groundbreaking innovation in the field of water filtration,offering sustainable,efficient,and environmentally friendly solutions to address the growing global water crisis.This review explores the latest advancements in the application of smart materials—including biomaterials,nanocomposites,and stimuli-responsive polymers—specifically for water treatment.It examines their effectiveness in detecting and removing various types of pollutants,including organic contaminants,heavy metals,and microbial infections,while adapting to dynamic environmental conditions such as fluctuations in temperature,pH,and pressure.The review highlights the remarkable versatility of these materials,emphasizing their multifunctionality,which allows them to address a wide range of water quality issues with high efficiency and low environmental impact.Moreover,it explores the potential of smart materials to overcome significant challenges in water purification,such as the need for real-time pollutant detection and targeted removal processes.The research also discusses the scalability and future development of these materials,considering their cost-effectiveness and potential for large-scale application.By aligning with the principles of sustainable development,smart materials represent a promising direction for ensuring global water security,offering both innovative solutions for current water pollution issues and long-term benefits for the environment and public health.
基金supported by the Fundamental Research Funds for the Central Universities(Nos.2232023D-01 and 2232023D-07)the Shanghai Science&Technology Committee(No.22ZR1403300)the National Natural Science Foundation of China(No.52372040).
文摘Metal-organic frameworks(MOFs)have attracted significant interest as self-templates and precursors for the synthesis of carbon-based composites aimed at electromagnetic wave(EMW)absorption.However,the utilization of high-temperature treatments has introduced uncertainties regarding the compositions and microstructures of resulting derivatives.Additionally,complete carbonization has led to diminished yields of the produced carbon composites,significantly limiting their practical applications.Consequently,the exploration of pristine MOF-based EMW absorbers presents an intriguing yet challenging endeavor,primarily due to inherently low electrical conductivity.In this study,we showcase the utilization of structurally robust Zr-MOFs as scaffolds to build highly conductive Zr-MOF/PPy composites via an inner-outer dual-modification approach,which involves the production of conducting polypyrrole(PPy)both within the confined nanoporous channels and the external surface of Zr-MOFs via post-synthetic modification.The interconnection of confined PPy and surface-lined PPy together leads to a consecutive and extensive conducting network to the maximum extent.This therefore entails outstanding conductivity up to~14.3 S cm^(-1) in Zr-MOF/PPy composites,which is approximately 1-2 orders of magnitude higher than that for conductive MOF nanocomposites constructed from either inner or outer modification.Benefiting from the strong and tunable conduction loss,as well as the induced dielectric polarization originated from the porous structures and MOF-polymer interfaces,Zr-MOF/PPy exhibits excellent microwave attenuation capabilities and a tunable absorption frequency range.Specifically,with only 15 wt.%loading,the minimum reflection loss(RLmin)can reach up to-67.4 dB,accompanied by an effective absorption bandwidth(EAB)extending to 6.74 GHz.Furthermore,the microwave absorption characteristics can be tailored from the C-band to the Ku-band by adjusting the loading of PPy.This work provides valuable insights into the fabrication of conductive MOF composites by presenting a straightforward pathway to enhance and reg-ulate electrical conduction in MOF-based nanocomposites,thus paving a way to facilely fabricate pristine MOF-based microwave absorbers.
基金supported by the PhD Start-up Fund of the Science and Technology Department of Liaoning Province(No.2022-BS-306)the General Cultivation Scientific Research Project of Bohai University(No.0522xn058)the PhD Research Startup Foundation of Bohai University(No.0521bs021).
文摘The preparation of electromagnetic(EM)wave absorption materials provided with the characteristics of thin matching thickness,broad bandwidth,and mighty absorption intensity is an efficient solution to current EM pollution.Herein,Graphene nanosheets(GN)were firstly fabricated via a facile high-energy ball milling method,subsequently high-purity 1T-MoS_(2) petals were uniformly anchored on the surface of GN to prepare 1T-MoS_(2)@GN nanocomposites.Plentiful multiple reflection and scattering of EM waves in a distinctive multidimensional structure formed by GN and 1T-MoS_(2),copious polarization loss consisting of interfacial polarization loss and dipolar polarization loss severally derived from multitudinous heterointerfaces and profuse electric dipoles in 1T-MoS_(2)@GN,and mighty conduction loss originated from plentiful induced current in 1T-MoS_(2)@GN generated via the migration of massive electrons,all of which endowed 1T-MoS_(2)@GN nanocomposites with exceptional EM wave absorption performances.The minimum reflection loss(RLmin)of 1T-MoS_(2)@GN reached–50.14 dB at a thickness of only 2.10 mm,and the effective absorption bandwidth(EAB)was up to 6.72 GHz at an ultra-thin matching thickness of 1.84 mm.Moreover,the radar scattering cross section(RCS)reduction value of 36.18 dB m2 at 0°could be achieved as well,which ulteriorly validated the tremendous potential of 1T-MoS_(2)@GN nanocomposites in practical applications.
文摘Concerns about air quality in dental clinics where aerosol generation during procedures poses significant health risks,have prompted investigations on advanced disinfection technologies.This editorial describes the strengths and limitations of ventilation and aerosol control measures in dental offices,especially with respect to the use of graphene nanocomposites.The potential of graphene nanocomposites as an innovative solution to aerosol-associated health risks is examined in this review due to the unique properties of graphene(e.g.,high con-ductivity,mechanical strength,and antimicrobial activity).These properties have produced promising results in various fields,but the application of graphene in dentistry remains unexplored.The recent study by Ju et al which was published in World Journal of Clinical Cases evaluated the effectiveness of graphene-based air disinfection systems in dental clinics.The study demonstrated that graphene-based disinfection techniques produced significant reductions in suspended particulate matter and bacterial colony counts,when co-mpared with traditional methods.Despite these positive results,challenges such as material saturation,frequency of filter replacement,and associated costs must be addressed before widespread adoption of graphene-based disinfection techniques in clinical practice.Therefore,there is need for further research on material structure optimization,long-term safety evaluations,and broader clinical applications,in order to maximize their positive impact on public health.
文摘This manuscript features the promising findings of a study conducted by Ju et al,who used graphene nanocomposites for air disinfection in dental clinics.Their study demonstrated that,compared with conventional filters,graphene nanocom-posites substantially improved air quality and reduced microbial contamination.This manuscript highlights the innovative application of graphene materials,emphasizing their potential to enhance dental clinic environments by minimizing secondary pollution.On the basis of the unique antimicrobial properties of gra-phene and the original study’s rigorous methodology,we recommend using gra-phene nanocomposites in clinical settings to control airborne infections.
基金the Puncak RM for the project under the grant 6733204-13069 to carry out the experiments。
文摘Graphene nanoplatelets(GNPs)have attracted tremendous interest due to their unique properties and bonding capabilities.This study focuses on the effect of GNP dispersion on the mechanical,thermal,and morphological behavior of GNP/epoxy nanocomposites.This study aims to understand how the dispersion of GNPs affects the properties of epoxy nanocomposite and to identify the best dispersion approach for improving mechanical performance.A solvent mixing technique that includes mechanical stirring and ultrasonication was used for producing the nanocomposites.Fourier transform infrared spectroscopy was used to investigate the interaction between GNPs and the epoxy matrix.The measurements of density and moisture content were used to confirm that GNPs were successfully incorporated into the nanocomposite.The findings showed that GNPs are successfully dispersed in the epoxy matrix by combining mechanical stirring and ultrasonication in a single step,producing well-dispersed nanocomposites with improved mechanical properties.Particularly,the nanocomposites at a low GNP loading of 0.1 wt%,demonstrate superior mechanical strength,as shown by increased tensile properties,including improved Young's modulus(1.86 GPa),strength(57.31 MPa),and elongation at break(4.98).The nanocomposite with 0.25 wt%GNP loading performs better,according to the viscoelastic analysis and flexural properties(113.18 MPa).Except for the nanocomposite with a 0.5 wt%GNP loading,which has a higher thermal breakdown temperature,the thermal characteristics do not significantly alter.The effective dispersion of GNPs in the epoxy matrix and low agglomeration is confirmed by the morphological characterization.The findings help with filler selection and identifying the best dispersion approach,which improves mechanical performance.The effective integration of GNPs and their interaction with the epoxy matrix provides the doorway for additional investigation and the development of sophisticated nanocomposites.In fields like aerospace,automotive,and electronics where higher mechanical performance and functionality are required,GNPs'improved mechanical properties and successful dispersion present exciting potential.
文摘Nanotechnology is transforming the textile industry by embedding UV-blocking and antimicrobial agents into fabric fibres at the molecular level. This study explores the development of biocomposites and nanocomposite materials for UV protection and microbial resistance in clothing. Nanoscale UV-blocking agents enhance the protection of textiles against harmful ultraviolet radiation. Recent studies on composites such as ZnO/carboxymethyl chitosan, polyacrylonitrile with UV absorbers and TiO2 nanoparticles, and lignin-TiO composites have shown significant improvements in UV protection and some antibacterial activity. Techniques such as electrospinning, hydrothermal synthesis, and natural fibre welding were used to create these composites, focusing on ZnO and TiO2 nanoparticles for dual functionality. Research on nanoscale UV-blocking agents could revolutionise sun protection in clothing and offer better safety against ultraviolet radiation. Multifunctional composites with UV-blocking and antibacterial properties could advance the use of protective clothing in various industries and outdoor activities. Emphasising natural fibres and sustainable materials aligns with the global trend towards eco-friendly solutions, leading to more environmentally friendly products. This literature review aims to comprehensively review and analyze current research on UV protective knit fabrics using nanotechnology, nanocomposites, and biocomposites. It seeks to identify research gaps, evaluate different approaches, and provide insights for future developments in this field.
基金financially supported by National Natural Science Foundations of China(No.52475216)the National Key Research and Development Program of China(No.2023YFE0206300)+1 种基金the Natural Science Foundation of Shaanxi Province(No.2024RS-CXTD-62)the Research Fund of the State Key Laboratory of Solidification Processing(NPU)(No.2022-QZ04)
文摘Lubricating greases are widely used in mechanical engineering,especially in rolling bearing.Carbon-based materials show promise as lubricant additive for formulating high-performance grease.However,the enhancement of lubrication performance of carbon-based materials limits by the simple lubricating mechanism.This work demonstrates that nanocomposite of metal-organic frameworks(MOFs)-derived carbon as a grease additive can improve the tribological properties of bentone grease.HKUST-1 was synthesized by a solvent method and converted into HKUST-1 derived carbon(HDC) via one-step pyrolysis sacrifice template method.After pyrolysis of HKUST-1 at 350℃,Cu_(2+)was reduced to zero-valence copper.With increasing pyrolysis temperature from 350 to 950℃,both the particle size of copper in HDC and the degree of graphite defect increased gradually.Types of HDCs as base grease additives significantly improved friction-reduction and anti-wear performance of bentone grease.Compared with the base grease,HDC-950 ℃ with the amount of 2 wt% addition reduced friction coefficient and wear volume loss by 35.5% and 97.0%,respectively.The superior tribological performance of the HDC-950℃is attributed to the synergistic effect of carbon and copper nanoparticles to induce tribochemical reaction,which form a stable protective film on the friction surfaces.This study highlights the potential of MOFs-derived carbon for developing high-performance grease additives.
文摘The characte rization of MgFe_(2)O_(4)@CeO_(2) superparamagnetic nanocomposites was tho roughly investigated using powder X-ray diffraction(XRD),a vibrating sample magnetometer(VSM),scanning electron microscopy(SEM),dispersive X-ray analysis(EDX),elemental mapping(MAP),transmission electron microscopy(TEM),Brunauer-Emmett-Teller(BET) and UV-Vis diffuse reflectance spectroscopy(DRS)analyses.The photocatalytic activity of the synthesized samples was evaluated as a novel magnetic nanocatalyst for degrading Congo red(CR) dye in an aqueous solution under visible light at room conditions.The results demonstrate that the efficiency of photocatalytic degradation is higher than that of absorbance and photolysis.The degradation efficiency of photodegradation is 93% within 49% of total organic carbon removal performance.The prepared MgFe_(2)O_(4)@CeO_(2) magnetic nanocomposites(MNCs)can be easily recovered and recycled for five repeated cycles,demonstrating potential extensive efficiency in magnetic nanocomposites in wastewater and water treatment.The nanoscale morphology of MgFe_(2)O_(4)@CeO_(2) MNCs was characterized as spherical,with a size range of 35-40 nm,utilizing SEM and TEM techniques.The saturation magnetization(M_(s)) of the resulting nanocomposites was analyzed by VSM,revealing a value of 3.58 emu/g.Furthermore,the surface area was determined to be 27.194 m^(2)/g using BET analysis,and the band gap was identified as 2.85 eV through DRS analysis.
文摘The food industry prioritizes food safety throughout the entire production process.This involves closely monitoring and evaluating all potential sources of biological or chemical contamination,starting from entering raw materials into the production chain and continuing to the final product.Biofilms on food surfaces or containers can harbor dangerous pathogens,such as Listeria monocytogenes.Therefore,it is essential to continuously manage microbial contamination on food contact surfaces to prevent foodborne infections.Recently,there has been increasing interest in using nanomaterials as surface coatings with antimicrobial properties in the food industry,especially since traditional disinfectants or antibiotics may contribute to developing resistance.However,the use of antibiofilm materials for long-term food storage remains underexplored,and there is a notable lack of focused reviews on nanomaterialbased antibiofilm coatings specifically for long-term food preservation.This review aims to consolidate recently reported nanoparticle-based antibiofilm food packaging materials.We discuss the effectiveness of various metal and metal oxide nanoparticles and biopolymer nanocomposites in combating biofilms.Additionally,we highlight the growing importance of biodegradable nanocomposite materials for antibiofilm food packaging.Furthermore,we explore the mechanisms of action,processing methods,and safety aspects of these nanomaterials being developed for food packaging applications.
基金supported by the National Natural Science Foundation of China(No.52371240)the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘The oxygen evolution reaction(OER),a critical half-reaction in water electrolysis,has garnered significant attention.However,sluggish OER kinetics has emerged as a major impediment to efficient electrochemical energy conversion.There is an urgent need to design novel electrocatalysts with optimized OER kinetics and enhanced intrinsic activity to improve overall OER performance.Herein,one-dimensional(1D)nanocomposites with high electrocatalytic activity were developed through the deposition of CoFePBA nanocubes onto the surface of MnO_(2) nanowires.The electronic structure of the nanocomposite surface was modified,and the synergistic effects between transition metals were leveraged to enhance catalytic activity through the deposition of Prussian blue analog(PBA)nanocubes on manganese dioxide nanowires.Specifically,CoFePBA featured an open crystal structure that offiered numerous electrochemical active sites and efficient charge transfer pathways.Additionally,the synergistic interactions between Co and Fe significantly reduced the OER overpotential.Additionally,the 1D rigid MnO_(2) acted as protective armor,ensuring the stability of active sites within CoFePBA during the OER.The synthesized MnO_(2)@CoFePBA achieved an overpotential of 1.614 V at 10 mA/cm^(2) and a small Tafel slope of 94 mV/dec and demonstrated stable performance for over 200 h.This work offers new insights into the rational design of various PBA-based nanocomposites with high activity and stability.
基金supported by the Guizhou Provincial Science and Technology Projects for Platform and Talent Team Plan(No.GCC[2023]007)the Innovation Group of Guizhou University([2024]08)+1 种基金Fok Ying Tung Education Foundation(No.171095)the National Natural Science Foundation of China(No.11964006).
文摘Hollow engineering plays a crucial role in enhancing interfacial polarization,which is an essential factor in microwave absorption.Herein,an in-situ growth approach was adopted to successively coating C layer and WS_(2) nanosheets on the surface SiO_(2) nanosphere.The obtained results suggested that the formed SiO_(2)@Void@C@WS_(2) multi-component nanocomposites(MCNCs)reveal a representative flower-like yolk-shell structure,which were manufactured massively through a simple channel.Additionally,the obtained SiO_(2)@Void@C@WS_(2) MCNCs presented a more and more obvious yolk-shell structure and reduced WS_(2) content with decreasing the addition of SiO_(2)@C or tungsten and sulfur sources.Because of their distinc-tive structures and remarkable cooperative effects,the SiO_(2)@Void@C@WS_(2) displayed excellent microwave absorption performances.Through the majorization of hollow structure and WS_(2),improved properties of SiO_(2)@Void@C@WS_(2) MCNCs could be acquired owing to their boosted polarization and conductive loss capabilities.Amongst,the resulting SiO_(2)@Void@C@WS_(2) MCNCs exhibited the effective absorption band and minimum reflection loss values of 5.40 GHz and−45.50 dB with matching thicknesses of 1.78 and 1.55 mm,respectively.Therefore,our findings employed hollow engineering and optimization strategies for components to design and fabricate the yolk-shell structure flower-like MCNCs,which acted as highly efficient wide-band microwave absorbing materials.
基金Project supported by China Postdoctoral Science Foundation(2020M673172)National Natural Science Foundation of China(61901401)。
文摘The effective detection of trace methyl mercaptan(CH_(3)SH)with low power consumption is crucial for assessing air quality and facilitating non-invasive diagnosis of diseases such as periodontitis.Herein,we synthesized a ternary CeO_(2)-ZnO-Ag nanocomposite by a simple sol-gel one-step method,which shows the capability of monitoring ppb-level CH_(3)SH under room temperature.The incorporation of Ag significantly reduces the particle size and increases the ratio of Ce^(3+)as well as oxygen vacancy.Furthermore,Ag nanoparticles improve light utilization efficiency in CeO_(2)-ZnO composites in favor of the separation of photo-generated charge carriers.The sensor based on the nanocomposites with 2 mol%Ag exhibits an exceptional response of 1.21 towards 50 ppb CH3SH at room temperature under photoassisted excitation(395 nm).Moreover,it shows a stable detection even in an environment with 57.6% humidity and high selectivity towards CH_(3)SH gas.The gas sensing mechanism study indicates that the enhancement in perfo rmance is prima rily attributed to an increased number of oxygen vacancies and the spillover effect of Ag,ultimately leading to an augmented reaction rate of CH_(3)SH on the surface of the sensing material.This work demonstrates that the optimized CeO_(2)-ZnO-Ag nanocomposites hold great promise for highly selective and sensitive detection of trace CH_(3)SH gas under specific humidity conditions.
基金the Foundation of Hubei Province Key Laboratory of Green Materials for Light Industry,Hubei University of Technology。
文摘The lipophilic hydroxyapatite(HA)nanorods were firstly synthesized by the solvothermal method using calcium oleate as the precursor.As-synthesized HA nanorods had an average aspect ratio of 11.4 with 18.4 wt%oleic acid attached on the surface.Then the hydroxyapatite/polylactic acid(HA/PLA)nanocomposites were prepared by dispersing the HA nanorods in PLA using dichloromethane(CH_(2)Cl_(2))as the volatile solvent.The influence of the HA content on the properties of the HA/PLA nanocomposites was investigated.It is found that the nanocomposite with 2 wt%HA exhibits the optimal mechanical properties.The tensile strength and elongation at break are 59.4 MPa and 18.19%,respectively.The values are enhanced by 13%and 184.2%compared with that of the pure PLA.The higher HA addition results in the decrease in the mechanical properties due to the aggregation of HA nanorods.The thermal properties of the HA/PLA nanocomposites were also examined.It is found that the thermal stability and crystallization transition temperature are decreased while the glass transition temperature and melting temperature remain basically unchanged with the increasing HA content up to 10 wt%.
基金supported by the National Key Research and Development of China(No.2018YFA0702804).
文摘Over the past several decades,the integration of IONs into EP emerged as an effective method for enhancing its mechanical properties.Nevertheless,challenges remain,especially with u-IONs,where the interfacial strength with EP is suboptimal,resulting in aggregation within the EP matrix and a subsequent deterioration in the mechanical performance of u-ION/EP nanocomposites.In this comprehensive review,we explored advanced chemical modification techniques tailored for IONs incorporated into EP,providing a detailed examination of the mechanical characteristics of surface cm-ION/EP nanocomposites.This review investigates various chemical modification methods and their distinct impacts on the mechanical attributes of the resulting EP nanocomposites.Special emphasis is given to addressing the persistent challenges of inadequate interfacial strength and aggregation.Furthermore,this article examines prospective surface modification approaches for inorganic oxide nanoparticles,offering a visionary outlook on methods to improve the mechanical performance of EP in future.
文摘In the article“Recent Advancements in Nanocomposites-Based Antibiofilm Food Packaging”by Bandana Padhan et al.(Journal of Polymer Materials,2025,Vol.42,No.2,pp.411–433.doi:10.32604/jpm.2024.059156),originally published online on December 9,2024,and formally included in Vol.42,No.2(published on July 11,2025).
基金financial supports from the National Natural Science Foundation of China(Grant No.NSFC52473104)National Key R&D Program of China(Grant No.2022YFC2104500)+3 种基金Zhejiang Provincial Natural Science Foundation of China(Grant No.Y24B040002)Ningbo 2025 Key Scientific Research Programs(Grant No.2022Z160)the China Postdoctoral Science Foundation(Grant No.2023M733601)the Ningbo Natural Science Foundation(Grant No.2023I333&2023J409).
文摘Renewable 2,5-furandicarboxylic acid-based polyesters are one of the most promising materials for achieving plastic replacement in the age of energy and environmental crisis.However,their properties still cannot compete with those of petrochemical-based plastics,owing to insufficient molecular and/or microstructure designs.Herein,we utilize the Ti_(3)C_(2)T_(x)-based MXene nanosheets for decorating carbon nanotube(CNT)and obtaining the structurally stable and highly dispersed dendritic heterostructured MXene@CNT,that can act as multi-roles,i.e.,polycondensation catalyst,crystal nucleator,and interface enhancer of polyester.The biobased MXene@CNT/polybutylene furandicarboxylate(PBF)(denoted as MCP)nanocomposites are synthesized by the strategy of“in situ catalytic polymerization and hot-pressing”.Benefiting from the multi-scale interactions(i.e.,covalent bonds,hydrogen bonds,and physical interlocks)in hybrid structure,the MCP presents exceptional mechanical strength(≈101 MPa),stiffness(≈3.1 GPa),toughness(≈130 MJ m^(-3)),and barrier properties(e.g.,O_(2)0.0187 barrer,CO_(2)0.0264 barrer,and H2O 1.57×10^(-14) g cm cm^(-2) s Pa)that are higher than most reported bio-based materials and engineering plastics.Moreover,it also displays satisfactory multifunctionality with high reprocessability(90%strength retention after 5 recycling),UV resistance(blocking 85%UVA rays),and solvent-resistant properties.As a state-of-art high-performance and multifunctional material,the novel bio-based MCP nanocomposite offers a more sustainable alternative to petrochemical-based plastics in packaging and engineering material fields.More importantly,our catalysis-interfacial strengthening integration strategy opens a door for designing and constructing high-performance bio-based polyester materials in future.
基金Project(51206081)supported by the National Natural Science Foundation of China
文摘Sol-gel method was employed to combine Al and iron-oxide to form nanocomposites （nano-Al/xero-Fe2O3 and micro-Al/xero-Fe2O3）. SEM, EDS and XRD analyses were used to characterize the nanocomposites and the results indicated that nano-Al and micro-Al were compactly wrapped by amorphous iron-oxide nanoparticles （about 20 nm）, respectively. The iron-oxide showed the mass ratio of Fe to O as similar as that in Fe2O3. Thermal analyses were performed on two nanocomposites, and four simple mixtures （nano-Al＋xero-Fe2O3, nano-Al＋micro-Fe2O3, micro-Al＋xero-Fe2O3, and micro-Al＋micro-Fe2O3） were also analyzed. There were not apparent distinctions in the reactions of thermites fueled by nano-Al. For thermites fueled by micro-Al, the DSC peak temperatures of micro-Al/Xero-Fe2O3 were advanced by 68.1 ℃ and 76.8 ℃ compared with micro-Al＋xero-Fe2O3 and micro-Al＋micro-Fe2O3, respectively. Four thermites, namely, nano-Al/xero-Fe2O3, nano-Al＋micro-Fe2O3, micro-Al/xero-Fe2O3, and micro-Al＋micro-Fe2O3, were heated from ambient temperature to 1020 ℃, during which the products at 660 ℃ and 1020 ℃ were collected and analyzed by XRD. Crystals of Fe, FeAl2O4, Fe3O4,α-Fe2O3, Al,γ-Fe2O3, Al2.667O4, FeO andα-Al2O3 were indexed in XRD patterns. For each thermite, according to the specific products, the possible equations were given. Based on the principle of the minimum free energy, the most reasonable equations were inferred from the possible reactions.
