Under solvothermal conditions,1,4‑naphthalenedicarboxylic acid(H_(2)ndc)and 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene(hfdp)reacted with Co^(2+)ions and Cd^(2+)ions to form two coordination polymers,[Co(hfdp)(ndc)(H2O...Under solvothermal conditions,1,4‑naphthalenedicarboxylic acid(H_(2)ndc)and 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene(hfdp)reacted with Co^(2+)ions and Cd^(2+)ions to form two coordination polymers,[Co(hfdp)(ndc)(H2O)]·DMA}n(1)and{[Cd(hfdp)(ndc)(H_(2)O)]·DMA}_(n)(2),respectively(DMA=N,N‑dimethylacetamide).Single‑crystal X‑ray diffraction analyses showed that both complexes 1 and 2 contain similar structures.Topological analysis indicates that complexes 1 and 2 have a{44·62}planar structure.In addition,both complexes reveal good thermal stability and fluorescence sensing performance.They exhibited good sensitivity and selectivity towards 2,4,6‑trinitrophenol(TNP)by fluorescent quenching.The limits of detection of 1 and 2 for TNP were 0.107 and 0.327μmol·L^(-1),respectively.CCDC:2475515,1;2475516,2.展开更多
The global energy landscape is undergoing a profound transformation,with wind energy,especially wind power,gaining increasing prominence due to its clean,renewable nature.However,as the installed capacity of wind powe...The global energy landscape is undergoing a profound transformation,with wind energy,especially wind power,gaining increasing prominence due to its clean,renewable nature.However,as the installed capacity of wind power continues to expand,the disposal of waste wind turbine blades(WWTB)has emerged as a significant challenge.These blades are predominantly composed of epoxy resin(EP)polymers,carbon fibers(CFs),and glass fibers(GFs).Improper disposal not only exacerbates environmental concerns but also leads to the loss of valuable resources,particularly carbon-based materials.Pyrolysis technology,a versatile and environmentally sustainable method for resource recovery,has garnered considerable attention in the context of WWTB disposal.This work presents a comprehensive review of the pyrolytic recycling of WWTB,focusing on the principles and classifications of pyrolysis technology,key factors influencing the pyrolysis process,as well as the pyrolysis methods,equipment,products,and their applications.Through an in-depth analysis of the current research on the pyrolytic recycling of WWTB,this review identifies critical unresolved issues in the field and provides a forward-looking perspective on emerging research trends.展开更多
Liver is a vital organ in the human body and plays a central role in the metabolism and detoxification of endotoxins and exotoxins.Bilirubin is an endotoxin derived from hemoglobin(Hb).Removing excess bilirubin in the...Liver is a vital organ in the human body and plays a central role in the metabolism and detoxification of endotoxins and exotoxins.Bilirubin is an endotoxin derived from hemoglobin(Hb).Removing excess bilirubin in the blood is crucial for the treatment of liver diseases.Hemoperfusion,which relies on adsorbents to efficiently adsorb toxins,is a widely applied procedure for the removal of blood toxins.To broaden and improve the range and performance of hemoperfusion adsorbents,we synthesized cationic hyper crosslinked polymers(HCPs)with strong affinity for bilirubin.This material exhibited outstanding adsorption performance,with a maximum adsorption capacity of 934 mg/g and a removal efficiency of 96%.Further investigation confirmed their excellent selectivity,reusability,and biocompatibility.These findings expand the potential applications of HCPs and provide insight into strategies for constructing promising hemoperfusion adsorbent materials.展开更多
Purpose of this novel review article is to unfold the current scientific worth of high performance polymer nanocomposite nanofibers,owing to growing scientific interests in this field.Accordingly,this state-of-the-art...Purpose of this novel review article is to unfold the current scientific worth of high performance polymer nanocomposite nanofibers,owing to growing scientific interests in this field.Accordingly,this state-of-the-art manuscript has been systematically categorized into distinct sections related to(i)fundamentals of carbonaceous nanoreinforcements,(ii)design-structure-property-performance aspects of different categories of polymer nanocomposite nanofibers(conducting polymers,thermoplastics,and thermosets with carbonaceous nanofillers carbon nanotubes,graphene,fullerene),and then(iii)existing scientific worth(energy devices,electronics,space/defense,environmental sectors),future prospects,challenges,and conclusions.As per literature to date,polymer/carbonaceous nanocomposite nanofibers had myriad of advantageous physical characters(morphologies,electrical/charge conduction,thermal conduction,mechanical/thermal resistance,anticorrosion,permeability,radiation absorption).Notably,among conducting polymer nanofibers,polyaniline/carbon nanotube nanofibers revealed superior specific capacitance(~380 Fg^(-1))due to interfacial synergies and electron/charge transfer.Moreover,poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester/fullerene nanofibers revealed power conversion efficiency~3.6%.Out of thermoplastic systems,poly(vinyl alcohol)/carbon nanotube nanofibers have been designed for piezoelectric sensors(pressure sensitivity~0.28 kPa^(-1))and toxicmetal ion sensors(lead(II)).In addition,cellulose/carbonaceous nanocomposite nanofibers have been applied for supercapacitor electrodes(specific capacitance~250 Fg^(-1))and electromagnetic interference shielding effectiveness(~64-70 dB).Furthermore,epoxy/carbon nanotube nanocomposites revealed~20%-40% enhancements in tensile strength and shear strength due to load transfer properties.As per literature,technological performance of these materials depends upon types/amount of polymers,nanocarbons,and processing methods/parameters used.Owing to novelty of topic,outline,and literature coverage,this review will serve as an all-inclusive guide for concerned field researchers to carry out further industrial scale advancements in the field of nanocomposite nanofibers.展开更多
Antibiotics,as an emerging pollutant due to their extensive use and difficulty in biodegradation,can cause harm to health through bioaccumulation.To address this,various photocatalysts have been developed for rapid an...Antibiotics,as an emerging pollutant due to their extensive use and difficulty in biodegradation,can cause harm to health through bioaccumulation.To address this,various photocatalysts have been developed for rapid antibiotic removal.However,their low concentrations limit mass transfer efficiency,resulting in suboptimal performance.Adsorption is crucial for enhancing photocatalytic efficiency.In this study,a series of binary heterojunction catalysts(x%BWO@STHP)were synthesized,consisting of Bi_(2)WO_(6)(BWO)grafted with sulfonated triptycene-based hypercrosslinked polymer(STHP).The high specific surface area of STHP,combined withπ-πconjugation and ionic interactions with antibiotics,significantly enhances adsorption capacity.This facilitates effective contact between low-concentration pollutants in aqueous solutions and the active sites of the catalyst.The formation of a Z-scheme heterojunction between BWO and STHP facilitates photogenerated charge separation,and further significantly improves photocatalytic degradation performance.Specifically,the 20%BWO@STHP catalyst achieved rapid adsorption equilibrium for oxytetracycline(OTC),doxycycline(DOX),and tetracycline(TC)within 2 min and completely degraded them after 15 min of irradiation.Compared to pristine BWO,the photocatalytic reaction rate constants are significantly increased,being 9.69 times higher for OTC and 13.45 times higher for DOX.The catalyst exhibits excellent reusability and holds promising potential for practical applications.展开更多
Organic room-temperature phosphorescence(RTP)materials are promising for bioimaging applications due to their tunable structures,excellent biocompatibility,and long-lived luminescence.However,the development of highly...Organic room-temperature phosphorescence(RTP)materials are promising for bioimaging applications due to their tunable structures,excellent biocompatibility,and long-lived luminescence.However,the development of highly efficient organic RTP materials for aqueous systems remains challenging,as the organic phosphorescence is prone to being quenched by the dissolved oxygen in water.Herein,heteroaromatic carboxylic acids serve as ligand vips to construct a series of host-vip composites with nontoxic,dense EDTA-M(M=Ca,Mg,and Al)coordination polymer in water.These composites exhibit ultra-long pure RTP of vip molecules with phosphorescence quantum yield up to 53%,and lifetime up to 589.7 ms,due to the synergistic effect of dual-network structure:a coordinatively cross-linked network of EDTA-M,and a non-covalent bonded network formed by ligands and water molecules.The phosphorescence intensity is more than three times that of the composite with a single coordination network.Notably,the dual-network configuration can form a rigid and dense structure and block the intrusion of external H_(2)O and O_(2) molecules to avoid phosphorescence quenching in water.As a result,the RTP of the composites remains unchanged after 1 month in water.Furthermore,the nanoparticles fabricated from composites and anionic surfactants can be successfully applied in in vivo imaging of mice for the stable RTP in water.This work provides a novel strategy for the development of high-performance RTP materials in aqueous systems.展开更多
The development of highly effective therapeutics is a priority in addressing the escalating threat that cancer poses to human health.Cyclodextrins(CDs) with exceptional biocompatibility and devisable structural hierar...The development of highly effective therapeutics is a priority in addressing the escalating threat that cancer poses to human health.Cyclodextrins(CDs) with exceptional biocompatibility and devisable structural hierarchy are emerging as versatile building blocks for engineered drug delivery systems,showing a promising prospect in cancer therapy.CDs enable precise synthesis of functionalized polymers with tailored architectures,endowing their excellent stability and large surface area to prolong drug circulation,enhance solubility,and increase targeting efficiency.Recently,CD-based nanotherapeutics has shown transformative potential in chemotherapy,phototherapy,immunotherapy,gene therapy and other codelivery systems of combination therapy.This review will introduce the types of CD-based nanotherapeutics,systematically summarize their design methods and anticancer application,and further discuss the prospects and challenges,providing a roadmap for advancing CD nanotechnology toward cancer therapeutics.展开更多
Conjugated microporous polymers(CMPs)are a unique class of organic porous materials characterized byπ-conjugated structures and permanent micropores,distinguishing them from non-porous polymers and conventionalπ-con...Conjugated microporous polymers(CMPs)are a unique class of organic porous materials characterized byπ-conjugated structures and permanent micropores,distinguishing them from non-porous polymers and conventionalπ-conjugated polymers.CMPs offer extensive versatility in synthetic approaches,enabling the synthesis of cross-linked and mesoporous structures.Advances in chemical processes,structural design,and synthesis methodologies have been developed,resulting in a diverse range of CMPs with unique configurations and properties,contributing to the fast expansion of the field.CMPs are particularly notable for their ability to enable the competitive utilization ofπ-conjugated structures within mesoporous configurations,making them valuable for investigations across various domains.They have shown considerable promise in addressing fuel and environmental challenges,demonstrated by their exceptional performance in applications such as vapor adsorption,heterogeneous catalysis,light emission,light harvesting,and energy generation.This review examines the chemical engineering principles underlying CMPs,including synthesis approaches,systemic research advancements,multifunctional investigations boundaries,potential applications,and progress in synthesis,dimensionality,and morphology studies.Specifically,it offers a comparative analysis of CMPs and linear polymeric materials,aiding in the development of functional polymers.Furthermore,this review explores the primary fundamental limitations of CMPs in fuel-related domains and discusses alternative strategies,including novel synthesis methods incorporating interactions and morphologies,to address these challenges.Ultimately,this assessment aims to provide a valuable and inspiring resource for professionals in the field of fuel management,guiding future research and development efforts.展开更多
Health monitoring is becoming increasingly critical for disease prevention,early diagnosis,and highquality living.Polymeric materials,with their mechanical flexibility,biocompatibility,and tunable biochemical properti...Health monitoring is becoming increasingly critical for disease prevention,early diagnosis,and highquality living.Polymeric materials,with their mechanical flexibility,biocompatibility,and tunable biochemical properties,offer unique advantages for creating next-generation personalized devices.In recent years,flexible polymer-based platforms have shown remarkable potential to capture diverse physiological signals in both daily and clinical contexts,including electrophysiological,biochemical,mechanical,and thermal indicators.In this review,we introduce a safety-leveloriented framework to evaluate material and device strategies for health monitoring,spanning the continuum from noninvasive wearables to deeply embedded implants.Physiological signals are systematically classified by use case,and application-specific requirements such as stability,comfort,and long-term compatibility are highlighted as critical factors guiding the selection of polymers,interfacial designs,and device architectures.Special emphasis is placed on mapping material types—including hydrogels,elastomers,and conductive composites—to their most suitable applications.Finally,we propose design principles for developing safe,functional,and adaptive polymer-based systems,aiming at reliable integration with the human body and enabling personalized,preventive healthcare.展开更多
Gel-based room-temperature phosphorescence(RTP)materials have garnered significant attention due to their promising applications in flexible electronics and photonics.However,the inherent swollen state and porous arch...Gel-based room-temperature phosphorescence(RTP)materials have garnered significant attention due to their promising applications in flexible electronics and photonics.However,the inherent swollen state and porous architecture of such gels often promote intense molecular motion and facilitate oxygen diffusion,which can severely quench phosphorescence under ambient conditions.In this work,we report a versatile strategy for constructing high-performance organic RTP materials by leveraging organic aerogels,which exhibit superior luminescent,mechanical,and thermal properties.Owing to their structural advantages,these organic aerogels possess a three-dimensional rigid framework that enhances intersystem crossing(ISC)efficiency and promotes multiple intermolecular interactions,thereby enabling efficient RTP with an ultralong phosphorescent lifetime of up to 1007 ms.Notably,the resulting RTP aerogels demonstrate exceptional structural robustness(compression modulus of 1 MPa),excellent thermal insulation(peak heat release rate reduced to 31.1 kW/m^(2)),and outstanding flame retardancy(limiting oxygen index exceeding 90%),positioning them among the most multifunctional organic aerogels reported to date.Given their balanced combination of RTP performance,mechanical resilience,and thermal stability,these phosphorescent aerogels represent a highly promising platform for the development of advanced,multifunctional organic RTP materials.展开更多
Pure organic room-temperature phosphorescent(RTP)polymers possess good processability and flexibility over small molecular crystals.However,most of RTP polymers reported so far are based on non-conjugated polymers,and...Pure organic room-temperature phosphorescent(RTP)polymers possess good processability and flexibility over small molecular crystals.However,most of RTP polymers reported so far are based on non-conjugated polymers,and achieving efficient phosphorescent emission in RTP conjugated polymers(CPs)remains a significant challenge.Herein,we developed two RTP CPs(P(PSe ZPh-p-Ph)and P(PSe ZPh-m-Ph))by linking the phenoselenazine units with the para-and meta-phenylene units,respectively,to form the conjugated main chains.The phenylene linker with different lingking mode manipulates the effictiveπ-conjugation of the polymer backbones.Comparing with the para-linked P(PSe ZPh-pPh),meta-linked P(PSe ZPh-m-Ph)exhibit the decreased effectiveπ-conjugation and the enhanced contribution of selenium atoms to the frontier orbitals,leading to the larger spin-orbit coupling(SOC)constants and the accelerated phosphorescence radiative decay process.The P(PSe ZPhm-Ph)achieves a phosphorescence quantum yield of 21.4%in doped polystyrene films,which is among the highest efficiencies reported to date for pure organic RTP CPs.These CPs are applied to construct phosphorescent film sensors for oxygen detection with the high quenching constants(K_(sv))up to 14.80 kPa^(-1)and low detection of limit of 0.84 ppm,demostrating the potential for application in oxygen film sensors.展开更多
Near-infrared(NIR)light-responsive shape memory polymers(SMPs)show great promise for biomedical applications,but conventional photothermal agents suffer from high cost,complex preparation,or poor biocompatibility,whil...Near-infrared(NIR)light-responsive shape memory polymers(SMPs)show great promise for biomedical applications,but conventional photothermal agents suffer from high cost,complex preparation,or poor biocompatibility,while lignin-based alternatives exhibit insufficient photothermal conversion efficiency.Herein,we developed a novel strategy to enhance photothermal performance of lignin through sequential demethylation modification and Fe^(3+)complexation for constructing NIR light responsive SMPs.Dealkaline lignin(DL)was first demethylated using iodocyclohexane to produce demethylated lignin(DDL)with increased catechol content,which was then incorporated into polycaprolactone-based polyurethane synthesis followed by Fe^(3+)complexation.Results showed that DDL-Fe^(3+)complexes have significantly enhanced photothermal conversion performance,and the resulting PU-DDL+Fe^(3+)polyurethane with 0.5 wt%DDL content demonstrated a temperature increases of 39.8℃under 0.33 W·cm-2808 nm NIR irradiation.This excellent photothermal performance enables the shape-fixed PU-DDL+Fe^(3+)polyurethane to rapidly recover to its initial shape under NIR light irradiation.Additionally,PU-DDL+Fe^(3+)polyurethane exhibits good mechanical properties and biocompatibility,demonstrating significant biomedical application potential.展开更多
Developing advanced polymeric materials with enhanced mechanical properties and functionalities has been a long-standing goal in materials science.Recently,supramolecular polymeric materials (SPMs) have drawn increase...Developing advanced polymeric materials with enhanced mechanical properties and functionalities has been a long-standing goal in materials science.Recently,supramolecular polymeric materials (SPMs) have drawn increased attention due to their unique properties and potential applications in self-healing,shape memory,sensors,and flexible electronics.Here,we develop an ionic cluster-optimized microphase separation strategy to enhance the toughening and energy dissipation capabilities of polydisulfide-based supramolecular polymers.The mechanical properties,including Young’s modulus and toughness,are significantly improved by integrating the quadruple H-bonding 2-ureido-4-pyrimidone (UPy) induced microphase separation with iron(Ⅲ)-to-carboxylate ionic clusters.By combining established chemical approaches with adjustable polymer phase ratios,it is revealed that the synergistic effect of these factors expands the interchain spacing,facilitates the formation of microphase domains,and enhances the tolerance of polythioctic acid-based polymers to external mechanical and thermal stimuli,meeting the practical requirements for industrial plastic applications.Moreover,the UPy-functionalized polymers incorporating iron carboxylate clusters exhibit good one-way shape memory behavior with practical applicability at a relatively low recovery temperature.Our work demonstrates a novel strategy for constructing industrially viable shape memory dynamic SPMs and paves the way for future innovations in developing SPMs.展开更多
The development of synthetic hybrid biological systems integrating photosynthetic organisms with organic-abiotic functional materials holds significant promise for enhancing photosynthetic processes.The artificial reg...The development of synthetic hybrid biological systems integrating photosynthetic organisms with organic-abiotic functional materials holds significant promise for enhancing photosynthetic processes.The artificial regulation of the state transition between photosystem I(PSI)and photosystem II(PSII)represents a strategic and promising approach for improving the efficiency of natural photosynthesis.In this study,we demonstrate that poly(benzimidazolium-phenylthiophene)(CP4)featuring a flexible cationic backbone exhibits superior ultraviolet light-harvesting capability.The polymer CP4 enhanced PSI activity in Chlorella pyrenoidosa(C.pyrenoidosa),subsequently promoting PSII activity and augmenting overall photosynthetic performance.During light-dependent reactions,CP4 significantly accelerated photosynthetic electron transfer,resulting in a 330%increase in the production of oxygen and 93%and 96%increases in the ATP and NADPH contents,respectively.In the context of dark reactions,CP4 facilitated the conversion and utilization of light energy,leading to a 6%increase in both carbohydrate and protein contents.These findings indicate that synthetic light-harvesting polymer materials exhibit considerable application potential in the field of biomass production through enhancement of natural photosynthetic efficiency.展开更多
Carbon-fiber-reinforced plastics(CFRP)with improved mechanical properties based on modified epoxy binders were investigated in this study.By adding 15 parts by weight(p.b.w.)of copolymer of polysulfone with cardo phth...Carbon-fiber-reinforced plastics(CFRP)with improved mechanical properties based on modified epoxy binders were investigated in this study.By adding 15 parts by weight(p.b.w.)of copolymer of polysulfone with cardo phthalide group(PSFP-70C)to the epoxyanhydride binder,the flexural strength of the epoxy polymer was increased by 60%,the CFRP based on it by 57%,the flexural modulus of the epoxy polymer was increased by 83%,and the composite by 96%.The adhesion strength of the binder to carbon fiber reached a high level at 10 p.b.w.of thermoplastic modifier and increased by 65%compared to the unmodified binder.Scanning electron microscopy(SEM)was used to determine that in epoxyanhydride systems with a polysulfone content of 5–15 p.b.w.,the structure belongs to the"matrix dispersion"type and with a content of 20 p.b.w.to the"interpenetrating phase"type.A heterogeneous structure was also observed using dynamic mechanical analysis.展开更多
A new principle for producing fire-resistant polymer materials with increased deformation properties using a flame retardant not as a heterogeneous additive,but as a thermoplastic flame retardant in a hybrid polymer m...A new principle for producing fire-resistant polymer materials with increased deformation properties using a flame retardant not as a heterogeneous additive,but as a thermoplastic flame retardant in a hybrid polymer mixture with a polyhydrocarbon is considered.Hybrid polymer blends of low-molecular ammonium polyphosphate(APP)with an ethylene-vinyl acetate copolymer(EVA)with an APP content of 80 wt%with enhanced deformation properties were obtained by extrusion mixing at various temperatures in the range from 200°C to 250°C.A chemical scheme for the transformations of the components during the formation of the composite is proposed.X-ray diffraction analysis showed the formation of new crystalline structures of APP.The phase structure of the systems corresponding to the model of a dispersed-filled composite in which EVA plays the role of a matrix,determining the deformation of the mixture,and the filler is ammonium polyphosphate,was studied by scanning electron microscopy(SEM).The method of FTIR microscopy showed chemical interactions between EVA and APP with the formation of amide groups.The conditions for obtaining compositions characterized by heat resistance of 210°C,oxygen index of 55 and ultimate elongation at drawing of 213%were established.展开更多
Bone regeneration for non-load-bearing defects remains a significant clinical challenge requiring advanced biomaterials and cellular strategies.Adiposederived mesenchymal stem cells(AD-MSCs)have garnered significant i...Bone regeneration for non-load-bearing defects remains a significant clinical challenge requiring advanced biomaterials and cellular strategies.Adiposederived mesenchymal stem cells(AD-MSCs)have garnered significant interest in bone tissue engineering(BTE)because of their abundant availability,minimally invasive harvesting procedures,and robust differentiation potential into osteogenic lineages.Unlike bone marrow-derived mesenchymal stem cells,AD-MSCs can be easily obtained in large quantities,making them appealing alternatives for therapeutic applications.This review explores hydrogels containing polymers,such as chitosan,collagen,gelatin,and hyaluronic acid,and their composites,tailored for BTE,and emphasizes the importance of these hydrogels as scaffolds for the delivery of AD-MSCs.Various hydrogel fabrication techniques and biocompatibility assessments are discussed,along with innovative modifications to enhance osteogenesis.This review also briefly outlines AD-MSC isolation methods and advanced embedding techniques for precise cell placement,such as direct encapsulation and three-dimensional bioprinting.We discuss the mechanisms of bone regeneration in the AD-MSC-laden hydrogels,including osteoinduction,vascularization,and extracellular matrix remodeling.We also review the preclinical and clinical applications of AD-MSC-hydrogel systems,emphasizing their success and limitations.In this review,we provide a comprehensive overview of AD-MSC-based hydrogel systems to guide the development of effective therapies for bone regeneration.展开更多
Anion exchange membranes(AEMs)are pivotal for advancing fuel cells and water electrolysis.However,their widespread adoption is hindered by the sluggish ion transport and inadequate durability.Herein,by tuning the numb...Anion exchange membranes(AEMs)are pivotal for advancing fuel cells and water electrolysis.However,their widespread adoption is hindered by the sluggish ion transport and inadequate durability.Herein,by tuning the number of conjugated aromatic rings and the branching sites within the monomers,a series of hyperbranched poly(aryl piperidinium)AEMs with coplanar polycyclic aromatic units are prepared to address the poor mechanical properties of rigid conjugated AEMs.The results indicate that the introduction of planar-conjugated triphenylene(TY)units in the polymer backbone facilitates ordered interchain aggregation driven byπ-πstacking interaction to form well-defined ion-conductive channels while suppressing excessive swelling and enhancing the membrane stability.The hyperbranched AEM containing the TY units(QTPTY)possesses excellent mechanical properties with 55.9 MPa of stress and 60.3%of strain.Additionally,the QTPTY membrane achieves an exceptional OH-conductivity of 146.4 m S cm^(-1)at 80℃,with 94.7%conductivity retention and mechanical properties reduction below 2%after 1600 h in 2 M Na OH.In an H_(2)/O_(2) fuel cell,QTPTY delivers a peak power density of 1.43 W cm^(-2),surpassing linear and the other twoπ-conjugated hyperbranched analogs.In water electrolysis,the AEM exhibits a current density of 2.30 A cm^(-2)at 1.80 V,exceeding the 2026 targets of the U.S.Department of Energy.This work demonstrates that planar-conjugated hyperbranched architectures have a significant potential in designing robust,high-performance AEMs for sustainable energy technologies.展开更多
In this study,a series of poly(ethylene succinate)-b-poly(butylene carbonate)(PES-b-PBC)multiblock copolymers were prepared through the chain-extension reaction of hydroxyl-terminated PES(PES-OH)and hydroxyl-terminate...In this study,a series of poly(ethylene succinate)-b-poly(butylene carbonate)(PES-b-PBC)multiblock copolymers were prepared through the chain-extension reaction of hydroxyl-terminated PES(PES-OH)and hydroxyl-terminated PBC(PBC-OH)prepolymers with 1,6-hexmethylene diisocyanate(HDI)as a chain extender.The effects of the prepolymer molecular weight and content on the structure and application properties of the PES-b-PBC copolymers were systematically investigated using various techniques.It was found that the compatibility of PES and PBC blocks in PES-b-PBC copolymers can be greatly enhanced by lowering the length of the prepolymers,and the amorphous phase of the PES and PBC chain segments in the PES-b-PBC copolymer would transform from immiscibility and partial miscibility to miscibility when the number-average molecular weight(M_(n))of the PES-OH and PBC-OH prepolymers is less than 2000 g/mol.Only the crystal structure of bare PES can be observed in the wide-angle X-ray diffraction(WAXD)spectrum of the PES-b-PBC copolymers,but their crystallinity degrees were found to decrease with increasing PBC fraction.The thermal behavior,crystallization performance,rheological properties,mechanical properties,and degradation properties of the PES-b-PBC multiblock copolymers can be easily modulated by altering the block length and composition of the prepolymers,offering potential applications in biodegradable materials.展开更多
2021年11月1日,中国科学院微生物研究所真菌学团队在国际期刊Carbohydrate Polymers(IF=12.5,中科院1区,Q1)在线发表题为“Polysaccharides from Lyophyllum decastes reduce obesity by altering gut microbiota and increasing energy...2021年11月1日,中国科学院微生物研究所真菌学团队在国际期刊Carbohydrate Polymers(IF=12.5,中科院1区,Q1)在线发表题为“Polysaccharides from Lyophyllum decastes reduce obesity by altering gut microbiota and increasing energy expenditure”的研究论文,揭示鹿茸菇(Lyophyllum decastes)多糖通过调节肠道菌群和增加能耗发挥抗肥胖作用。展开更多
文摘Under solvothermal conditions,1,4‑naphthalenedicarboxylic acid(H_(2)ndc)and 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene(hfdp)reacted with Co^(2+)ions and Cd^(2+)ions to form two coordination polymers,[Co(hfdp)(ndc)(H2O)]·DMA}n(1)and{[Cd(hfdp)(ndc)(H_(2)O)]·DMA}_(n)(2),respectively(DMA=N,N‑dimethylacetamide).Single‑crystal X‑ray diffraction analyses showed that both complexes 1 and 2 contain similar structures.Topological analysis indicates that complexes 1 and 2 have a{44·62}planar structure.In addition,both complexes reveal good thermal stability and fluorescence sensing performance.They exhibited good sensitivity and selectivity towards 2,4,6‑trinitrophenol(TNP)by fluorescent quenching.The limits of detection of 1 and 2 for TNP were 0.107 and 0.327μmol·L^(-1),respectively.CCDC:2475515,1;2475516,2.
基金Supported by the National Natural Science Foundation of China(22468035,22468036,22368038,22308048)the Natural Science Foundation of Inner Mongolia(2024QN02018,2025MS02030)+2 种基金First-class Discipline Research Special Project of Inner Mongolia(YLXKZX-NGD-045)Inner Mongolia Autonomous Region Postgraduate Research Innovation Project(KC2024047B)Research Foundation for Introducing High-level Talents in Inner Mongolia Autonomous Region。
文摘The global energy landscape is undergoing a profound transformation,with wind energy,especially wind power,gaining increasing prominence due to its clean,renewable nature.However,as the installed capacity of wind power continues to expand,the disposal of waste wind turbine blades(WWTB)has emerged as a significant challenge.These blades are predominantly composed of epoxy resin(EP)polymers,carbon fibers(CFs),and glass fibers(GFs).Improper disposal not only exacerbates environmental concerns but also leads to the loss of valuable resources,particularly carbon-based materials.Pyrolysis technology,a versatile and environmentally sustainable method for resource recovery,has garnered considerable attention in the context of WWTB disposal.This work presents a comprehensive review of the pyrolytic recycling of WWTB,focusing on the principles and classifications of pyrolysis technology,key factors influencing the pyrolysis process,as well as the pyrolysis methods,equipment,products,and their applications.Through an in-depth analysis of the current research on the pyrolytic recycling of WWTB,this review identifies critical unresolved issues in the field and provides a forward-looking perspective on emerging research trends.
基金financially supported by the International Cooperation Program of the Ministry of Science and Technology of Hubei Province(No.2023EHA069)Shenzhen Science and Technology Program(No.JCYJ20230807143702005)the National Foreign Experts Program(No.G2022027015L)。
文摘Liver is a vital organ in the human body and plays a central role in the metabolism and detoxification of endotoxins and exotoxins.Bilirubin is an endotoxin derived from hemoglobin(Hb).Removing excess bilirubin in the blood is crucial for the treatment of liver diseases.Hemoperfusion,which relies on adsorbents to efficiently adsorb toxins,is a widely applied procedure for the removal of blood toxins.To broaden and improve the range and performance of hemoperfusion adsorbents,we synthesized cationic hyper crosslinked polymers(HCPs)with strong affinity for bilirubin.This material exhibited outstanding adsorption performance,with a maximum adsorption capacity of 934 mg/g and a removal efficiency of 96%.Further investigation confirmed their excellent selectivity,reusability,and biocompatibility.These findings expand the potential applications of HCPs and provide insight into strategies for constructing promising hemoperfusion adsorbent materials.
文摘Purpose of this novel review article is to unfold the current scientific worth of high performance polymer nanocomposite nanofibers,owing to growing scientific interests in this field.Accordingly,this state-of-the-art manuscript has been systematically categorized into distinct sections related to(i)fundamentals of carbonaceous nanoreinforcements,(ii)design-structure-property-performance aspects of different categories of polymer nanocomposite nanofibers(conducting polymers,thermoplastics,and thermosets with carbonaceous nanofillers carbon nanotubes,graphene,fullerene),and then(iii)existing scientific worth(energy devices,electronics,space/defense,environmental sectors),future prospects,challenges,and conclusions.As per literature to date,polymer/carbonaceous nanocomposite nanofibers had myriad of advantageous physical characters(morphologies,electrical/charge conduction,thermal conduction,mechanical/thermal resistance,anticorrosion,permeability,radiation absorption).Notably,among conducting polymer nanofibers,polyaniline/carbon nanotube nanofibers revealed superior specific capacitance(~380 Fg^(-1))due to interfacial synergies and electron/charge transfer.Moreover,poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester/fullerene nanofibers revealed power conversion efficiency~3.6%.Out of thermoplastic systems,poly(vinyl alcohol)/carbon nanotube nanofibers have been designed for piezoelectric sensors(pressure sensitivity~0.28 kPa^(-1))and toxicmetal ion sensors(lead(II)).In addition,cellulose/carbonaceous nanocomposite nanofibers have been applied for supercapacitor electrodes(specific capacitance~250 Fg^(-1))and electromagnetic interference shielding effectiveness(~64-70 dB).Furthermore,epoxy/carbon nanotube nanocomposites revealed~20%-40% enhancements in tensile strength and shear strength due to load transfer properties.As per literature,technological performance of these materials depends upon types/amount of polymers,nanocarbons,and processing methods/parameters used.Owing to novelty of topic,outline,and literature coverage,this review will serve as an all-inclusive guide for concerned field researchers to carry out further industrial scale advancements in the field of nanocomposite nanofibers.
基金the financial support provided by the National Natural Science Foundation of China(22478267,22438009,U24A20535)Basic Research Program of Jiangsu province(BK20243002)+1 种基金Prospective Application Research Project of Suzhou(SYC2022042)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
文摘Antibiotics,as an emerging pollutant due to their extensive use and difficulty in biodegradation,can cause harm to health through bioaccumulation.To address this,various photocatalysts have been developed for rapid antibiotic removal.However,their low concentrations limit mass transfer efficiency,resulting in suboptimal performance.Adsorption is crucial for enhancing photocatalytic efficiency.In this study,a series of binary heterojunction catalysts(x%BWO@STHP)were synthesized,consisting of Bi_(2)WO_(6)(BWO)grafted with sulfonated triptycene-based hypercrosslinked polymer(STHP).The high specific surface area of STHP,combined withπ-πconjugation and ionic interactions with antibiotics,significantly enhances adsorption capacity.This facilitates effective contact between low-concentration pollutants in aqueous solutions and the active sites of the catalyst.The formation of a Z-scheme heterojunction between BWO and STHP facilitates photogenerated charge separation,and further significantly improves photocatalytic degradation performance.Specifically,the 20%BWO@STHP catalyst achieved rapid adsorption equilibrium for oxytetracycline(OTC),doxycycline(DOX),and tetracycline(TC)within 2 min and completely degraded them after 15 min of irradiation.Compared to pristine BWO,the photocatalytic reaction rate constants are significantly increased,being 9.69 times higher for OTC and 13.45 times higher for DOX.The catalyst exhibits excellent reusability and holds promising potential for practical applications.
基金supported by the Startup Funds for Introduced Talents of Wuyi University(YJ202304)the National Natural Science Foundation of China(22375044).
文摘Organic room-temperature phosphorescence(RTP)materials are promising for bioimaging applications due to their tunable structures,excellent biocompatibility,and long-lived luminescence.However,the development of highly efficient organic RTP materials for aqueous systems remains challenging,as the organic phosphorescence is prone to being quenched by the dissolved oxygen in water.Herein,heteroaromatic carboxylic acids serve as ligand vips to construct a series of host-vip composites with nontoxic,dense EDTA-M(M=Ca,Mg,and Al)coordination polymer in water.These composites exhibit ultra-long pure RTP of vip molecules with phosphorescence quantum yield up to 53%,and lifetime up to 589.7 ms,due to the synergistic effect of dual-network structure:a coordinatively cross-linked network of EDTA-M,and a non-covalent bonded network formed by ligands and water molecules.The phosphorescence intensity is more than three times that of the composite with a single coordination network.Notably,the dual-network configuration can form a rigid and dense structure and block the intrusion of external H_(2)O and O_(2) molecules to avoid phosphorescence quenching in water.As a result,the RTP of the composites remains unchanged after 1 month in water.Furthermore,the nanoparticles fabricated from composites and anionic surfactants can be successfully applied in in vivo imaging of mice for the stable RTP in water.This work provides a novel strategy for the development of high-performance RTP materials in aqueous systems.
基金financially supported by National Natural Science Foundation of China (No.3240117,X.S)Sichuan Science and Technology Program (No.2024YFFK0345,Z.X)+3 种基金Natural Science Foundation of Chongqing (No.CSTB2024NSCQ-MSX0046,F.R)Startup Fund of Chongqing Normal University (No.23XLB036,F.R)National College Student Innovation and Entrepreneurship Program of Southwest University (No.202410635109,Y.Z)Guangdong High-level Hospital Construction Fund。
文摘The development of highly effective therapeutics is a priority in addressing the escalating threat that cancer poses to human health.Cyclodextrins(CDs) with exceptional biocompatibility and devisable structural hierarchy are emerging as versatile building blocks for engineered drug delivery systems,showing a promising prospect in cancer therapy.CDs enable precise synthesis of functionalized polymers with tailored architectures,endowing their excellent stability and large surface area to prolong drug circulation,enhance solubility,and increase targeting efficiency.Recently,CD-based nanotherapeutics has shown transformative potential in chemotherapy,phototherapy,immunotherapy,gene therapy and other codelivery systems of combination therapy.This review will introduce the types of CD-based nanotherapeutics,systematically summarize their design methods and anticancer application,and further discuss the prospects and challenges,providing a roadmap for advancing CD nanotechnology toward cancer therapeutics.
基金supported by the King Khalid University,Abha,Saudi Arabiathe Deanship of Scientific Research at King Khalid University for funding this work through Large Groups Project under grant number(R.G.P.2/335/46)the Guangdong Office of Research Projects at the Provincial University(No.2024KCXTD064)。
文摘Conjugated microporous polymers(CMPs)are a unique class of organic porous materials characterized byπ-conjugated structures and permanent micropores,distinguishing them from non-porous polymers and conventionalπ-conjugated polymers.CMPs offer extensive versatility in synthetic approaches,enabling the synthesis of cross-linked and mesoporous structures.Advances in chemical processes,structural design,and synthesis methodologies have been developed,resulting in a diverse range of CMPs with unique configurations and properties,contributing to the fast expansion of the field.CMPs are particularly notable for their ability to enable the competitive utilization ofπ-conjugated structures within mesoporous configurations,making them valuable for investigations across various domains.They have shown considerable promise in addressing fuel and environmental challenges,demonstrated by their exceptional performance in applications such as vapor adsorption,heterogeneous catalysis,light emission,light harvesting,and energy generation.This review examines the chemical engineering principles underlying CMPs,including synthesis approaches,systemic research advancements,multifunctional investigations boundaries,potential applications,and progress in synthesis,dimensionality,and morphology studies.Specifically,it offers a comparative analysis of CMPs and linear polymeric materials,aiding in the development of functional polymers.Furthermore,this review explores the primary fundamental limitations of CMPs in fuel-related domains and discusses alternative strategies,including novel synthesis methods incorporating interactions and morphologies,to address these challenges.Ultimately,this assessment aims to provide a valuable and inspiring resource for professionals in the field of fuel management,guiding future research and development efforts.
基金the financial support from the National University of Singapore(Grant No.A-001002800-00)the Singapore Ministry of Education(Grant No.A-8003587-00-00)。
文摘Health monitoring is becoming increasingly critical for disease prevention,early diagnosis,and highquality living.Polymeric materials,with their mechanical flexibility,biocompatibility,and tunable biochemical properties,offer unique advantages for creating next-generation personalized devices.In recent years,flexible polymer-based platforms have shown remarkable potential to capture diverse physiological signals in both daily and clinical contexts,including electrophysiological,biochemical,mechanical,and thermal indicators.In this review,we introduce a safety-leveloriented framework to evaluate material and device strategies for health monitoring,spanning the continuum from noninvasive wearables to deeply embedded implants.Physiological signals are systematically classified by use case,and application-specific requirements such as stability,comfort,and long-term compatibility are highlighted as critical factors guiding the selection of polymers,interfacial designs,and device architectures.Special emphasis is placed on mapping material types—including hydrogels,elastomers,and conductive composites—to their most suitable applications.Finally,we propose design principles for developing safe,functional,and adaptive polymer-based systems,aiming at reliable integration with the human body and enabling personalized,preventive healthcare.
基金supported by the National Natural Science Foundation of China(22475172 and 52203242)the Zhejiang Provincial Natural Science Foundation of China(LQ23B020004)the Fundamental Research Funds for the Central Universities.
文摘Gel-based room-temperature phosphorescence(RTP)materials have garnered significant attention due to their promising applications in flexible electronics and photonics.However,the inherent swollen state and porous architecture of such gels often promote intense molecular motion and facilitate oxygen diffusion,which can severely quench phosphorescence under ambient conditions.In this work,we report a versatile strategy for constructing high-performance organic RTP materials by leveraging organic aerogels,which exhibit superior luminescent,mechanical,and thermal properties.Owing to their structural advantages,these organic aerogels possess a three-dimensional rigid framework that enhances intersystem crossing(ISC)efficiency and promotes multiple intermolecular interactions,thereby enabling efficient RTP with an ultralong phosphorescent lifetime of up to 1007 ms.Notably,the resulting RTP aerogels demonstrate exceptional structural robustness(compression modulus of 1 MPa),excellent thermal insulation(peak heat release rate reduced to 31.1 kW/m^(2)),and outstanding flame retardancy(limiting oxygen index exceeding 90%),positioning them among the most multifunctional organic aerogels reported to date.Given their balanced combination of RTP performance,mechanical resilience,and thermal stability,these phosphorescent aerogels represent a highly promising platform for the development of advanced,multifunctional organic RTP materials.
基金supported by the National Natural Science Foundation of China(Nos.22275182,22075272,51973211,51833009,21674111 and 52261135541)the Ministry of Science and Technology of the People’s Republic of China(the National Key R&D Program of China,No.2022YFB4200400)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB0520102)。
文摘Pure organic room-temperature phosphorescent(RTP)polymers possess good processability and flexibility over small molecular crystals.However,most of RTP polymers reported so far are based on non-conjugated polymers,and achieving efficient phosphorescent emission in RTP conjugated polymers(CPs)remains a significant challenge.Herein,we developed two RTP CPs(P(PSe ZPh-p-Ph)and P(PSe ZPh-m-Ph))by linking the phenoselenazine units with the para-and meta-phenylene units,respectively,to form the conjugated main chains.The phenylene linker with different lingking mode manipulates the effictiveπ-conjugation of the polymer backbones.Comparing with the para-linked P(PSe ZPh-pPh),meta-linked P(PSe ZPh-m-Ph)exhibit the decreased effectiveπ-conjugation and the enhanced contribution of selenium atoms to the frontier orbitals,leading to the larger spin-orbit coupling(SOC)constants and the accelerated phosphorescence radiative decay process.The P(PSe ZPhm-Ph)achieves a phosphorescence quantum yield of 21.4%in doped polystyrene films,which is among the highest efficiencies reported to date for pure organic RTP CPs.These CPs are applied to construct phosphorescent film sensors for oxygen detection with the high quenching constants(K_(sv))up to 14.80 kPa^(-1)and low detection of limit of 0.84 ppm,demostrating the potential for application in oxygen film sensors.
基金supported by the National Natural Science Foundation of China(Nos.51603005,52403186 and 52573150)Fujian Provincial Natural Science Foundation of China(No.2024J011447)+1 种基金Natural Science Foundation of Xiamen,China(No.3502Z20227305)the Postdoctoral Fellowship Program of CPSF(No.GZC20240095)。
文摘Near-infrared(NIR)light-responsive shape memory polymers(SMPs)show great promise for biomedical applications,but conventional photothermal agents suffer from high cost,complex preparation,or poor biocompatibility,while lignin-based alternatives exhibit insufficient photothermal conversion efficiency.Herein,we developed a novel strategy to enhance photothermal performance of lignin through sequential demethylation modification and Fe^(3+)complexation for constructing NIR light responsive SMPs.Dealkaline lignin(DL)was first demethylated using iodocyclohexane to produce demethylated lignin(DDL)with increased catechol content,which was then incorporated into polycaprolactone-based polyurethane synthesis followed by Fe^(3+)complexation.Results showed that DDL-Fe^(3+)complexes have significantly enhanced photothermal conversion performance,and the resulting PU-DDL+Fe^(3+)polyurethane with 0.5 wt%DDL content demonstrated a temperature increases of 39.8℃under 0.33 W·cm-2808 nm NIR irradiation.This excellent photothermal performance enables the shape-fixed PU-DDL+Fe^(3+)polyurethane to rapidly recover to its initial shape under NIR light irradiation.Additionally,PU-DDL+Fe^(3+)polyurethane exhibits good mechanical properties and biocompatibility,demonstrating significant biomedical application potential.
基金supported by the National Natural Science Foundation of China(No.22375063)Science and Technology Commission of Shanghai Municipality(No.23JC1401700)the Fundamental Research Funds for the Central Universities.
文摘Developing advanced polymeric materials with enhanced mechanical properties and functionalities has been a long-standing goal in materials science.Recently,supramolecular polymeric materials (SPMs) have drawn increased attention due to their unique properties and potential applications in self-healing,shape memory,sensors,and flexible electronics.Here,we develop an ionic cluster-optimized microphase separation strategy to enhance the toughening and energy dissipation capabilities of polydisulfide-based supramolecular polymers.The mechanical properties,including Young’s modulus and toughness,are significantly improved by integrating the quadruple H-bonding 2-ureido-4-pyrimidone (UPy) induced microphase separation with iron(Ⅲ)-to-carboxylate ionic clusters.By combining established chemical approaches with adjustable polymer phase ratios,it is revealed that the synergistic effect of these factors expands the interchain spacing,facilitates the formation of microphase domains,and enhances the tolerance of polythioctic acid-based polymers to external mechanical and thermal stimuli,meeting the practical requirements for industrial plastic applications.Moreover,the UPy-functionalized polymers incorporating iron carboxylate clusters exhibit good one-way shape memory behavior with practical applicability at a relatively low recovery temperature.Our work demonstrates a novel strategy for constructing industrially viable shape memory dynamic SPMs and paves the way for future innovations in developing SPMs.
基金supported by the National Key R&D Program of China(Nos.2023YFC3404200,2023YFC34042012023YFC3404202)+1 种基金the National Natural Science Foundation of China(No.22575253)the Beijing Natural Science Foundation(No.Z220025)。
文摘The development of synthetic hybrid biological systems integrating photosynthetic organisms with organic-abiotic functional materials holds significant promise for enhancing photosynthetic processes.The artificial regulation of the state transition between photosystem I(PSI)and photosystem II(PSII)represents a strategic and promising approach for improving the efficiency of natural photosynthesis.In this study,we demonstrate that poly(benzimidazolium-phenylthiophene)(CP4)featuring a flexible cationic backbone exhibits superior ultraviolet light-harvesting capability.The polymer CP4 enhanced PSI activity in Chlorella pyrenoidosa(C.pyrenoidosa),subsequently promoting PSII activity and augmenting overall photosynthetic performance.During light-dependent reactions,CP4 significantly accelerated photosynthetic electron transfer,resulting in a 330%increase in the production of oxygen and 93%and 96%increases in the ATP and NADPH contents,respectively.In the context of dark reactions,CP4 facilitated the conversion and utilization of light energy,leading to a 6%increase in both carbohydrate and protein contents.These findings indicate that synthetic light-harvesting polymer materials exhibit considerable application potential in the field of biomass production through enhancement of natural photosynthetic efficiency.
基金financially supported by the Ministry of Science and Higher Education of the Russian Federation。
文摘Carbon-fiber-reinforced plastics(CFRP)with improved mechanical properties based on modified epoxy binders were investigated in this study.By adding 15 parts by weight(p.b.w.)of copolymer of polysulfone with cardo phthalide group(PSFP-70C)to the epoxyanhydride binder,the flexural strength of the epoxy polymer was increased by 60%,the CFRP based on it by 57%,the flexural modulus of the epoxy polymer was increased by 83%,and the composite by 96%.The adhesion strength of the binder to carbon fiber reached a high level at 10 p.b.w.of thermoplastic modifier and increased by 65%compared to the unmodified binder.Scanning electron microscopy(SEM)was used to determine that in epoxyanhydride systems with a polysulfone content of 5–15 p.b.w.,the structure belongs to the"matrix dispersion"type and with a content of 20 p.b.w.to the"interpenetrating phase"type.A heterogeneous structure was also observed using dynamic mechanical analysis.
基金financially supported by Ministry of Science and Higher Education of the Russian Federation.
文摘A new principle for producing fire-resistant polymer materials with increased deformation properties using a flame retardant not as a heterogeneous additive,but as a thermoplastic flame retardant in a hybrid polymer mixture with a polyhydrocarbon is considered.Hybrid polymer blends of low-molecular ammonium polyphosphate(APP)with an ethylene-vinyl acetate copolymer(EVA)with an APP content of 80 wt%with enhanced deformation properties were obtained by extrusion mixing at various temperatures in the range from 200°C to 250°C.A chemical scheme for the transformations of the components during the formation of the composite is proposed.X-ray diffraction analysis showed the formation of new crystalline structures of APP.The phase structure of the systems corresponding to the model of a dispersed-filled composite in which EVA plays the role of a matrix,determining the deformation of the mixture,and the filler is ammonium polyphosphate,was studied by scanning electron microscopy(SEM).The method of FTIR microscopy showed chemical interactions between EVA and APP with the formation of amide groups.The conditions for obtaining compositions characterized by heat resistance of 210°C,oxygen index of 55 and ultimate elongation at drawing of 213%were established.
文摘Bone regeneration for non-load-bearing defects remains a significant clinical challenge requiring advanced biomaterials and cellular strategies.Adiposederived mesenchymal stem cells(AD-MSCs)have garnered significant interest in bone tissue engineering(BTE)because of their abundant availability,minimally invasive harvesting procedures,and robust differentiation potential into osteogenic lineages.Unlike bone marrow-derived mesenchymal stem cells,AD-MSCs can be easily obtained in large quantities,making them appealing alternatives for therapeutic applications.This review explores hydrogels containing polymers,such as chitosan,collagen,gelatin,and hyaluronic acid,and their composites,tailored for BTE,and emphasizes the importance of these hydrogels as scaffolds for the delivery of AD-MSCs.Various hydrogel fabrication techniques and biocompatibility assessments are discussed,along with innovative modifications to enhance osteogenesis.This review also briefly outlines AD-MSC isolation methods and advanced embedding techniques for precise cell placement,such as direct encapsulation and three-dimensional bioprinting.We discuss the mechanisms of bone regeneration in the AD-MSC-laden hydrogels,including osteoinduction,vascularization,and extracellular matrix remodeling.We also review the preclinical and clinical applications of AD-MSC-hydrogel systems,emphasizing their success and limitations.In this review,we provide a comprehensive overview of AD-MSC-based hydrogel systems to guide the development of effective therapies for bone regeneration.
基金the financial support from the National Natural Science Foundation of China(Grant Nos.22278340&22078272)。
文摘Anion exchange membranes(AEMs)are pivotal for advancing fuel cells and water electrolysis.However,their widespread adoption is hindered by the sluggish ion transport and inadequate durability.Herein,by tuning the number of conjugated aromatic rings and the branching sites within the monomers,a series of hyperbranched poly(aryl piperidinium)AEMs with coplanar polycyclic aromatic units are prepared to address the poor mechanical properties of rigid conjugated AEMs.The results indicate that the introduction of planar-conjugated triphenylene(TY)units in the polymer backbone facilitates ordered interchain aggregation driven byπ-πstacking interaction to form well-defined ion-conductive channels while suppressing excessive swelling and enhancing the membrane stability.The hyperbranched AEM containing the TY units(QTPTY)possesses excellent mechanical properties with 55.9 MPa of stress and 60.3%of strain.Additionally,the QTPTY membrane achieves an exceptional OH-conductivity of 146.4 m S cm^(-1)at 80℃,with 94.7%conductivity retention and mechanical properties reduction below 2%after 1600 h in 2 M Na OH.In an H_(2)/O_(2) fuel cell,QTPTY delivers a peak power density of 1.43 W cm^(-2),surpassing linear and the other twoπ-conjugated hyperbranched analogs.In water electrolysis,the AEM exhibits a current density of 2.30 A cm^(-2)at 1.80 V,exceeding the 2026 targets of the U.S.Department of Energy.This work demonstrates that planar-conjugated hyperbranched architectures have a significant potential in designing robust,high-performance AEMs for sustainable energy technologies.
基金financially supported by the Science and Technology Projects of Changji Prefecture(No.2023112258)Shihezi Coal Chemical Industry Common Technology Research Institute Project(No.MGJY0104)the Program for Young Innovative Talents of Shihezi University(No.CXFZ202302).
文摘In this study,a series of poly(ethylene succinate)-b-poly(butylene carbonate)(PES-b-PBC)multiblock copolymers were prepared through the chain-extension reaction of hydroxyl-terminated PES(PES-OH)and hydroxyl-terminated PBC(PBC-OH)prepolymers with 1,6-hexmethylene diisocyanate(HDI)as a chain extender.The effects of the prepolymer molecular weight and content on the structure and application properties of the PES-b-PBC copolymers were systematically investigated using various techniques.It was found that the compatibility of PES and PBC blocks in PES-b-PBC copolymers can be greatly enhanced by lowering the length of the prepolymers,and the amorphous phase of the PES and PBC chain segments in the PES-b-PBC copolymer would transform from immiscibility and partial miscibility to miscibility when the number-average molecular weight(M_(n))of the PES-OH and PBC-OH prepolymers is less than 2000 g/mol.Only the crystal structure of bare PES can be observed in the wide-angle X-ray diffraction(WAXD)spectrum of the PES-b-PBC copolymers,but their crystallinity degrees were found to decrease with increasing PBC fraction.The thermal behavior,crystallization performance,rheological properties,mechanical properties,and degradation properties of the PES-b-PBC multiblock copolymers can be easily modulated by altering the block length and composition of the prepolymers,offering potential applications in biodegradable materials.
文摘2021年11月1日,中国科学院微生物研究所真菌学团队在国际期刊Carbohydrate Polymers(IF=12.5,中科院1区,Q1)在线发表题为“Polysaccharides from Lyophyllum decastes reduce obesity by altering gut microbiota and increasing energy expenditure”的研究论文,揭示鹿茸菇(Lyophyllum decastes)多糖通过调节肠道菌群和增加能耗发挥抗肥胖作用。
