Biodegradable metals have garnered considerable interest owing to their capacity for self-degradation following the repair of damaged tissues.This review commences with their historical development and clarifies the e...Biodegradable metals have garnered considerable interest owing to their capacity for self-degradation following the repair of damaged tissues.This review commences with their historical development and clarifies the essential prerequisites for their successful clinical translation.Subsequently,a detailed review of magnesium-based materials is presented from five critical areas of alloying,fabrication techniques,purification,surface modification,and structural design,systematically addressing their progress in biodegradation rate retardation,mechanical reinforcement,and biocompatibility enhancement.Furthermore,recent breakthroughs in vivo animal experiments and clinical translation of magnesium alloys are summarized.Finally,this review concludes with a critical assessment of the achievements and challenges encountered in the clinical application of these materials,and proposes practical strategies to address current limitations and guide future research perspectives.展开更多
Surface modification of fabrics is an effective way to endow them with antifouling properties while still maintaining their key advantages such as comfort,softness and stretchability.Herein,an atmospheric pressure die...Surface modification of fabrics is an effective way to endow them with antifouling properties while still maintaining their key advantages such as comfort,softness and stretchability.Herein,an atmospheric pressure dielectric barrier discharge(DBD)plasma method is demonstrated for the processing of silk fabrics using 1H,1H,2H,2H-perfluorodecyltriethoxysilane(PFDS)as the precursor.The results showed the successful grafting of PFDS groups onto the surface of silk fabrics without causing damage.Meanwhile,the gas temperature is rather low during the whole processing procedure,suggesting the non-equilibrium characteristics of DBD plasma.The influence on fabrics of the processing parameters(PFDS concentration,plasma treatment time and plasma discharge power)was systematically investigated.An optimum processing condition was determined to be a PFDS concentration of 8wt%,a plasma processing time of 40 s and a plasma power of 11.87 W.However,with prolonged plasma processing time or enhanced plasma power,the plasma-grafted PFDS films could be degraded.Further study revealed that plasma processing of silk fabrics with PFDS would lead to a change in their chemical composition and surface roughness.As a result,the surface energy of the fabrics was reduced,accompanied by improved water and oil repellency as well as enhanced antifouling performance.Besides,the plasma-grafted PFDS films also had good durability and stability.By extending the method to polyester and wool against different oil-/water-based stains,the DBD plasma surface modification technique demonstrated good versatility in improving the antifouling properties of fabrics.This work provides guidance for the surface modification of fabrics using DBD plasma to confer them with desirable functionalities.展开更多
Lithium metal,with its exceptionally high theoretical capacity,emerges as the optimal anode choice for high-energy-density rechargeable batteries.Nevertheless,the practical application of lithium metal batteries(LMBs)...Lithium metal,with its exceptionally high theoretical capacity,emerges as the optimal anode choice for high-energy-density rechargeable batteries.Nevertheless,the practical application of lithium metal batteries(LMBs)is constrained by issues such as lithium dendrite growth and low Coulombic efficiency(CE).Herein,a roll-to-roll approach is adopted to prepare meter-scale,lithiophilic Sn-modified Cu mesh(Sn@Cu mesh)as the current collector for long-cycle lithium metal batteries.The two-dimensional(2D)nucleation mechanism on Sn@Cu mesh electrodes promotes a uniform Li flux,facilitating the deposition of Li metal in a large granular morphology.Simultaneously,experimental and computational analyses revealed that the distribution of the electric field in the Cu mesh skeleton induces Li inward growth,thereby generating a uniform,dense composite Li anode.Moreover,the Sn@Cu mesh-Li symmetrical cell demonstrates stable cycling for over 2000 h with an ultra-low 10 mV voltage polarization.In Li||Cu half-cells,the Sn@Cu mesh electrode demonstrates stable cycling for 100 cycles at a high areal capacity of 5 mAh·cm^(-2),achieving a CE of 99.2%.This study introduces a simple and large-scale approach for the production of lithiophilic three-dimensional(3D)current collectors,providing more possibilities for the scalable application of Li metal batteries.展开更多
Metal-organic frameworks（MOFs） are a unique class of porous crystalline materials that have shown promise for a wide range of applications. MOFs have been explored as a new type of heterogeneous catalytic materials,...Metal-organic frameworks（MOFs） are a unique class of porous crystalline materials that have shown promise for a wide range of applications. MOFs have been explored as a new type of heterogeneous catalytic materials, because of their high surface area, uniform and tunable pores, facile functionalization and incorporation of catalytic active sites. The use of multi-functional sites MOF materials as catalysts for synergistic catalysis and tandem reactions has attracted increasing attention. In this review, we aim to introduce the construction of bi-or multi-functional MOF catalysts with cooperative or cascade functions via post-synthetic modification（PSM）.展开更多
Apocynum venetum/cotton blended fabrics have been subjected to treat with cationic polymer nanoparticles followed by dyeing with Acid Red B,and then studied for their dyeing performance and morphology.The investigatio...Apocynum venetum/cotton blended fabrics have been subjected to treat with cationic polymer nanoparticles followed by dyeing with Acid Red B,and then studied for their dyeing performance and morphology.The investigation on the effect of modification factors on the blended fabrics indicated that the 0.5 g/L nanoparticles concentration,60 min treating time,60 ℃ treating temperature and pH 6-8 are the optimum modification process to improve the dyeability of acid dye.In addition,the SEM images show that nanoparticles can be adsorbed on the surface of modified A.venetum or cotton fibers,and the two different fibers could have the same adsorption ability to Acid Red B.展开更多
Fueled by the increasing imperative for sustainable energy solutions and the burgeoning emphasis on health awareness,self-powered techniques have undergone notable strides in advancement.Triboelectric nanogenerators(T...Fueled by the increasing imperative for sustainable energy solutions and the burgeoning emphasis on health awareness,self-powered techniques have undergone notable strides in advancement.Triboelectric nanogenerators(TENGs)stand out as a prominent device capitalizing on the principles of triboelectrification and electrostatic induction to generate electricity or electrical signals.In efforts to augment the electrical output performance of TENGs and broaden their range of applications,researchers have endeavored to refine materials,surface morphology,and structural design.Among them,physical morphological modifications play a pivotal role in enhancing the electrical properties of TENGs by increasing the contact surface area,which can be achieved by building micro-/nano-structures on the surface or inside the friction material.In this review,we summarize the common morphologies of TENGs,categorize the morphologies into surface and internal structures,and elucidate their roles in enhancing the electric output performance of devices.Moreover,we systematically classify the methodologies employed for morphological preparation into physical and chemical approaches,thereby furnishing a comprehensive survey of the diverse techniques.Subsequently,typical applications of TENGs with special morphology divided by energy harvesting and self-powered sensors are presented.Finally,an overview of the challenges and future trajectories pertinent to TENGs is conducted.Through this endeavor,the aim of this article is to catalyze the evolution of further strategies for enhancing performance of TENGs.展开更多
Extracorporeal membrane oxygenator(ECMO) has been in development for nearly 70 years, and the oxygenator has gone through several generations of optimizations, with advances from bubble oxygenators to membrane oxygena...Extracorporeal membrane oxygenator(ECMO) has been in development for nearly 70 years, and the oxygenator has gone through several generations of optimizations, with advances from bubble oxygenators to membrane oxygenators leading to more and more widespread use of ECMO. Membrane is the core of a ECMO system and the working mechanism of membrane oxygenator depends on the membrane material,from PDMS flat membrane to PMP hollow fiber membrane, which have experienced three generations.Blood compatibility on the surface of the membrane material is very vital, which directly determines the use duration of the oxygenator and can reduce the occurrence of complications. The mechanism of mass transfer is the basis of oxygenator operation and optimization. This review summarizes the membrane development history and preparation technology, modification approaches and mass transfer theory in the process of oxygen and blood exchange. We hoped that this review will provide more ideas for the study of gas blood exchange membrane.展开更多
The graft modification of N, N'-methylene-bisacrylamide (NNMBAA) onto silk using eerie ammonium sulfate, potassium persulfate, ammonium persulfate and 2, 2-azobis (isobutyronitrile) as the initiators has been stud...The graft modification of N, N'-methylene-bisacrylamide (NNMBAA) onto silk using eerie ammonium sulfate, potassium persulfate, ammonium persulfate and 2, 2-azobis (isobutyronitrile) as the initiators has been studied in the presence of air. To establish reaction conditions for the graft modification of NNMBAA onto silk, the effect of different variables such as the initiator concentration, monomer concentration, acetic acid concentration, time of polymerization, reaction temperature and liquor ratio (fabric: liq.) have been studied. The optimum grafting conditions were found. As evidence of grafting, analyses of amino acid composition and alkali solubility have been carried out. Grafting caused changes in amino acid composition and alkali solubility of silk. The observation has been explained in relation to structural changes in the grafted silk.展开更多
Developing high-performance electromagnetic interference(EMI)shielding materials and wearable EMI fabrics is significantly important for the integrated electronics and wearable electronic devices.Herein,we propose an ...Developing high-performance electromagnetic interference(EMI)shielding materials and wearable EMI fabrics is significantly important for the integrated electronics and wearable electronic devices.Herein,we propose an in-situ reduction strategy to construct a high-conductive silver/thermoplastic polyurethane nanofiber membrane(Ag/TPU NM).Benefiting from the intercrossed structure of TPU nanofibers and strong adsorption interaction of Ag+by the unsaturated aromatic hydrocarbons of TPU,in-situ reduced Ag nanoparticles(NPs)can be firmly semi-embedded on the TPU fibers,without needing of binders/crosslinkers in traditional methods,to form the three-dimensional(3D)continuous conductive network,and the resulting Ag/TPU NM exhibits high EMI shielding effectiveness of 95.7 dB,excellent Joule heating performance(202.6°C/V^(2))and stable environmental adaptability in high(120°C)and ultralow(-196°C)temperatures as well as corrosive solution.These outstanding performances are ascribed to the Ag-conductive networks semi-embedded on TPU formed by the in-situ reduction strategy,which protects Ag from oxidation and therefore achieves high-stability.Meanwhile,the inherent stretchable characteristic and intercrossed structure of TPU NM endow its excellent environmental adoptability at wide conditions.In short,combined with excellent flexibility and high air/moisture permeability,the as-synthesized Ag/TPU NM shows the great potential for applications in wearable EMI shielding protection fabrics in harsh conditions.展开更多
Plasma etching technique used in the modification of fibres,yarns and fabrics of wool is re-ported.The experimental results show that the method is useful for improving wettability and re-ducing shrinkage of wool,it m...Plasma etching technique used in the modification of fibres,yarns and fabrics of wool is re-ported.The experimental results show that the method is useful for improving wettability and re-ducing shrinkage of wool,it may be used to increase the strength of tops and yarns,and to enhancethe hand and colour of the final products.In addition,the characteristic features of the plasmamodified wool and discussions of possible mechanisms of the action are presented.展开更多
It has been found that there are marked errors in the value of valid opening size of heat-bonded nonwoven fabrics between theoretical calculations and engineering measurements. A new modified theoretical model is adva...It has been found that there are marked errors in the value of valid opening size of heat-bonded nonwoven fabrics between theoretical calculations and engineering measurements. A new modified theoretical model is advanced in this paper. The equivalent diameter of the pore of a fibre web is used to calculate the valid opening size instead of the maximum diameter of inscribed circle used, because the fibres in practical fibre webs are flexible elastomers with definite diameters and the pore of fibre web may produce deformation in screening teat and engineering usage. The results show that the theoretical calculations coincide well with the engineering measurements. This method offers a theoretical basis for computer simulation to the performance of filters of heatbonded nonwoven fabrics.展开更多
High-moisture regains nature of cellulosic fibers considered one of the critical drawbacks for jute-based applications. To minimize this by developing better interfacial adhesion, a hydrophobic nonwoven wet-laid glass...High-moisture regains nature of cellulosic fibers considered one of the critical drawbacks for jute-based applications. To minimize this by developing better interfacial adhesion, a hydrophobic nonwoven wet-laid glass fiber sheet used <span style="font-family:Verdana;">the</span><span style="font-family:Verdana;"> woven jute fabric in this experiment. For this purpose, woven jute fabric </span><span style="font-family:;" "=""><span style="font-family:Verdana;">wa</span><span style="font-family:Verdana;">s </span></span><span style="font-family:;" "=""><span style="font-family:Verdana;">categorized into untreated, silane, alkali, and alkali-silane combined treatment then compounded with the solution of polycaprolactone </span><span style="font-family:Verdana;">(PCL). Fabric</span></span><span style="font-family:Verdana;">ation of composites performed </span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">following sandwich method based on differ</span><span style="font-family:Verdana;">ent hot-pressing time </span></span><span style="font-family:Verdana;">with</span><span style="font-family:Verdana;"> temperature for detecting a prominent fabrication parameter. Surface treated jute fibers characterized using FTIR spectro</span><span style="font-family:;" "=""><span style="font-family:Verdana;">sco</span><span style="font-family:Verdana;">py. Hence, the mechanical and thermal properties of composites were investiga</span><span style="font-family:Verdana;">ted to find the consequence of chemical treatments into woven jute fabric. Alkali-silane combined chemical treatments resulting in improved 48.38% of tensile strength over untreated optimized composites. Scanning electron microscope (SEM) used for displaying interfacial adhesion between fiber and polymer matrix. Besides, further investigation demonstrated due to the combined chemical treatment of alkali-silane optimized composites significantly enhanced the thermogravimetric (TGA) stability in contrast to other composites.</span></span>展开更多
为解决玄武岩纤维难以着色的问题,先以自制水性聚氨酯阳离子改性剂对玄武岩织物进行改性,而后采用酸性染料对其进行染色,并优化了染色工艺。结果表明,经阳离子改性剂处理后,玄武岩织物的染色性能及力学性能得到了显著提升。Lanaset Red...为解决玄武岩纤维难以着色的问题,先以自制水性聚氨酯阳离子改性剂对玄武岩织物进行改性,而后采用酸性染料对其进行染色,并优化了染色工艺。结果表明,经阳离子改性剂处理后,玄武岩织物的染色性能及力学性能得到了显著提升。Lanaset Red 2B酸性染料对改性玄武岩织物的最优染色工艺为染液pH=5,染色温度70℃,保温时间40 min。该方法染色的玄武岩织物得色较深,强力损伤较小,耐摩擦、耐皂洗和耐日晒色牢度优良。展开更多
基金supported by the Science and Technology Planning Project of Guangdong Province(Nos.2024A0505040016 and 2023A0505050148)National Key Research and Development Project of China(2023YFB3809900/2023YFB3809902)Natural Science Foundation of Guangdong Province(No.2025A1515010026)。
文摘Biodegradable metals have garnered considerable interest owing to their capacity for self-degradation following the repair of damaged tissues.This review commences with their historical development and clarifies the essential prerequisites for their successful clinical translation.Subsequently,a detailed review of magnesium-based materials is presented from five critical areas of alloying,fabrication techniques,purification,surface modification,and structural design,systematically addressing their progress in biodegradation rate retardation,mechanical reinforcement,and biocompatibility enhancement.Furthermore,recent breakthroughs in vivo animal experiments and clinical translation of magnesium alloys are summarized.Finally,this review concludes with a critical assessment of the achievements and challenges encountered in the clinical application of these materials,and proposes practical strategies to address current limitations and guide future research perspectives.
基金the financial support from National Natural Science Foundation of China(Nos.22078125 and 52004102)Postdoctoral Science Foundation of China(No.2023M741472)。
文摘Surface modification of fabrics is an effective way to endow them with antifouling properties while still maintaining their key advantages such as comfort,softness and stretchability.Herein,an atmospheric pressure dielectric barrier discharge(DBD)plasma method is demonstrated for the processing of silk fabrics using 1H,1H,2H,2H-perfluorodecyltriethoxysilane(PFDS)as the precursor.The results showed the successful grafting of PFDS groups onto the surface of silk fabrics without causing damage.Meanwhile,the gas temperature is rather low during the whole processing procedure,suggesting the non-equilibrium characteristics of DBD plasma.The influence on fabrics of the processing parameters(PFDS concentration,plasma treatment time and plasma discharge power)was systematically investigated.An optimum processing condition was determined to be a PFDS concentration of 8wt%,a plasma processing time of 40 s and a plasma power of 11.87 W.However,with prolonged plasma processing time or enhanced plasma power,the plasma-grafted PFDS films could be degraded.Further study revealed that plasma processing of silk fabrics with PFDS would lead to a change in their chemical composition and surface roughness.As a result,the surface energy of the fabrics was reduced,accompanied by improved water and oil repellency as well as enhanced antifouling performance.Besides,the plasma-grafted PFDS films also had good durability and stability.By extending the method to polyester and wool against different oil-/water-based stains,the DBD plasma surface modification technique demonstrated good versatility in improving the antifouling properties of fabrics.This work provides guidance for the surface modification of fabrics using DBD plasma to confer them with desirable functionalities.
基金supported by the Key Research and Development Program of Hubei Province,China(No.2023BAB108)the Natural Science Foundation of Hubei Province,China(No.2022CFB096)the National Natural Science Foundation of China(Nos.22279093 and 22075216)。
文摘Lithium metal,with its exceptionally high theoretical capacity,emerges as the optimal anode choice for high-energy-density rechargeable batteries.Nevertheless,the practical application of lithium metal batteries(LMBs)is constrained by issues such as lithium dendrite growth and low Coulombic efficiency(CE).Herein,a roll-to-roll approach is adopted to prepare meter-scale,lithiophilic Sn-modified Cu mesh(Sn@Cu mesh)as the current collector for long-cycle lithium metal batteries.The two-dimensional(2D)nucleation mechanism on Sn@Cu mesh electrodes promotes a uniform Li flux,facilitating the deposition of Li metal in a large granular morphology.Simultaneously,experimental and computational analyses revealed that the distribution of the electric field in the Cu mesh skeleton induces Li inward growth,thereby generating a uniform,dense composite Li anode.Moreover,the Sn@Cu mesh-Li symmetrical cell demonstrates stable cycling for over 2000 h with an ultra-low 10 mV voltage polarization.In Li||Cu half-cells,the Sn@Cu mesh electrode demonstrates stable cycling for 100 cycles at a high areal capacity of 5 mAh·cm^(-2),achieving a CE of 99.2%.This study introduces a simple and large-scale approach for the production of lithiophilic three-dimensional(3D)current collectors,providing more possibilities for the scalable application of Li metal batteries.
基金supported by the National Natural Science Foundation of China (Nos. 21371069 and 21621001)
文摘Metal-organic frameworks（MOFs） are a unique class of porous crystalline materials that have shown promise for a wide range of applications. MOFs have been explored as a new type of heterogeneous catalytic materials, because of their high surface area, uniform and tunable pores, facile functionalization and incorporation of catalytic active sites. The use of multi-functional sites MOF materials as catalysts for synergistic catalysis and tandem reactions has attracted increasing attention. In this review, we aim to introduce the construction of bi-or multi-functional MOF catalysts with cooperative or cascade functions via post-synthetic modification（PSM）.
基金supported by National Natural Science Foundation of China(No.51173086)National Key Technology R&D Program,(Nos.2014BAC13B02 and 2014BAE01B01)+1 种基金Industrialization Projects of Major Independent Innovation Achievements of Shandong Province(No.2012ZHZX1A0914)Application Basis and Cutting-edge Technology Research Project of Tianjin(No.14JCZDJC37200)
文摘Apocynum venetum/cotton blended fabrics have been subjected to treat with cationic polymer nanoparticles followed by dyeing with Acid Red B,and then studied for their dyeing performance and morphology.The investigation on the effect of modification factors on the blended fabrics indicated that the 0.5 g/L nanoparticles concentration,60 min treating time,60 ℃ treating temperature and pH 6-8 are the optimum modification process to improve the dyeability of acid dye.In addition,the SEM images show that nanoparticles can be adsorbed on the surface of modified A.venetum or cotton fibers,and the two different fibers could have the same adsorption ability to Acid Red B.
基金financially supported by the Natural Science Foundation of Guangdong Province(No.2024A1515010639)PolyU Postdoc Matching Fund Scheme(No.1-W327),PolyU Grant(No.1-CE0H)+3 种基金Shenzhen Science and Technology Program(No.ZDSYS20220606100406016)Shenzhen Key Laboratory of Photonics and Biophotonics(No.ZDSYS20210623092006020)National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment(Shenzhen)(No.868-000003010103)National Natural Science Foundation of China(No.52208272)。
文摘Fueled by the increasing imperative for sustainable energy solutions and the burgeoning emphasis on health awareness,self-powered techniques have undergone notable strides in advancement.Triboelectric nanogenerators(TENGs)stand out as a prominent device capitalizing on the principles of triboelectrification and electrostatic induction to generate electricity or electrical signals.In efforts to augment the electrical output performance of TENGs and broaden their range of applications,researchers have endeavored to refine materials,surface morphology,and structural design.Among them,physical morphological modifications play a pivotal role in enhancing the electrical properties of TENGs by increasing the contact surface area,which can be achieved by building micro-/nano-structures on the surface or inside the friction material.In this review,we summarize the common morphologies of TENGs,categorize the morphologies into surface and internal structures,and elucidate their roles in enhancing the electric output performance of devices.Moreover,we systematically classify the methodologies employed for morphological preparation into physical and chemical approaches,thereby furnishing a comprehensive survey of the diverse techniques.Subsequently,typical applications of TENGs with special morphology divided by energy harvesting and self-powered sensors are presented.Finally,an overview of the challenges and future trajectories pertinent to TENGs is conducted.Through this endeavor,the aim of this article is to catalyze the evolution of further strategies for enhancing performance of TENGs.
基金financial support of the National Key Research and Development Program of China (2020YFC0862903)the National Natural Science Foundation of China (22078146)+1 种基金the Key Research and Development program of Jiangsu Province (BE2021022)the Natural Science Foundation of Jiangsu Province (BK20200091)。
文摘Extracorporeal membrane oxygenator(ECMO) has been in development for nearly 70 years, and the oxygenator has gone through several generations of optimizations, with advances from bubble oxygenators to membrane oxygenators leading to more and more widespread use of ECMO. Membrane is the core of a ECMO system and the working mechanism of membrane oxygenator depends on the membrane material,from PDMS flat membrane to PMP hollow fiber membrane, which have experienced three generations.Blood compatibility on the surface of the membrane material is very vital, which directly determines the use duration of the oxygenator and can reduce the occurrence of complications. The mechanism of mass transfer is the basis of oxygenator operation and optimization. This review summarizes the membrane development history and preparation technology, modification approaches and mass transfer theory in the process of oxygen and blood exchange. We hoped that this review will provide more ideas for the study of gas blood exchange membrane.
文摘The graft modification of N, N'-methylene-bisacrylamide (NNMBAA) onto silk using eerie ammonium sulfate, potassium persulfate, ammonium persulfate and 2, 2-azobis (isobutyronitrile) as the initiators has been studied in the presence of air. To establish reaction conditions for the graft modification of NNMBAA onto silk, the effect of different variables such as the initiator concentration, monomer concentration, acetic acid concentration, time of polymerization, reaction temperature and liquor ratio (fabric: liq.) have been studied. The optimum grafting conditions were found. As evidence of grafting, analyses of amino acid composition and alkali solubility have been carried out. Grafting caused changes in amino acid composition and alkali solubility of silk. The observation has been explained in relation to structural changes in the grafted silk.
基金supported by the Fundamental Research Funds for the Central Universities(No.buctrc202213)XinChen Technologies Co.Ltd.for the measurements of electromagnetic parameters.
文摘Developing high-performance electromagnetic interference(EMI)shielding materials and wearable EMI fabrics is significantly important for the integrated electronics and wearable electronic devices.Herein,we propose an in-situ reduction strategy to construct a high-conductive silver/thermoplastic polyurethane nanofiber membrane(Ag/TPU NM).Benefiting from the intercrossed structure of TPU nanofibers and strong adsorption interaction of Ag+by the unsaturated aromatic hydrocarbons of TPU,in-situ reduced Ag nanoparticles(NPs)can be firmly semi-embedded on the TPU fibers,without needing of binders/crosslinkers in traditional methods,to form the three-dimensional(3D)continuous conductive network,and the resulting Ag/TPU NM exhibits high EMI shielding effectiveness of 95.7 dB,excellent Joule heating performance(202.6°C/V^(2))and stable environmental adaptability in high(120°C)and ultralow(-196°C)temperatures as well as corrosive solution.These outstanding performances are ascribed to the Ag-conductive networks semi-embedded on TPU formed by the in-situ reduction strategy,which protects Ag from oxidation and therefore achieves high-stability.Meanwhile,the inherent stretchable characteristic and intercrossed structure of TPU NM endow its excellent environmental adoptability at wide conditions.In short,combined with excellent flexibility and high air/moisture permeability,the as-synthesized Ag/TPU NM shows the great potential for applications in wearable EMI shielding protection fabrics in harsh conditions.
文摘Plasma etching technique used in the modification of fibres,yarns and fabrics of wool is re-ported.The experimental results show that the method is useful for improving wettability and re-ducing shrinkage of wool,it may be used to increase the strength of tops and yarns,and to enhancethe hand and colour of the final products.In addition,the characteristic features of the plasmamodified wool and discussions of possible mechanisms of the action are presented.
文摘It has been found that there are marked errors in the value of valid opening size of heat-bonded nonwoven fabrics between theoretical calculations and engineering measurements. A new modified theoretical model is advanced in this paper. The equivalent diameter of the pore of a fibre web is used to calculate the valid opening size instead of the maximum diameter of inscribed circle used, because the fibres in practical fibre webs are flexible elastomers with definite diameters and the pore of fibre web may produce deformation in screening teat and engineering usage. The results show that the theoretical calculations coincide well with the engineering measurements. This method offers a theoretical basis for computer simulation to the performance of filters of heatbonded nonwoven fabrics.
文摘High-moisture regains nature of cellulosic fibers considered one of the critical drawbacks for jute-based applications. To minimize this by developing better interfacial adhesion, a hydrophobic nonwoven wet-laid glass fiber sheet used <span style="font-family:Verdana;">the</span><span style="font-family:Verdana;"> woven jute fabric in this experiment. For this purpose, woven jute fabric </span><span style="font-family:;" "=""><span style="font-family:Verdana;">wa</span><span style="font-family:Verdana;">s </span></span><span style="font-family:;" "=""><span style="font-family:Verdana;">categorized into untreated, silane, alkali, and alkali-silane combined treatment then compounded with the solution of polycaprolactone </span><span style="font-family:Verdana;">(PCL). Fabric</span></span><span style="font-family:Verdana;">ation of composites performed </span><span style="font-family:Verdana;">the </span><span style="font-family:;" "=""><span style="font-family:Verdana;">following sandwich method based on differ</span><span style="font-family:Verdana;">ent hot-pressing time </span></span><span style="font-family:Verdana;">with</span><span style="font-family:Verdana;"> temperature for detecting a prominent fabrication parameter. Surface treated jute fibers characterized using FTIR spectro</span><span style="font-family:;" "=""><span style="font-family:Verdana;">sco</span><span style="font-family:Verdana;">py. Hence, the mechanical and thermal properties of composites were investiga</span><span style="font-family:Verdana;">ted to find the consequence of chemical treatments into woven jute fabric. Alkali-silane combined chemical treatments resulting in improved 48.38% of tensile strength over untreated optimized composites. Scanning electron microscope (SEM) used for displaying interfacial adhesion between fiber and polymer matrix. Besides, further investigation demonstrated due to the combined chemical treatment of alkali-silane optimized composites significantly enhanced the thermogravimetric (TGA) stability in contrast to other composites.</span></span>
文摘为解决玄武岩纤维难以着色的问题,先以自制水性聚氨酯阳离子改性剂对玄武岩织物进行改性,而后采用酸性染料对其进行染色,并优化了染色工艺。结果表明,经阳离子改性剂处理后,玄武岩织物的染色性能及力学性能得到了显著提升。Lanaset Red 2B酸性染料对改性玄武岩织物的最优染色工艺为染液pH=5,染色温度70℃,保温时间40 min。该方法染色的玄武岩织物得色较深,强力损伤较小,耐摩擦、耐皂洗和耐日晒色牢度优良。
