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Fibrous Aerogels with Tunable Superwettability for High-Performance Solar-Driven Interfacial Evaporation

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Nano-Micro Letters 2023年第5期15卷 51-68页

作者： Chengjian Xu Mengyue Gao Xiaoxiao Yu Junyan Zhang Yanhua Cheng meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China

Solar-driven interfacial evaporation is an emerging technology for water ***,double-layered structure with separate surface wettability properties is usually employed for evaporator ***,creating materials with tunable properties is a great challenge because the wettability of existing materials is usually ***,we report vinyltrimethoxysilane as a single molecular unit to hybrid with bacterial cellulose(BC)fibrous network,which can be built into robust aerogel with entirely distinct wettability through controlling assembly *** groups or carbon atoms are exposed on the surface of BC nanofibers,resulting in either superhydrophilic or superhydrophobic *** this special property,single component-modified aerogels could be integrated into a double-layered evaporator for water *** 1 sun,our evaporator achieves high water evaporation rates of 1.91 and 4.20 kg m^(-2)h^(-1)under laboratory and outdoor solar conditions,***,this aerogel evaporator shows unprecedented lightweight,structural robustness,long-term stability under extreme conditions,and excellent salt-resistance,highlighting the advantages in synthesis of aerogel materials from the single molecular unit.

关键词： Cellulose aerogel Tunable wettability Thermal insulation Robust interface Solar vapor generation

THE TEMPERATURE DEPENDENCE OF THE PHOTOCONDUCTIVITY IN a-Si:H/a-SiNx:H SUPERLATTICES

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Chinese Physics Letters 1989年第9期6卷 405-408页

作者： zhu meifang SONG Jun LI Chenxi Department of Physics Graduate SchoolAcademia SinicaBeijing Institute of Physics Academia SinicaBeijing

The temperature dependence of the photoconductivity σp(T) in a-Si:H/a-SiNx:H superlattices does not decrease with temperature decreasing in the range of 120-25OK,but it is temperature independent showing a wide plateau of photoconductivity Op in the superlattices with thickness of a-Si:H layer ds*=12 and *** plateau of ap(T)depends on the light *** type of interface state as sensitizing centre was *** parameters of the sensitizing centre were determined by using computer fitting of ap(T).The computed results are the same with the experimental data.

关键词： centre SUPER plateau

Tough,conductive hydrogels with double-network based on hydrophilic polymer assistant well-dispersed carbon nanotube for innovative force sensor

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Science China(Technological Sciences) 2022年第5期65卷 1160-1168页

作者： CHEN GuoYin GUO Ying HSIAO S.Benjamin HOU Kai zhu meifang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Department of Chemistry Stony Brook UniversityNew York11794USA

In recent years,conductive hydrogels have become a promising candidate for application in fields such as tissue engineering and flexible electronic devices because of their conductivity,soft and wet ***,the preparation of tough and uniformly conductive hydrogels remains challenging because conductive nanofillers tend to aggregate during hydrogel ***,a hydrophilic polymer assistant dispersion strategy is proposed to fabricate a tough,conductive composite hydrogel with doublenetwork based on well-dispersed carbon nanotubes(CNTs).In particular,A@T_(2.0)/polyacrylamide(PAM)hydrogels showed a tensile strength of 332.9 kPa,elongation of 584.6%,Young’s modulus of 91.5 kPa,and conductivity of 2.765 S m^(-1),and a demonstration was performed to show the strain sensing for health monitoring and *** showed that the fabricated conductive hydrogels offer promising and broad insights in the field of wearable sensors for health monitoring,innovative electronics,and human-machine interactions.

关键词： alginate carbon nanotubes conductive hydrogel tough force sensing

Flexible Ceramic Fibers: Recent Development in Preparation and Application

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Advanced Fiber Materials 2022年第4期4卷 573-603页

作者： Chao Jia Zhe Xu Dianfeng Luo Hengxue Xiang meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Flexible ceramic fibers(FCFs)have been developed for various advanced applications due to their superior mechanical flexibility,high temperature resistance,and excellent chemical *** this article,we present an overview on the recent progress of FCFs in terms of materials,fabrication methods,and *** begin with a brief introduction to FCFs and the materials for preparation of *** that,various methods for preparation of FCFs are discussed,including centrifugal spinning,electrospinning,solution blow spinning,self-assembly,chemical vapor deposition,atomic layer deposition,and polymer *** applications of FCFs in various fields are further illustrated in detail,including thermal insulation,air filtration,water treatment,sound absorption,electromagnetic wave absorption,battery separator,catalytic application,among ***,some perspectives on the future directions and opportunities for the preparation and application of FCFs are *** envision that this review will provide readers with some meaningful guidance on the preparation of FCFs and inspire them to explore more potential applications.

关键词： Ceramic fibers Flexibility Preparation Applications

Progress and Perspective of Antiviral Protective Material

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Advanced Fiber Materials 2020年第3期2卷 123-139页

作者： Jialiang Zhou Zexu Hu Fatemeh Zabihi Zhigang Chen meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low‑Dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Public health events caused by viruses pose a significant risk to humans *** December 2019 till now,the rampant novel 2019 coronavirus(SAR-CoV-2)has hugely impacted China and over *** a commendable means of protection,mask technology is relatively mature,though most of the masks cannot effectively resist the viral *** key material of the mask is a non-woven material,which makes the barrier of virus through *** to the lack of the ability to kill the viruses,masks are prone to cross-infection and become an additional source of infection after being *** the filteration and antiviral effects can be simultaneously integrated into the mask,it will be more effcient,work for a longer time and create less difficulty in *** mini-review presents the advances in antiviral materials,different mechanisms of their activity,and their potential applications in personal protective ***,the article addresses the future challenges and directions of mask technology.

关键词： Protective material Antiviral Fiber Nanotechnology

Intriguing anti-superbug Cu2O@ZrP hybrid nanosheet with enhanced antibacterial performance and weak cytotoxicity

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Nano Research 2019年第6期12卷 1453-1460页

作者： Jialiang Zhou Hengxue Xiang Fatemeh Zabihi Senlong Yu Bin Sun meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China

In view of it's strong antibacterial function and minor toxicity,cuprous oxide (Cu2O) is frequently used in various broad-spectrum antibacterial *** the undesirable effects of superbugs still remain *** this research,a chemical deposition approach is used to prepare a Cu2O@ZrP composite with nanosheet configuration demonstrating excellent dispersibility and antibacterial *** systematic analysis,it was inffered that the content of copper in the nanosheet was about 57-188 mg/g while the average thickness of the nanosheets Cu2O formed on ZrP is approximately 0.8 *** results of the minimal inhibitory concentration (MIC) revealed that an extremely low loading of Cu2O in Cu2O@ZrP nanosheet can lead to exceptional antibacterial *** on two various superbugs;***-resistant staphylococcus aureus (MRSA) and vancomycin-resistant enterococcus (VRE),the composite nanosheet reagent performed over 99% microbial *** intesetingly,the cell growth rate of the Cu2O@ZrP nanosheet was determined to be 20% lower than that of the neat Cu2O,manifesting a weaker *** unique hybrid nanosheet with intriguing anti-superbug performance promises highly efficient protection for the fabrics,battledress,and medical textiles.

关键词： superbug Cu2O ZrP nanosheet antibacterial activitycy totoxicity

Supertough spontaneously self-healing polymer based on septuple dynamic bonds integrated in one chemical group

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Science China Chemistry 2022年第2期65卷 363-372页

作者： Luzhi Zhang Qingbao Guan Ao Shen Rasoul Esmaeely Neisiany Zhengwei You meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials(Donghua University)College of Materials Science and EngineeringShanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineInstitute of Functional MaterialsDonghua UniversityResearch Base of Textile Materials for Flexible Electronics and Biomedical ApplicationsChina Textile Engineering SocietyShanghai 201620China Department of Materials and Polymer Engineering Hakim Sabzevari UniversitySabzevar ***Iran

The development of spontaneously self-healing materials with excellent mechanical properties remains a formidable challenge despite the extensive interest in such *** is because the self-healing and mechanical properties of a material are usually optimized via contradictory *** present study demonstrated a supertough spontaneously self-healing polymer,Fe-(2,6-diacetylpyridine dioxime)-urethane-based polyurethane(Fe-PPOU)based on septuple dynamic bonds integrated in one chemical group.A synergistic effect was induced by the presence of multiple dynamic crosslinking points,which comprised the integrated dynamic interactions,and the hidden lengths of the folded polymeric chains in ***,the mechanical and self-healing properties of the polymer were simultaneously ***-PPOU demonstrated the highest reported toughness(139.8 MJ m^(-3))among all the room-temperature spontaneously self-healing polymers with a nearly 100%healing ***-PPOU exhibited instant(30 s)self-healing to reach a strength of 1.6 MPa that was higher than the original strength of numerous recently reported self-healing polymers.

关键词： oxime-urethane bonds hydrogen bonds metal-coordination bonds 2 6-diacetylpyridine dioxime self-healing

Recyclable Joule heated low shrinkage carbon nanofiber aerogels for microscale oil/water separation

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Journal of Materials Science & Technology 2022年第32期127卷 89-97页

作者： Guangkai Hu Dong Liu Sidi Yin Bin Yu Tao Huang Hao Yu meifang zhu State Key Laboratory for Modification of Chemical Fibers&Polymer Materials College of Materials Science&EngineeringDonghua UniversityShanghai 201620China

Aerogels have shown great potential as oil adsorbents but their application to the removal of microscale oil from water and their recycling remains *** present work proposed a freeze-shaping method for fabricating carbon nanofiber aerogels(CNFAs)based on the direct use of one-dimensional(1D)carbon nanofibers(CNF)rather than carbonization of polymer *** technique greatly reduces volume shrinkage and increases the three-dimensional(3D)structural stability of the *** nanotubes(CNT)and gelatinized starch were incorporated in these aerogels as a conductive enhancement agent and binder,respectively,forming a“vine(CNT)-wrapped tree(CNF)”structure that improved mechanical and Joule-heating *** effects of glutaraldehyde added to aerogels as a crosslinking agent on mechanical properties and microstructure were also systematically *** optimized CNFAs combined with low density,high porosity,good elasticity,and superior Joule-heating efficiency along with suitable adsorption capacity,excellent selectivity,and cycling *** material was able to selectively remove 87%and 92%of microscale acetone and dimethylformamide(DMF),respectively,from the water after nine cycles of adsorption and *** present work demonstrates a novel means of designing and fabricating a low shrinkage CNFA with outstanding Joule-heating performance having potential practical applications in the remediation of organic pollution.

关键词： Electrospinning Carbon nanofiber aerogel Volume shrinkage Joule-heating Chemical oxygen demand

High thermal stability Cu_(2)O@OZrP micro-nano hybrids for melt-spun excellent antibacterial activity polyester fibers

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Journal of Materials Science & Technology 2021年第22期81卷 58-66页

作者： Jialiang Zhou Yaping Wang Weinan Pan Hengxue Xiang Peng Li Zhe Zhou meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical UniversityXi'an710072China

Public safety incidents caused by bacterial infections have attracted widespread attention towards antibacterial textiles(fibers,fabrics,etc.).Nevertheless,it is still challenging to efficiently load inorganic nano-antibacterial materials in polymer *** this work,zirconium phosphate(ZrP,layered micro-nano materials)was utilized as a micro-nano *** octadecyl triphenyl phosphonium bromide(OTP)was intercalated between the ZrP sheets by the ion exchange method to improve the carrier-polymer compatibility and the antibacterial *** in-situ chemical reduction,the ultra-small nano-sized cuprous oxide(Cu_(2)O<5 nm)was loaded on the outer surface of ZrP to realize the uniform and stable dispersion of the Cu_(2)O on the carrier and improve the antibacterial *** ZrP nanosheets loaded with Cu_(2)O and OTP(Cu_(2)O@OZrP)had excellent antibacterial properties,and the antibacterial rate against ***,*** and *** was more than 99%.The intercalation amount of OTP in Cu_(2)O@OZrP can reach 16%,and the thermal stability was excellent and a significant increase in the Zeta ***,the decomposition temperature was greater than 350℃,which was suitable for high-temperature melt processing of ***,we prepared PET/Cu_(2)O@OZrP fibers using polyethylene glycol terephthalate(PET),which accounts for 70%of the total chemical fibers,as the fiber ***/Cu_(2)O@OZrP fibers exhibited excellent mechanical property and antibacterial performance when the content of Cu_(2)O@OZrP was only 0.2%.The antibacterial rate against five types of bacteria including super bacteria(MRSA,VRE)was more than 99%.

关键词： Cu_(2)O@OZrP Hybrid material OTP Fibers Antibacterial