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多功能热电织物用于可穿戴无线传感系统

Engineering 2024年第4期35卷 158-167页

作者： Xinyang He Jiaxin Cai Mingyuan Liu Xuepeng Ni Wendi Liu Hanyu Guo jianyong yu Liming Wang Xiaohong Qin Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Flexible thermoelectric materials play an important role in smart wearables,such as wearable power generation,self-powered sensing,and personal thermal management.However,with the rapid development of Internet of Things(IoT)and artificial intelligence(AI),higher standards for comfort,multifunctionality,and sustainable operation of wearable electronics have been proposed,and it remains challenging to meet all the requirements of currently reported thermoelectric devices.Herein,we present a multifunctional,wearable,and wireless sensing system based on a thermoelectric knitted fabric with over 600 mm·s^(-1)air permeability and a stretchability of 120%.The device coupled with a wireless transmission system realizes self-powered monitoring of human respiration through an mobile phone application(APP).Furthermore,an integrated thermoelectric system was designed to combine photothermal conversion and passive radiative cooling,enabling the characteristics of being powered by solar-driven in-plane temperature differences and monitoring outdoor sunlight intensity through the APP.Additionally,we decoupled the complex signals of resistance and thermal voltage during deformation under solar irradiation based on the anisotropy of the knitted fabrics to enable the device to monitor and optimize the outdoor physical activity of the athlete via the APP.This novel thermoelectric fabricbased wearable and wireless sensing platform has promising applications in next-generation smart textiles.

关键词： Thermoelectric fabrics Wearable device Wireless Multifunctional sensing system Outdoor wearable signal monitoring

Semi-template based,biomimetic-architectured,and mechanically robust ceramic nanofibrous aerogels for thermal insulation

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Nano Research 2022年第6期15卷 5581-5589页

作者： Lvye Dou Yang Si jianyong yu Bin Ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 200051China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Energy efficient buildings require novel thermal insulators accompanied by lightweight,mechanically robust,fire resistant,and low thermal conductivity.Ceramic fibrous aerogels have emerged as promising candidates,however it’s difficult for these materials to achieve exceptional mechanical and thermal insulation performance simultaneously.Here,we demonstrate a unique semi-template method to fabricate biomimetic-architectured silica/carbon dual-fibrous aerogel with robust mechanical performance.Specifically,aerogels with honeycomb-like cellular and nanofiber/nanonet cell wall were constructed by freezedrying the homogeneous dispersion of SiO_(2)nanofibers and cellulose nanofibers co-suspensions.It is worth noting that the biomimetic structure has been perfectly inherited even subjected to high-temperature carbonization.As a result,the excellent structural stability brought by the novel structure enables the aerogel to completely recover under large compression and buckling strain of 80%,and exhibit robust fatigue resistance over 200,000 cycles.More importantly,the aerogels exhibit ultralow thermal conductivity(0.023 W·m^(−1)·K^(−1)),superior flame retardancy,together with excellent thermal insulation performance over a wide temperature ranging from−196 to 350°C.The fabrication of such materials may provide new ideas for the development of next-generation thermal insulators for harsh conditions.

关键词： silica nanofiber carbon nanonet biomimetic-architectured aerogel mechanically robust thermal insulation

From 1D Nanofibers to 3D Nanofibrous Aerogels: A Marvellous Evolution of Electrospun SiO_(2) Nanofibers for Emerging Applications

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Nano-Micro Letters 2022年第12期14卷 40-78页

作者： Cheng Liu Sai Wang Ni Wang jianyong yu Yi-Tao Liu Bin Ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620People’s Republic of China

One-dimensional(1D)SiO_(2) nanofibers(SNFs),one of the most popular inorganic nanomaterials,have aroused widespread attention because of their excellent chemical stability,as well as unique optical and thermal characteristics.Electrospinning is a straightforward and versatile method to prepare 1D SNFs with programmable structures,manageable dimensions,and modifiable properties,which hold great potential in many cutting-edge applications including aerospace,nanodevice,and energy.In this review,substantial advances in the structural design,controllable synthesis,and multifunctional applications of electrospun SNFs are highlighted.We begin with a brief introduction to the fundamental principles,available raw materials,and typical apparatus of electrospun SNFs.We then discuss the strategies for preparing SNFs with diverse structures in detail,especially stressing the newly emerging three-dimensional SiO_(2) nanofibrous aerogels.We continue with focus on major breakthroughs about brittleness-to-flexibility transition of SNFs and the means to achieve their mechanical reinforcement.In addition,we showcase recent applications enabled by electrospun SNFs,with particular emphasis on physical protection,health care and water treatment.In the end,we summarize this review and provide some perspectives on the future development direction of electrospun SNFs.

关键词： SiO_(2)nanofibers Nanofibrous aerogels Structural design Mechanical reinforcement Multifunctional applications

A General Strategy to Electrospin Nanofibers with Ultrahigh Molecular Chain Orientation

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Engineering 2023年第10期29卷 179-187页

作者： Xian Wen Jian Xiong Zhaoyang Sun Liming Wang jianyong yu Xiaohong Qin Key Laboratory of Textile Science and Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

The degree of polymer chain orientation is a key structural parameter that determines the mechanical and physical properties of fibers.However,understanding and significantly tuning the orientation of fiber macromolecular chains remain elusive.Herein,we propose a novel electrospinning technique that can efficiently modulate molecular chain orientation by controlling the electric field.In contrast to the typical electrospinning method,this technique can piecewise control the electric field by applying high voltage to the metal ring instead of the needle.Benefiting from this change,a new electric field distribution can be realized,leading to a non-monotonic change in the drafting force.As a result,the macromolecular chain orientation of polyethylene oxide(PEO)nanofibers was significantly improved with a recordhigh infrared dichroic ratio.This was further confirmed by the sharp decrease in the PEO jet fineness of approximately 80%and the nanofiber diameter from 298 to 114 nm.Interestingly,the crystallinity can also be adjusted,with an obvious drop from 74.9%to 31.7%,which is different from the high crystallinity caused by oriented chains in common materials.This work guides a new perspective for the preparation of advanced electrospun nanofibers with optimal orientation–crystallinity properties,a merited feature for various applications.

关键词： Molecular orientation Electrospinning Nanofibers Electric field Polyethylene oxide

A Rapid-Ab/Desorption and Portable Photothermal MIL- 101(Cr) Nanofibrous Composite Membrane Fabricated by Spray-Electrospinning for Atmosphere Water Harvesting

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Energy & Environmental Materials 2023年第1期6卷 111-118页

作者： Ailin Li Jian Xiong Ye Liu Liming Wang Xiaohong Qin jianyong yu Key Laboratory of Textile Science and Technology of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

MIL-101(Cr)is a promising moisture absorbent for solar-driven water harvesting from moisture to tackle the worldwide water shortage issue.However,the MIL-101(Cr)powder suffers from a long ab/desorption cycle due to the crystal aggregation caused by its inherent powder properties.Here,we demonstrate a MIL-101(Cr)nanofibrous composite membrane with a nanofibrous matrix where MIL-101(Cr)is monodisperse in the 3D porous nanofibrous matrix through a simple spray-electrospinning strategy.The continuous porous nanofibrous matrix not only offers sufficient sites for MIL-101(Cr)loading but also provides rapid moisture transport channels,resulting in a super-rapid ab/desorption duration of 50 min(including an absorption process for 40 min and a desorption process for 10 min)and multicycle daily water production of 15.9 L kg^(−1) d^(−1).Besides,the MIL-101(Cr)nanofibrous composite membrane establishes a high solar absorption of 92.8%,and excellent photothermal conversion with the surface temperature of 70.7°C under one-sun irradiation.In addition,the MIL-101(Cr)nanofibrous composite membrane shows excellent potential for practical application due to its flexibility,portability,and use stability.This work provides a new perspective of shortening MOF ab/desorption duration by introducing a porous nanofibrous matrix to improve the specific water production for the solar-driven ab/desorption water harvesting technique.

关键词： electrospinning fast vapor transport MIL-101(Cr) MOF composite membrane solar-driven moisture harvesting

Smart Fibers for Self‑Powered Electronic Skins

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Advanced Fiber Materials 2023年第2期5卷 401-428页

作者： Xiaoshuang Lv Yang Liu jianyong yu Zhaoling Li Bin Ding Shanghai Frontier Science Research Center for Modern Textiles College of TextilesDonghua UniversityShanghai 201620China College of Information Science and Technology Donghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China

Smart fibers are considered as promising materials for the fabrication of wearable electronic skins owing to their features such as superior flexibility,light weight,high specific area,and ease of modification.Besides,piezoelectric or triboelectric electronic skins can respond to mechanical stimulation and directly convert the mechanical energy into electrical power for self-use,thereby providing an attractive method for tactile sensing and motion perception.The incorporation of sensing capabilities into smart fibers could be a powerful approach to the development of self-powered electronic skins.Herein,we review several aspects of the recent advancements in the development of self-powered electronic skins constructed with smart fibers.The summarized aspects include functional material selection,structural design,pressure sensing mechanism,and proof-to-concept demonstration to practical application.In particular,various fabrication strategies and a wide range of practical applications have been systematically introduced.Finally,a critical assessment of the challenges and promising perspectives for the development of fiber-based electronic skins has been presented.

关键词： Smart fibers Electronic skins Self-power Piezoelectric effect Triboelectric effect

Reconfiguration and self-healing integrated Janus electrospinning nanofiber membranes for durable seawater desalination

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Nano Research 2023年第1期16卷 489-495页

作者： Huijie Liu Jiatai Gu Ye Liu Lei Yang Liming Wang jianyong yu Xiaohong Qin Key Laboratory of Textile Science&Technology of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials International Joint Laboratory for Advanced Fiber and Lowdimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Janus electrospinning nanofiber membranes have attracted extensive attention in the fields such as solar-driven interfacial desalination,liquid filtration,and waterproof and breathable fabrics.However,the Janus structures suffer from weak interfacial bonding and vulnerability to damage,making the durability and sustainability are highly sought after in real-word applications.Herein,we fabricate the simply reconfigurable and entirely self-healing Janus evaporator by electrospinning polypropylene glycol based polyurethane(PPG@PU)and polydimethylsiloxane based polyurethane-CNTs(PDMS@PU-CNTs)with different wettability,which are both designed based on dynamic Diels–Alder(DA)bond.The interface of the Janus membrane is stitched by the covalent bonds to directly improve the interface adhesion to 22 N·m−1,constructing an integrated evaporator,and thereby achieving a stable desalination rate of 1.34 kg·m−2·h−1 under one sun.Reversible dissociation of DA networks allows the evaporators for self-healing and reconfiguration abilities,after which the photothermal performance is maintained.This is the first work for the crosslinked self-healing polymer to be directly electrospun,achieving the improved interfacial bond and reconfiguration of entire evaporators,which presented promising new design principles and materials for interfacial solar seawater desalination.

关键词： Janus nanofiber membrane electrospinning interfacial bonding solar steam generation seawater desalination

Smart Interfacing between Co-Fe Layered Double Hydroxide and Graphitic Carbon Nitride for High-efficiency Electrocatalytic Nitrogen Reduction

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Energy & Environmental Materials 2023年第2期6卷 62-69页

作者： Xiaohui Wu Lu Tang Yang Si Chunlan Ma Peng Zhang jianyong yu Yitao Liu Bin Ding Key Laboratory of High Performance Fibers&Products(Ministry of Education) College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou 215009China State Center for International Cooperation on Designer Low-carbon&Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

Bimetallic compounds such as hydrotalcite-type layered double hydroxides(LDHs)are promising electrocatalysts owing to their unique electronic structures.However,their abilities toward nitrogen adsorption and reduction are undermined since the surface-mantled,electronegative-OH groups hinder the charge transfer between transition metal atoms and nitrogen molecules.Herein,a smart interfacing strategy is proposed to construct a coupled heterointerface between LDH and 2D g-C_(3)N_(4),which is proven by density functional theory(DFT)investigations to be favorable for nitrogen adsorption and ammonia desorption compared with neat LDH surface.The interfaced LDH and g-C_(3)N_(4) is further hybridized with a self-standing TiO_(2) nanofibrous membrane(NM)to maximize the interfacial effect owing to its high porosity and large surface area.Profited from the synergistic superiorities of the three components,the LDH@C_(3)N_(4)@TiO_(2) NM delivers superior ammonia yield(2.07×10^(−9) mol s^(−1) cm^(−2))and Faradaic efficiency(25.3%),making it a high-efficiency,noble-metal-free catalyst system toward electrocatalytic nitrogen reduction.

关键词： density functional theory electrocatalytic nitrogen reduction graphitic carbon nitride interface engineering layered double hydroxide

Transformation of Fibrous Membranes from Opaque to Transparent under Mechanical Pressing

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Engineering 2022年第12期19卷 84-92页

作者： Chao Wang Jing Zhao Liu Liu Peng Zhang Xianfeng Wang jianyong yu Bin Ding State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 200051China State Center for International Cooperation on Designer Low-carbon and Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China

There is a great demand for transparent films,membranes,or substrates in the fields of intelligent wearables,electronic skins,air filtration,and tissue engineering.Traditional materials such as glass and plastics cannot satisfy these requirements because of the lack of interconnected pores,undesirable porosity,and flexibility.Electrospun fibrous membranes offset these shortcomings because they contain small pores and have high porosity as well as outstanding flexibility.Thus,the development of transparent electrospun fibrous membranes is of great value.This work reports a simple and effective way to develop flexible and porous transparent fibrous membranes(TFMs)directly from electrospun fibrous membranes via mechanical pressing,without employing any other additives.In addition,the relationship between the transparency performance and the molecular structure of the polymers after pressing was summarized for the first time.After mechanical pressing,the membranes maintained fibrous morphology,micron-sized pores,and desired porosity.Polystyrene fibrous membranes,which exhibited excellent optical and mechanical properties,were used as a reference.The TFMs possessed high transparency(~89%visible light transmittance at 550 nm),high porosity(10%–30%),and strong mechanical tensile strength(~148 MPa),nearly 78 times that of the pristine electrospun fibrous membranes.Moreover,this study demonstrated that transparent and conductive membranes can be fabricated based on TFMs using vacuum-assisted filtration of silver nanowires followed by mechanical pressing.Compared with indium tin oxide films,conductive TFMs exhibited good electrical conductivities(9Ωper square(Ω·sq^(−1)),78%transmittance at 550 nm)and notable mechanical performance(to bear abundant bending stresses).

关键词： Transparent Electrospun fibrous membranes Porous structure Mechanical pressing Conductivity