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Nanofiber-based transparent film with controllable optical transparency adjustment function for versatile bionic applications

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Nano Research 2022年第1期15卷 564-572页

作者： Wen Wang Shuang Wang Chenxue Xiang Dan Xue Mufang Li Qiongzhen Liu Longhai Piao Dong Wang College of Materials Science and Engineering Hubei Key Laboratory of Advanced Textile Materials&ApplicationWuhan Textile UniversityWuhan 430200China College of Chemistry Chemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Department of Chemistry Kongju National UniversityChungna 32588Republic of Korea

As a new favorite in the field of smart materials,smart windows,with visual stimulus sensing functions,have attracted extensive attention for their high transparency,sensitive response to environmental stimulus,and reversible changes in light transmittance.In this paper,the PVA-coPE nanofiber film,which was completely opaque like paper,was used as filling phase and reacted with water-soluble N-vinyl-2-pyrrolidone(NVP)by photopolymerization to produce a flexible transparency polyvinyl pyrrolidone/spraying PVA-co-PE nanofiber films(PVP/SPNFs)composite film.Among them,the small size effect of PVA-coPE nanofibers played a pivotal role in improving the film's transparency.Nevertheless,the PVP's reversible adsorption-desorption behavior of water molecules made its refractive index change dynamically and reversibly,which led to the visual transition of composite film from transparent to opaque just like that of electronic smart windows.Additionally,the reversible transition rate of film's transparency can be effectively regulated by the nanofiber stack structure.This new design of transparency visualization transforms composite film in response to humidity,innovates the electrically controlled smart windows on energy and realizes the effective utilization of natural resources such as water and humidity,which has a great application prospect in the field of flexible optoelectronic devices,intelligent buildings,and smart writing.

关键词： transparent film controllable regulation refractive index stimuli-responsive reversible transition

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Smart Multiple Wetting Control on ZnO Coated Shape Memory Polymer Arrays

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Chemical Research in Chinese Universities 2023年第1期39卷 151-158页

作者： WANG Xiaonan WANG Bohan LAI Hua CHENG Zhongjun State Key Laboratory of Urban Water Resource&Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin150001P.R.China

Recently,surfaces with intelligent wetting controllability have aroused increased attention.Endowing the surface with stimuli-responsive surface chemistry and tunable surface microstructure can achieve a surface with smart wetting performances.However,almost all existing surfaces only focused on single surface chemistry or micromorphology,thus to achieve smart multiple wetting regulation is still difficult.Herein,we report a ZnO coated shape memory polymer(SMP)surface,and the surface chemistry and micromorphology can be synergistically regulated.ZnO can provide adjustable surface chemistry under UV irradiation,and SMP can offer tunable micromorphology due to its shape memory effect(SME).Based on the combined effect between the above two features,surface wetting performance can be smartly regulated among multiple states.Moreover,due to the excellent controllability of the surface,the application in directional droplet transportation was also demonstrated.This paper offers a new surface with tunability in both surface chemistry and micromorphology,and given the excellent wetting controllability,the surface is believed to be applied in a lot of fields,such as droplet manipulation,fluidic devices and selective catalysis.

关键词： Wetting control Shape memory polymer ZnO reversible transition

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光致变色偶氮纤维素衍生物的合成、表征和性能研究

光致变色偶氮纤维素衍生物的合成、表征和性能研究

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2012年全国高分子材料科学与工程研讨会

作者：张冬李志军刘海清福建师范大学材料科学与工程学院

＜正＞纤维素是地球上含量最丰富的天然高分子之一。由于其自然再生性、低廉的价格、良好的机械性能、生物相容性和可生物降解性,开发纤维素基‘绿色’功能材料已成为解决化学原材料危机,实现社会可持续发展的有效途径之一。本研究在纤... 详细信息

＜正＞纤维素是地球上含量最丰富的天然高分子之一。由于其自然再生性、低廉的价格、良好的机械性能、生物相容性和可生物降解性,开发纤维素基‘绿色’功能材料已成为解决化学原材料危机,实现社会可持续发展的有效途径之一。本研究在纤维素-LiCl/MAc均相溶液中,

关键词： Cellulose Photoresponsive reversible transition

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