A flame-retardant and transparent wood/polyimide composite with excellent mechanical strength

Chen, Lian; Xu, Zhiyong; Feng, Wang; Duan, Gaigai; Xu, Wenhui; Zhang, Guoying; Yang, Haoqi; Liu, Jinbiao; Jiang, Shaohua

doi:10.1016/j.coco.2020.05.001

Cited by 79 publications

(27 citation statements)

References 28 publications

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“…By structural design with modifications on spinnerets and collectors, functional electrospun fibers with special structures Janus, core-shell, hollow, porous, helical, etc., are comprehensively investigated. Such functional electrospun fibers have been widely used in different fields, such as masks (26,27), stimuli-responsive materials and actuators (28)(29)(30)(31), separation and filtration (32)(33)(34)(35)(36)(37)(38)(39), reinforcements (40)(41)(42)(43)(44)(45), wearable electronics (46)(47)(48)(49)(50), sponges/aerogels (51)(52)(53)(54)(55)(56), tissue engineering (57,58), detection metal ions (59)(60)(61), energy storage (62)(63)(64)(65)(66), catalysts (67)(68)(69)(70)(71)(72)…”

Section: Introductionmentioning

confidence: 99%

Structural design toward functional materials by electrospinning: A review

et al. 2020

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Electrospinning as one of the most versatile technologies have attracted a lot of scientists’ interests in past decades due to its great diversity of fabricating nanofibers featuring high aspect ratio, large specific surface area, flexibility, structural abundance, and surface functionality. Remarkable progress has been made in terms of the versatile structures of electrospun fibers and great functionalities to enable a broad spectrum of applications. In this article, the electrospun fibers with different structures and their applications are reviewed. First, several kinds of electrospun fibers with different structures are presented. Then the applications of various structural electrospun fibers in different fields, including catalysis, drug release, batteries, and supercapacitors, are reviewed. Finally, the application prospect and main challenges of electrospun fibers are discussed. We hope that this review will provide readers with a comprehensive understanding of the structural design and applications of electrospun fibers in different fields.

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Section: Introductionmentioning

confidence: 99%

Structural design toward functional materials by electrospinning: A review

et al. 2020

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“…For other opaque polymers, chemical treatment and composite modification are needed to obtain transparent products. For example, the optical transparence of natural wood could be significantly improved by the chemical removal of chromogenic groups and lignin, and the penetration of polymers with a suitable refractive index, such as polyvinyl alcohol (PVA) [ 46 , 47 ], epoxy resin [ 48 ] and polyimide (PI) [ 49 ]. Using epoxy resin as a permeation polymer, Mi et al [ 50 ] prepared transparent wood with light transmittance up to 80%, which has a good anti-glare performance and light-guiding properties (as shown in Figure 3 ).…”

Section: Optically Transparent Materialsmentioning

confidence: 99%

Preparation and Applications of Electrospun Optically Transparent Fibrous Membrane

et al. 2021

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The optically transparent electrospun fibrous membrane has been widely used in many fields due to its simple operation, flexible design, controllable structure, high specific surface area, high porosity, and unique excellent optical properties. This paper comprehensively summarizes the preparation methods and applications of an electrospun optically transparent fibrous membrane in view of the selection of raw materials and structure modulation during preparation. We start by the factors that affect transmittance among different materials and explain the light transmission mechanism of the fibrous membrane. This paper also provides an overview of the methods to fabricate a transparent nanofibrous membrane based on the electrospinning technology including direct electrospinning, solution treatment after electrospinning, heat treatment after electrospinning, and surface modification after electrospinning. It further summarizes the differences in the processes and mechanisms between different transparent fibrous membranes prepared by different methods. Additionally, we study the utilization of transparent as-spun membranes as flexible functional materials, namely alcohol dipstick, air purification, self-cleaning materials, biomedicine, sensors, energy and optoelectronics, oil–water separation, food packaging, anti-icing coating, and anti-corrosion materials. It demonstrates the high transparency of the nanofibers’ effects on the applications as well as upgrades the product performance.

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“…[256] The main components of the pulp fibres are amorphous hemicellulose and cellulous fibres. [257] The major steps of transparent paper making is cellulose dissolution and regeneration and polymer impregnation. [258] However, the final products lack the mechanical strength of untreated wood with regard to their oriented cell structure and hierarchical construction, and this makes application in complex structures nonviable.…”

Section: Introductionmentioning

confidence: 99%

Dual-functional superwettable nano-structured membrane: From ultra-effective separation of oil-water emulsion to seawater desalination

Chen

Liu

Wang

et al. 2021

Chemical Engineering Journal

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Many research works are striving to purify oil contaminated wastewater. Membrane with distinct affinity toward oil or water is one of the most promising method for oil-induced wastewater treatment. However, with the emulsifier present in most wastewater, the immiscible oil/water mixture is more difficult to be separated. Meanwhile, making use of the most abundant resource of seawater, solar vapour generation has emerged as a sustainable method for water distillation.However, traditional solar steam technologies still rely on expensive or cumbersome optical infrastructure or suffer from low energy efficiency. A water purification system with the ability to treat industrial oily wastewater and distill seawater is yet to be developed. In this thesis, a robust electrospun nanofibrous poly(vinyl alcohol) membrane (NPM) decorated with slow oxidization of polypyrrole nanoparticles was synthesized to realise dual-functional water purification. Scanning electron microscopy (SEM) was utilized to characterize the morphology of the NPM. Fourier-transform infrared spectroscopy (FTIR) was used to verify the chemical composition of the NPM. Contact angle tests were carried out to validate superhydrophilicity/underwater superoleophobicity of the NPM. Repeated oil/water emulsion separation tests were conducted to obtain the results of separation efficiency, separation flux and anti-fouling property of the NPM. UV-vis was utilized to test the light absorption ability of the NPM. Simulated sun tester was used to test the solar vapor generation capacity of the NPM. In summary, the NPM is capable of separating sundry organic solvents-water emulsions with a separation efficiency of over 99.99%. The NPM is also capable of desalinating the seawater under one sun solar radiation with an evaporation rate of 2.87 kg m -2 h -1 . II AcknowledgementsExtensive thanks must be given to Dr. Malcolm Xing of the Department of Mechanical Engineering at University of Manitoba for his much appreciated guidance and academic support throughout my studies, without whom this research work would not be conducted successfully.I would also like to thank the rest of my thesis committee: Dr. Subramaniam Balakrishnan and Dr. Qingjin Peng for their insightful comments and inspiration.Thanks also to Dr. Wen Zhong and Dr. Yuqing Liu for their support in many of the practical elements of this work as well as the technical trainings.My thanks also go to my lab mates for their insights from our discussions and assistance during the experiments.Last but not least, my thanks go to my friends and family for their unconditional support during my graduate study. III

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A flame-retardant and transparent wood/polyimide composite with excellent mechanical strength

Cited by 79 publications

References 28 publications

Structural design toward functional materials by electrospinning: A review

Structural design toward functional materials by electrospinning: A review

Preparation and Applications of Electrospun Optically Transparent Fibrous Membrane

Dual-functional superwettable nano-structured membrane: From ultra-effective separation of oil-water emulsion to seawater desalination

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