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Waterproof, breathable and infrared-invisible polyurethane/silica nanofiber membranes for wearable textiles. 2022

Huijia Wang, and Yongjing Fu, and Rong Liu, and Jie Xiong, and Ni Li
College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China. lini@zstu.edu.cn.

Waterproof and breathable membranes, which have great potential in applications such as membrane distillation, self-cleaning, and multifunctional clothing, have attracted a lot of attention due to their superior performance. Superhydrophobic and infrared-invisible polyurethane (PU)/silica (SiO2) nanofiber microporous membranes were prepared by facile electrospinning and a hydrothermal-assisted sol-gel method. Compared with pure PU nanofiber membranes, silica nanoparticles act as an adhesion layer, which can provide the rough surface and low surface energy of fibrous membranes. Therefore, the grafted PU/SiO2 nanofiber membrane was endowed with a good superhydrophobic effect, and its water contact angle (WCA) reached 161°. The nanofiber membrane exhibited comfortable waterproof and breathable properties, in which the air permeability and water vapor transfer rate was 5.18 mm s-1 and 7.85 kg m-2 d-1, respectively. When the PU/SiO2 nanofiber membrane was irradiated by infrared light, the surface of the fiber membrane showed a green, low-temperature state. These waterproof and breathable nanofiber membranes with superhydrophobic properties could be used in anti-icing, outdoor concealment, and camouflage applications.

UI MeSH Term Description Entries
D011140 Polyurethanes A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams. Polyisocyanates,Ostamer,Pellethane,Spandex,Ostamers,Pellethanes,Polyisocyanate,Polyurethane,Spandices
D000076251 Wearable Electronic Devices Electronic implements worn on the body as an implant or as an accessory. Examples include wearable diagnostic devices, wearable ACTIVITY TRACKERS, wearable INFUSION PUMPS, wearable computing devices, SENSORY AIDS, and electronic pest repellents. Wearable Computer,Electronic Skin,Wearable Devices,Wearable Technology,Computer, Wearable,Device, Wearable,Device, Wearable Electronic,Electronic Device, Wearable,Skin, Electronic,Technology, Wearable,Wearable Computers,Wearable Device,Wearable Electronic Device,Wearable Technologies
D012822 Silicon Dioxide Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. Silica,Aerosil,Aerosil 380,Cristobalite,Quso G-32,Quso G32,Tridymite,380, Aerosil,Dioxide, Silicon,G32, Quso,Quso G 32
D013227 Steam Water in its gaseous state. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Water Vapor,Steams,Vapor, Water,Vapors, Water,Water Vapors
D013784 Textiles Filament or fiber, or the materials generated from them by weaving, embroidery, knitting, crocheting, tufting, or felting such as yarn, thread, cording, rope, netting, lace, or sheets of cloth or fabric. Textile
D057139 Nanofibers Submicron-sized fibers with diameters typically between 50 and 500 nanometers. The very small dimension of these fibers can generate a high surface area to volume ratio, which makes them potential candidates for various biomedical and other applications. Nanofiber

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