Large-scalable polar bear hair-like cellular hollow fibers with excellent thermal insulation and ductility
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作者
Wang, Liang; Chi, Weili; Liu, Chuanyong; Fan, Jie; Lin, Jinyou; Liu, Yong
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刊物名称
JOURNAL OF APPLIED POLYMER SCIENCE
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年、卷、文献号
2022, 139, 0021-8995
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关键词
Wang, Liang; Chi, Weili; Liu, Chuanyong; Fan, Jie; Lin, Jinyou; Liu, Yong
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摘要
Passive warm-keeping textiles could reduce carbon emissions by turning down indoor heating in winter. Polar bear hair exhibits a unique structure composed of a hollow core and an aligned porous shell, which extremely helps to resist heat transport. Great interest has arisen in the development of thermo-insulating textiles with this biomimetic structure. In this work, cellular hollow fibers were made by a large-scalable wet spinning-foaming process. This efficient method achieved rapid formation of polar bear hair-like fiber as well as facile turning properties of the fibers. The structure and properties of biomimetic fibers depended on the content of foaming agent. As-prepared porous thermoplastic polyurethane (TPU)/polyacrylonitrile (PAN) composited fiber showed excellent ductility. The maximum tensile strength and breaking elongation was 4.31 MPa and 121%, respectively. The corresponding woven textile exhibited excellent thermal insulation properties even under deformation by compression or tension. The temperature difference across the thickness of textile was 17.9 and 34.9 degrees C under a background temperature of 0 and 80 degrees C, respectively. It may pave the way to fabricate new structure-function integrated fiber materials for warm-keeping textiles.
