Biomimetic preparation of elastomeric fibers
with micro/nano structures on the surfaces |
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Authors: | Quanyong Liu Liqun Zhang and Lei Jiang |
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Institution: | 1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China;2. Beijing National Laboratory for Molecular Sciences (MNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;3. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China |
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Abstract: | Bioinspired by the spinning of spider silks, the biomimetic preparation of elastomeric fibers with micro/nano structures on the surfaces was attempted, and as a result, three types of ultrafine full-vulcanized powdered nitrile-butadiene rubber (UFPNBR)/thermoplastic polyurethane (TPU) fibers were made. The first fiber was only decorated by the micron-sized grooves on the surface, and the second fiber was dotted by both the micron-sized grooves and nanometer-sized spheres on the surface, while the third fiber was helical and with a concave–convex surface. The biomimetic preparation mainly consisted of four steps, and the formation mechanism was described as an integrated mechanism of diffusion, coagulation, self assembly, and microphase separation. The micro/nano structures on the fibers were controlled by changing the mass ratio of UFPNBR to TPU and environment of vertical stretching. The UFPNBR/TPU elastomeric fibers were hoped to have an integrated function of superhydrophobicity, self cleaning, and mechanical improvement of toughness or strength. |
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Keywords: | Biomimetic preparation Elastomeric fiber Micro/nano structure Self assembly Spider silk |
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