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首页> 外文期刊>ACS applied materials & interfaces >Bio-Inspired Stretchable and Contractible Tough Fiber by the Hybridization of GO/MWNT/Polyurethane
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Bio-Inspired Stretchable and Contractible Tough Fiber by the Hybridization of GO/MWNT/Polyurethane

机译：通过GO / MWNT /聚氨酯的杂交生物启发可伸缩和可致粘性的韧性

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摘要

Spider silks represent stretchable and contractible fibers with high toughness. Those tough fibers with stretchability and contractibility are attractive as energy absorption materials, and they are needed for wearable applications, artificial muscles, and soft robotics. Although carbon-based materials and poly(vinyl alcohol) (PVA) composite fibers exhibit high toughness, they are still limited in low extensibility and an inability to operate in the wet-state condition. Herein, we report stretchable and contractible fiber with toughness that is inspired by the structure of spider silk. The bioinspired tough fiber provides 495 J/g of gravimetric toughness, which exceeds 165 J/g of spider silk. Besides, the tough fiber was reversibly stretched to similar to 80% strain without damage. This toughness and stretchability are realized by hybridization of aligned graphene oxide/multiwalled carbon nanotubes in a polyurethane matrix as elastic amorphous regions and beta-sheet segments of spider silk. Interestingly, the bioinspired tough fiber contracted up to 60% in response to water and humidity similar to supercontraction of the spider silk. It exhibited 610 kJ/m(3) of contractile energy density, which is higher than previously reported moisture driven actuators. Therefore, this stretchable and contractible tough fiber could be utilized as an artificial muscle in soft robotics and wearable devices.
机译：蜘蛛丝网表示具有高韧性的可伸缩性和可收缩的纤维。这些具有可拉伸性和收缩性的坚韧纤维是吸引能量吸收材料的吸引力，可穿戴应用，人造肌肉和软机器人需要它们。尽管碳基材料和聚（乙烯醇）（PVA）复合纤维具有高韧性，但它们仍然限制在低可延长性和在湿状状态下操作。在此，我们通过蜘蛛丝的结构推动可伸缩和可收缩的纤维。 Bioinspired韧性纤维提供495 j / g的重量韧性，超过165 j / g的蜘蛛丝。此外，坚固的纤维可逆地拉伸至类似于80％的菌株而不会损坏。通过在聚氨酯基质中的对齐的石墨烯氧化物/多壁碳纳米管杂交作为弹性非晶区域和蜘蛛丝的β-片段来实现这种韧性和拉伸性。有趣的是，生物悬浮的强硬纤维响应于水和湿度的耐湿度，与蜘蛛丝的超级相似，持续60％。它表现出610 kJ / m（3）的收缩能量密度，高于先前报告的水分驱动致动器。因此，这种可伸缩和可收缩的强硬纤维可以用作软机器人和可穿戴装置的人造肌肉。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第34期|共7页
  • 作者

    Kim Hyunsoo; Jang Yongwoo; Lee Dong Yeop; Moon Ji Hwan; Choi Jung Gi; Spinks Geoffrey. M.; Gambhir Sanjeev; Officer David L.; Wallace Gordon G.; Kim Seon Jeong;

  • 作者单位

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

    Univ Wollongong ARC Ctr Excellence Electromat Sci AIIM Facil Intelligent Polymer Res Inst Innovat Campus North Wollongong NSW 2522 Australia;

    Univ Wollongong ARC Ctr Excellence Electromat Sci AIIM Facil Intelligent Polymer Res Inst Innovat Campus North Wollongong NSW 2522 Australia;

    Univ Wollongong ARC Ctr Excellence Electromat Sci AIIM Facil Intelligent Polymer Res Inst Innovat Campus North Wollongong NSW 2522 Australia;

    Univ Wollongong ARC Ctr Excellence Electromat Sci AIIM Facil Intelligent Polymer Res Inst Innovat Campus North Wollongong NSW 2522 Australia;

    Hanyang Univ Dept Biomed Engn Ctr Self Powered Actuat Seoul 04763 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Toughness; stretchability; contraction; carbon nanotube; graphene oxide; polyurethane; fiber;

    机译：韧性;拉伸性;收缩;碳纳米管;石墨烯;聚氨酯;纤维;

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