材料科学
假弹性
纳米纤维
复合材料
聚丙烯腈
静电纺丝
多孔性
超细纤维
聚合物
马氏体
微观结构
作者
Hongyan Wu,Hang Wei Cai,Shichao Zhang,Jianyong Yu,Bin Ding
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-01-10
卷期号:22 (2): 830-837
被引量:16
标识
DOI:10.1021/acs.nanolett.1c04571
摘要
Nanofibrous sponges enable promising potentials in warmth retention but are impeded by short service life and nonwashability, owing to their inadequate mechanical properties. Herein, a scalable strategy is reported to develop ultralight, superelastic, and washable micro/nanofibrous sponges (MNFSs) with a rigid-flexible coupling architecture created by bridging high-modulus polyethylene terephthalate microfibers with flexible polyacrylonitrile nanofibers via robust bonding structures. Meanwhile, the in situ doping of fluoropolymer endows micro/nanofibers with desirable amphiphobicity. The resultant MNFSs present high resilience, superior compressive fatigue resistance (5.7% residual strain at 1000th), low-temperature-resistant superelasticity (up to −196 °C), and unique washing-invariant superelasticity. Moreover, the fascinating structures of high porosity, high tortuosity, and small pores enable MNFSs both ultralight property (7.5 mg cm–3) and effective warmth retention (28.51 mW m–1 K–1). Additionally, the MNFSs possess remarkable antifouling, robust stability, and long service life. The work might provide an avenue to develop mechanically robust nanofibrous sponges for various applications.
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