静电纺丝
材料科学
膜
乙烯醇
纳米纤维
碳化
生物相容性
纺纱
碳纤维
纳米技术
化学工程
碳纳米纤维
碳纳米管
聚合物
复合材料
化学
复合数
冶金
生物化学
工程类
扫描电子显微镜
作者
Shan-Shan Chai,Guangtao Zan,Kangze Dong,Tong Wu,Qingsheng Wu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-10-18
卷期号:21 (20): 8831-8838
被引量:41
标识
DOI:10.1021/acs.nanolett.1c03241
摘要
Recent progress in flexible electronics has attracted tremendous attention. However, it is still difficult to prepare superfoldable conductive materials with good biocompatibility, high sensing sensitivities, and large specific surface areas. It is expected that biomimetic methods and water-soluble precursors like poly(vinyl alcohol) (PVA) for electrospinning will be utilized to solve the above problems. Inspired by the multistage water management process of a spider spinning dragline silk, we have established a combined biomimetic technique, hydrocolloid electrospinning coupled with temperature gradient dehydration, with a carbonization technique. PVA-driven superfoldable carbon nanofiber membranes (PVA-SFCNFMs) have been prepared that not only possess a >60% micropore ratio and a 1368.8 m2/g specific surface area but also can withstand 180° real folding for 100 000 cycles, approaching the thickness limit without structure fracture. Furthermore, these membranes provide highly sensitive sensing and superior biocompatible interfaces. The molecular mechanism to improve carbon conversion and the folding mechanism to obtain "three-level dispersing stress" for the PVA-SFCNFMs have been proposed.
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