气凝胶
材料科学
假弹性
纤维素
纳米颗粒
纳米技术
炭黑
碳纳米管
纳米复合材料
复合材料
化学工程
天然橡胶
微观结构
工程类
马氏体
作者
Yifan Zhang,Penghui Zhu,Hao Sun,Xia Sun,Yuhang Ye,Feng Jiang
出处
期刊:Small
[Wiley]
日期:2023-11-14
卷期号:20 (13)
被引量:7
标识
DOI:10.1002/smll.202310038
摘要
Superelastic aerogels with rapid response and recovery times, as well as exceptional shape recovery performance even from large deformation, are in high demand for wearable sensor applications. In this study, a novel conductive and superelastic cellulose-based aerogel is successfully developed. The aerogel incorporates networks of cellulose sub-micron fibers and carbon black (SMF/CB) nanoparticles, achieved through a combination of dual ice templating assembly and electrostatic assembly methods. The incorporation of assembled cellulose sub-micron fibers imparts remarkable superelasticity to the aerogel, enabling it to retain 94.6% of its original height even after undergoing 10 000 compression/recovery cycles. Furthermore, the electrostatically assembled CB nanoparticles contribute to exceptional electrical conductivity in the cellulose-based aerogel. This combination of electrical conductivity and superelasticity results in an impressive response time of 7.7 ms and a recovery time of 12.8 ms for the SMF/CB aerogel, surpassing many of the aerogel sensors reported in previous studies. As a proof of concept, the SMF/CB aerogel is utilized to construct a pressure sensor and a sensing array, which exhibit exceptional responsiveness to both minor and substantial human motions, indicating its significant potential for applications in human health monitoring and human-machine interaction.
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