材料科学
耐久性
石墨烯
极限(数学)
检出限
拉伤
可穿戴计算机
复合材料
可穿戴技术
纳米技术
计算机科学
嵌入式系统
内科学
数学分析
统计
医学
数学
作者
Yanjun Zheng,Yilong Li,Yujie Zhou,Kun Dai,Guoqiang Zheng,Bing Zhang,Chuntai Liu,Changyu Shen
标识
DOI:10.1021/acsami.9b17173
摘要
Electronic textiles featuring a controllable strain sensing capability and comfortable wearability have attracted huge interests with the rapid development of wearable strain sensor systems. It is still a great challenge to simultaneously achieve a strain sensor with low cost, biocompatibility, large-area compatibility, and excellent sensing performances. Here, two kinds of cotton fabric-based strain sensors (CFSSs) with different conductive network structures are prepared, i.e., CFSS-90° and CFSS-45° (90° and 45° represent the angles between intertwined direction in cotton yarns and the stretching direction in tension). After multiple dipping processes, graphene nanosheets are deposited onto cotton fabrics, and then, the fabrics are encapsulated by polydimethylsiloxane (PDMS). Morphology analyses reveal that an interpenetrating structure is generated between cotton fabric and PDMS. The strength and elongation at break of CFSS-45° are about 4.5 MPa and 75% strain, which are higher than the counterparts of CFSS-90° (1.75 MPa and 30% strain, respectively). In a uniaxial stretching test, the two strain sensors exhibit excellent linear current–voltage behavior and fast response time (∼90 ms). During the cyclic stretching–releasing test, CFSSs present remarkable reproducibility, durability (10 000 cycles at 30% strain for CFSS-45°), and a sensing capability for detecting very low strain (∼0.4% strain).
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