Facile fabrication of highly durable superhydrophobic strain sensors for subtle human motion detection  

作　　者：Li-Chuan Jia Chang-Ge Zhou Kun Dai Ding-Xiang Yan Zhong-Ming Li 

机构地区：[1]College of Electrical Engineering,Sichuan University,Chengdu 610065,China [2]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China [3]College of Materials Science and Engineering,The Key Laboratory of Material Processing and Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China [4]School of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Materials Science & Technology》2022年第15期35-42,共8页材料科学技术（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2018YFB0704200);the National Natural Science Foundation of China(Nos.51973142,21704070 and 51673134);the Science and Technology Department of Sichuan Province(No.2020YJ0318);the China Postdoctoral Science Found(Nos.2019T120838 and 2015M643471);the Fundamental Research Funds for the Central Universities(No.YJ201971)。

摘　　要：Endowing strain sensors with superhydrophobicity is of great importance to guarantee their long-term service under harsh environments(such as wet,acid,alkali and salt atmospheres),whereas,the development of superhydrophobic strain sensors remains a great challenge.Herein,we realized a superhydrophobic and highly sensitive sensor for subtle human motion detection by designing a superhydrophobic and electrically conductive coating on cotton textile,via a facile drop-coating method.The resultant strain sensor showed a large water contact angle of 161.3°and a low sliding angle of 3.8°The superhydrophobic characteristics can keep almost unchanged even after undergoing 1000 peeling cycles,1000 stretchingrelease cycles,and 1000 bending-releasing cycles,revealing its excellent mechanical robustness.High sensitivity with the maximum gage factor of 169 was achieved for the strain sensor under a small strain of0–10%,and the sensing performance also showed well durability.Moreover,our sensor can effectively detect various subtle human physiological signals and body motions even under harsh conditions.These admirable features make the sensor promising applications in wearable electronics,personalized health monitoring,sound recognition,and so on.

关 键 词：Strain sensors SUPERHYDROPHOBICITY High sensitivity Drop coating Durable 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]