Highly Stretchable,Elastic,and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

查看全文 作　　者：Yao [1]Lu;Xinyu [1]Qu;Wen [1]Zhao;Yanfang [2]Ren;Weili [1]Si;Wenjun [2]Wang;Qian [1]Wang;Wei [3]Huang;Xiaochen [1,4]Dong

机构地区：[1]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),School of Physical and Mathematical Sciences,Nanjing Tech University(NanjingTech),30 South Puzhu Road,Nanjing 211800,China;[2]School of Physical Science and Information Technology,Liaocheng University,Liaocheng 252059,China;[3]Shaanxi Institute of Flexible Electronics(SIFE),Northwestern Polytechnical University(NPU),Xi’an 710072,China;[4]School of Chemistry and Materials Science,Nanjing University of Information Science&Technology,Nanjing 210044,China

出　　处：《Research》索引2020年第1期,共13页

基　　金：The work was supported by the National Natural Science Foundation of China(61775095);the Six Talent Peak Innovation Team in Jiangsu Province(TD-SWYY-009);‘Taishan Scholars’Construction Special Fund of Shandong Province. 摘　　要：Electronic skin is driving the next generation of cutting-edge wearable electronic products due to its good wearability and high accuracy of information acquisition.However,it remains a challenge to fulfill the requirements on detecting full-range human activities with existing flexible strain sensors.Herein,highly stretchable,sensitive,and multifunctional flexible strain sensors based on MXene-(Ti_(3)C_(2)T_(x)-)composited poly(vinyl alcohol)/polyvinyl pyrrolidone double-network hydrogels were prepared.The uniformly distributed hydrophilic MXene nanosheets formed a three-dimensional conductive network throughout the hydrogel,endowing the flexible sensor with high sensitivity.The strong interaction between the double-network hydrogel matrix and MXene greatly improved the mechanical properties of the hydrogels.The resulting nanocomposited hydrogels featured great tensile performance(2400%),toughness,and resilience.Particularly,the as-prepared flexible pressure sensor revealed ultrahigh sensitivity(10.75 kPa^(-1))with a wide response range(0-61.5 kPa),fast response(33.5 ms),and low limit of detection(0.87 Pa).Moreover,the hydrogel-based flexible sensors,with high sensitivity and durability,could be employed to monitor fullrange human motions and assembled into some aligned devices for subtle pressure detection,providing enormous potential in facial expression and phonation recognition,handwriting verification,healthy diagnosis,and wearable electronics. 关键词：TOUGHNESS ELASTIC DURABILITY

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Highly Stretchable,Elastic,and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors

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