Ultrasmall barium titanate nanoparticles modulated stretchable dielectric elastomer sensors with large deformability and high sensitivity  

作　　者：Zun-Peng Feng Ya-Nan Hao Jing Qin Shao-Long Zhong Ke Bi Yu Zhao Li-Juan Yin Jia-Yao Pei Zhi-Min Dang 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing,the People's Republic of China [2]State Key Laboratory of Power System,Department of Electrical Engineering,Tsinghua University,Beijing,the People's Republic of China [3]Beijing University of Posts and Telecommunications Research Institute,Shenzhen,the People's Republic of China [4]School of Electrical Engineering,Zheng Zhou University,ZhengZhou,the People's Republic of China

出　　处：《InfoMat》2023年第8期94-106,共13页信息材料（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51972032,51937007,and 51921005);Science and Technology Program of the State Grid Corporation of China(5500-201999527A-0-0-00);Science and Technology Program of Shenzhen Science and Technology Innovation Commission(Grant No.JCYJ20180306173235924);BUPT Excellent Ph.D.Students Foundation(CX2021128).

摘　　要：Large deformability and high sensitivity is difficult to be realized simultaneously in flexible sensors.Herein,taking advantage of the high permittivity and highly active surfaces of the ultrasmall barium titanate nanoparticles(BT NPs)and the high stretchability of the p(BA-GMA)elastomer matrix,we propose a high-performance soft stretchable sensor.The addition of the ultrasmall BT NPs can not only increase the permittivity and capacitance of polyacrylate-matrix composite dielectric material to obtain a high sensitivity,but also basically maintains the excellent mechanical properties of the polymer matrix.The dielectric constants of the composite films increase from 5.68 to 13.13 at 10 kHz with the increase of BT NPs content from 0 to 15 vol.%,which results in a high capacitance of 236.16 pF for 15 vol.%BT/p(BA-GMA)sensor.Combining the high permittivity and the large deformability(a maximal deformation of 87.2%),the 15 vol.%BT/p(BA-GMA)sensor has high sensitivity and shows high linearity and stable output even if under dynamic measurement.The dual-mode sensor that utilizes the orthogonality of capacitance-resistance is designed,which shows excellent performance in monitoring human body movements and noncontact measurement.The results present that the BT/p(BA-GMA)-based sensor has high stability and reliability not exceed 65C,which can meet the application requirements in dynamic monitoring.

关 键 词：barium titanate composite dielectric ELASTOMER NANOPARTICLES stretchable sensor 

分 类 号：TB383[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]