Preparation and force-sensitive properties of carbon nanotube/polydimethylsiloxane composites films
An Ping, Guo Hao, Chen Meng, Zhao Miao-Miao, Yang Jiang-Tao, Liu Jun, Xue Chen-Yang, Tang Jun
Key Laboratory of Instrumentation Science and Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, China; State Key Laboratory of Science and Technology on Electronic Test and Measurement, North University of China, Taiyuan 030051, China
Abstract With the development of sensors, a study on carbon nanotube composites (CNT) used as force sensing elements is presented in this paper, which consists of carbon nanotubes with polydimethylsiloxane (PDMS) as a matrix. Nanocomposites of carbon nanotube and polydimethylsiloxane, CNT-PDMS with different filler concentrations have been successfully prepared via ultrasonic and mixed method. With different density, the electrical characteristics change as a function of the strain. The piezo-resistance and piezo-capacitance properties of these composites have been studied in detail. In our experiment, the gauge factor has reached 40 for piezo-resistance and 70 for piezo-capacitance. It is shown that there is an effective and reliable way, which is to change the density of CNT-PDMS nanocomposites, to set the features to sensing strain and stress for resistance and capacitance of the composites. This nanomaterial has a decent potential in mechanical quantity sensors field.
Fund: Project supported by the Fund for Fostering Talents in Basic Science of the National Natural Science Foundation of China (Grant No. 91123016), the National Natural Science Foundation of China (Grant No. 61171056), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51105345), the National Basic Research Program of China (Grant No. 2012CB723404), the National Science Fund for Distinguished Young Scholars of China (Grant No. 51225504), and the Program for the Top Young Academic Leaders of Institution of Higher Education of Shanxi Province, China.
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2014, Vol. 63 
