石墨烯/TPU/PDMS导电复合材料的拉伸敏感性能研究-《郑州大学学报(工学版)》

文章信息/Info

Title:: A Study on Tensile Sensitive Behaviors of Graphene/Thermoplastic Polyurethane/ Polydimethylsiloxane Conductive Polymer Composites

Author(s):: Dai Kun1; 2; Kong Weiwei 1; Zhan Pengfei 1; Zong Jiyou 1; Zhai Wei 2; Liu Chuntai 1; 2; 1. School of Materials Science and Engineering, Zhengzhou University; 2. National Engineering Research Center of Rubber and Plastic Mold, Zhengzhou University

Keywords:: Polydimethylsiloxane; conductive network; Conductive polymer composite materials; package; Stretch sensitive properties; hysteresis effect

摘要:: 本文通过静电纺丝和喷涂工艺制备了含导电纤维网络的石墨烯（G）/热塑性聚氨酯（TPU）/聚二甲基硅氧烷（PDMS）导电复合材料，并对其拉伸敏感性能进行了详细研究。在拉伸应力场中，该导电复合材料具有大的断裂伸长率（165%）。随拉伸应变的增加，复合材料拉敏响应度先缓慢上升，当应变大于50%时，发生突变，整体表现出正的应变电阻响应行为。基于PDMS的封装作用，材料在循环应力场中表现出较弱的滞后效应和稳定的电阻响应行为。在电阻响应循环曲线中，复合材料在不同的应变幅度下均表现出良好的响应稳定性。本文报道的G/TPU/PDMS导电复合材料在柔性可穿戴电子设备领域具有良好的应用前景。

Abstract:: In this paper, the graphene (G) /thermoplastic polyurethane (TPU) /polydimethylsiloxane (PDMS) conductive polymer composites(CPCs) with conductive fibrous network s were prepared by the electrostatic spinning and spraying technology, and their strain sensing behaviors were studied in detail. The CPCs possess large elongation at break (165%). With the strain increasing , the sensitivity increases gently at first , and when the strain is greater than 50%, the sensitivity increases sharply, which shows a positive response between strain and sensitivity. Meanwhile, the CPCs exhibit weak hysteresis effect and stable resistance-strain sensing response behavior during the cyclic stretching, which is attributed to the encapsulation of PDMS . For the cyclic resistance-strain sensing curve s, the CPCs show good response stability under different strain amplitudes. The G/TPU/PDMS CPCs reported in this paper have brilliant application prospects in the field of flexible wearable electronics.