一种基于碳纳米管-液晶-PDMS复合材料的高灵敏度压力传感器  

A Highly Sensitive Pressure Sensor Based on Carbon Nanotube-LC-PDMS Composite

作　　者：潘进 杨一诚 刘诗雨 陆建钢[1] Pan Jin;Yang Yicheng;Liu Shiyu;Lu Jiangang(Department of Electronic Engineering,Shanghai Jiaotong University,Shanghai 200240)

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《中国基础科学》2018年第5期35-40,F0002,共7页China Basic Science

基　　金：国家自然科学基金项目(61775135)

摘　　要：电阻式压冷传感器通常在活性层制作微结构,来减小杨氏模量并提高灵敏度。然而,这种方法常常需要复杂的制备工艺且很难控制微结构均一性。因此,本文提出了一种基于多壁纳米碳管(MWCNT)-低极性液晶分子(LPLC)-聚二甲基硅氧烷(PDMS)活性层的高灵敏度电阻式压力传感器。低极性液晶分子在PDMS中形成聚合物分散液晶(PDLC)结构,该结构不仅能减少活性层的杨氏模量,同时也能在活性层形成导电通路,易均一性控制。通过优化PDMS中LC的含量,该电阻式压力传感器表现出高灵敏度(5.35 kPa^(-1))、快速响应时间(<150 ms)和很高的耐久性。Microstructures are typically introduced to the active layer in resistive pressure sensors to reduce Young's modulus and increase sensitivity.However,this method often requires complicated processes and is difficult to control the uniformity.Therefore,we proposed a high-sensitivity resistive pressure sensor based on multiwalled carbon nanotube (MWCNT)-low polarity liquid crystal (LPLC )-polydimethylsiloxane (PDMS )active layer.The LPLC forms a polymer dispersed liquid crystal (PDLC)structure in PDMS,which not only reduces the Young's modulus of the active layer,but also forms a conductive path.By optimizing the LC content in PDMS,the pressure sensor exhibits high sensitivity,fast response time and high durability.

关 键 词：高灵敏度 聚合物分散液晶(PDLC) 多壁纳米碳管(MWCNT) 电阻式压力传感器 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]