摘要
复合导电水凝胶因良好的黏附力和机械柔韧性成为柔性传感器领域研究的热点。为了提高导电水凝胶的电导性,在聚丙烯酰胺水凝胶中加入导电离子Li^(+)和Cl^(-),利用扫描电镜对材料内部进行表征,使用电导率表征了水凝胶的导电性能。探究了导电离子的加入对电导性能的影响,优化交联剂添加量,以取得最好的黏附力和机械柔韧性,并设计水凝胶传感器应用于监测人体手指关节、腕部背部等的动作。测试结果表明,水凝胶的电导率随着离子含量的提高而增大,当LiCl添加量为15 mmol时,最大电导率为5.34 S·m^(-1),水凝胶中交联剂的量控制在3~6 mg,取得了良好的黏附力和机械柔韧性。人体机械动作和莫尔斯电码的传感监测结果表明,本传感器能够稳定、准确、快速捕捉机械信号,并将其转化为相应的电信号,且对于相同行为的输出电信号具有重复性。该传感器在人体信号的监测、传递和转化上具有良好的应用发展前景。
Composite conductive hydrogels have become a hot research topic in the field of flexible sensors due to their good adhesion and mechanical flexibility.In order to improve the electrical conductivity of conductive hydrogels,conductive ions Li+and Cl−were added to the polyacrylamide hydrogels.The conductivity of the hydrogels was characterized using scanning electron microscopy for internal characterization of the materials.The effect of the content of conductive ions on the conductivity of hydrogels was investigated,and the amount of crosslinker addition was optimized to achieve the best adhesion and mechanical flexibility.Furthermore,the hydrogel sensor was designed to monitor the movements of human finger joints and back of the wrist.The results show that the conductivity of the hydrogel improves with the increase of ionic content.The maximum conductivity is 5.34 S·m^(−1) when the LiCl addition is 15 mmol,and the amount of cross-linking agent in the hydrogel is controlled at 3-6 mg,and obtain good adhesion and mechanical flexibility.After sensing and monitoring the human mechanical action and Morse code,the sensor is capable of capturing mechanical signals stably,accurately and quickly,converting them into corresponding electrical signals,and has repeatability of the output electrical signals for the same behavior.Results illustrate the good application development prospect of this sensor in monitoring,transmission and conversion of human body signals.
作者
柯晓玲
林萍
周建华
苗蕾
KE Xiaoling;LIN Ping;ZHOU Jianhua;MIAO Lei(Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《桂林电子科技大学学报》
2025年第3期298-304,共7页
Journal of Guilin University of Electronic Technology
基金
国家自然科学基金(52173094)
广西自然科学基金(2019GXNSFFA245010)。
作者简介
通信作者:周建华(1982-),男,教授,博士,研究方向为太阳能功能材料、智能高分子材料、生物传感器。E-mail:jianhuazhou@guet.edu.cn。
