PVA/明胶双网络热电水凝胶制备及自驱动呼吸监测应用  

Preparation of PVA/Gel Dual-Network Thermoelectric Hydrogel and Its Application for Self-Powered Respiration Monitoring

作　　者：崔小静 聂钰又 吴瑞敏 芦宾 王大为[1] 张虎林 Cui Xiaojing;Nie Yuyou;Wu Ruimin;Lu Bin;Wang Dawei;Zhang Hulin(School of Physics and Information Engineering,Shanxi Normal University,Taiyuan 030031,China;College of Information and Computer,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]山西师范大学物理与信息工程学院,太原030031 [2]太原理工大学信息与计算机学院,太原030024

出　　处：《微纳电子技术》2023年第9期1422-1428,共7页Micronanoelectronic Technology

基　　金：国家自然科学基金青年项目(62004119,62201332);山西省青年科学研究项目(202103021223258,20210302124028)。

摘　　要：呼吸监测对于人体健康监测具有重要意义。人在呼吸过程中鼻腔呼出的气体温度明显高于环境温度,因此利用热电水凝胶的温度敏感特性研究了一种基于热电水凝胶的自驱动人体呼吸监测装置。通过在聚乙烯醇(PVA)/明胶双网络水凝胶中引入I-和I-3氧化还原电对,将人体呼吸过程产生的温差信号转化成电信号,且塞贝克系数可以达到0.71 mV/K。通过对该热电水凝胶力学性能和电学性能的测试和分析,证明了其不仅具有良好的柔性、可拉伸性,而且能够用于人体呼吸状态监测,及时发现人体呼吸异常情况。该研究可为基于水凝胶的可穿戴电子设备的应用研究提供理论参考和技术支持。Respiration monitoring is of great significance to human health monitoring.During respiration process,the temperature of the gas exhaled from the nasal cavity is obviously higher than the ambient temperature.Therefore,by temperature sensing characteristic of the thermoelectric hydrogel,a self-powered human respiration monitoring device based on the thermoelectric hydrogel was studied.By introducing I-/I-3 redox electric pairs into polyvinyl alcohol(PVA)/gelatin double-network hydrogel,the temperature difference signals generated during respiration process were converted into electrical signals.And the Seebeck coefficient can reach 0.71 mV/K.Through the test and analysis of the mechanical and electrical properties of the thermoelectric hydrogel,it is proved that the thermoelectric hydrogel has good flexibility and stretchability,and can be used to monitor human respiration status and detect abnormal respiratory conditions in time.The research can provide theoretical reference and technical support for the application research of wearable electronic devices based on hydrogels.

关 键 词：水凝胶 热电转换 微纳传感 自驱动 呼吸监测 

分 类 号：TK6[动力工程及工程热物理—生物能] TH703[机械工程—仪器科学与技术]