天津工业大学学报2025，Vol.44Issue(3)：39-48,10.DOI:10.3969/j.issn.1671-024x.2025.03.005
PVA/HEDP/PEDOT:PSS复合水凝胶的制备及传感应用
Preparation and sensing application of PVA/HEDP/PEDOT:PSS composite hydrogel
摘要
Abstract
To address the limitations in the stretchability and stability of hydrogels,which restrict their applications,polyvinyl alcohoi(PVA)composite hydrogel based on hydroxylethylidene diphosphonic acid(HEDP)as an auxiliary a-gent was developed by simple freeze-thaw method.Conductive polymer PEDOT:PSS was added to enhance the electrical conductivity of the composite hydrogel.The structure of the composite hydrogel was characterized,and its swelling,water retention,mechanical properties,and conductivity were tested.The composite hydrogel was used in strain sensors to investigate its strain sensing performance.The results show that when the mass ratio of PVA to HEDP is 8∶2 and the mass fraction of PEDOT:PSS is 15％,the PVA/HEDP/PEDOT:PSS composite hydrogel prepared by freezing for 18 h at-25 ℃,exhibited an impressive tensile elongation rate of 949％,a good electrical conductivity of 0.32 S/m,and excellent linear sensitivity(GF=1.16)within the 400％strain range.This hydrogel-based sensor can efficiently monitor various human movements,including subtle facial expression changes and large joint activities,and accurately capture the minute variations in pulse waveforms.It holds sig-nificant potential for applications in human activity monitoring and health management.关键词
复合水凝胶/高拉伸性/冻融法/信号监测Key words
composite hydrogel/high stretchability/freeze-thaw method/signal monitoring分类
信息技术与安全科学引用本文复制引用
周金利,王晨晓,魏烨,郑俊杰,王赛娅..PVA/HEDP/PEDOT:PSS复合水凝胶的制备及传感应用[J].天津工业大学学报,2025,44(3):39-48,10.基金项目
河南省科技攻关项目(252102230012,252102211104) （252102230012,252102211104）
中原工学院自然科学基金项目(K2025YB017) （K2025YB017）
