PVA/HEDP/PEDOT:PSS复合水凝胶的制备及传感应用

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中图分类号：TP212.3；R318 文献标志码：A 文章编号：1671-024X（2025）03-0039-10

Preparationand sensing applicationof PVA/HEDP/PEDOT：PSS composite hydrogel

ZHOU Jinli，WANG Chenxiao，WEIYe，ZHENG Junjie，WANG Saiya （Collge of Intellgent TextileandFabric Electronics，Zhongyuan Universityof Tchnology，Zhengzhou，China）

Abstract：Toaddressthelmitations inthestretchabilityandstabilityofhdrogels，whichrestricttheirapplications，polyvinyl alcohoi（PVA）composite hydrogel based on hydroxylethylidene diphosphonic acid（HEDP）as an auxiliary agent was developed by simple freeze-thaw method. Conductive polymer PEDOT ： PSS was added to enhance the electrical conductivityofthecomposite hydrogel.The structureof the composite hydrogelwascharacterized，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% ，thePVA/HEDP/PEDOT ：PSS composite hydrogel preparedbyfreezing for18hat ，exhibitedanimpressive tensile elongation rate of 949%，a good electrical conductivity of O.32 S/m，and excellent linear sensitivity （ GF=1.16 ）within the 40% strain range. This hydrogel-based sensor can eficiently monitor various human movements，including subtle facial expression changes and large joint activities，and accurately capture the minute variations in pulse waveforms.It holds significant potential for applications in human activity monitoring and health management.

Key Words：composite hydrogel;high stretchability; freeze-thaw method;signal monitoring

随着科技的持续发展，智能传感器在柔性电子皮肤、可穿戴设备及人机界面等领域的应用需求日益增长-3]。（剩余14521字）