Flexible strain sensor based on PVA-co-AAm double-network conductive hydrogel

ZHU Ming; LI Kerui; LI Yaogang; ZHANG Qinghong; WANG Hongzhi; HOU Chengyi

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Flexible strain sensor based on PVA-co-AAm double-network conductive hydrogel

Research & Approach | 更新时间：2026-03-01

- Flexible strain sensor based on PVA-co-AAm double-network conductive hydrogel
- Vol. 45, Issue 2, Pages: 6-11(2026)
- 作者机构：
  
  东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海,201620
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212
- Published：2026
- 稿件说明：
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ZHU Ming, LI Kerui, LI Yaogang, et al. Flexible strain sensor based on PVA-co-AAm double-network conductive hydrogel[J]. 2026, 45(2): 6-11.
DOI：

ZHU Ming, LI Kerui, LI Yaogang, et al. Flexible strain sensor based on PVA-co-AAm double-network conductive hydrogel[J]. 2026, 45(2): 6-11. DOI：

摘要

针对柔性应变传感器在导电性能和力学性能上难以兼顾的问题，提出一种通过光交联和冻融处理的方法制备出基于聚乙烯醇-丙烯酰胺（PVA-co-AAm）双网络导电水凝胶的柔性应变传感器。通过双网络结构的构筑，该凝胶的力学性能得到了显著改善；低模量使得其用于柔性应变传感器时能够对人体皮肤上的微小应变迅速做出响应（响应时间96ms），并能够根据不同运动姿态生成各种响应信号，其对高强度压力的感应灵敏度可达45.3s

-1

。这些性能展现了该柔性应变传感器在人体姿态监测和交互识别场景中具有良好的应用前景。

Abstract

Aiming at the problem that it is difficult to balance the conductive and mechanical properties of flexible strain sensors

a type of flexible strain sensor based on poly(vinyl alcohol)-co-acrylamide(PVA-co-AAm)double-network conductive hydrogel is prepared by photo-crosslinking and freeze-thawing treatments.The mechanical properties of the hydrogel are significantly improved by the construction of the double-network structure

and its low modulus enables it to respond rapidly to small strains on human skin (response time:96ms)

when used in flexible strain sensors and it can generate various response signals according to different motion postures

and its sensitivity to high-intensity pressure is

up to 45.3s

-1

.These performances show that the flexible strain sensor has good application prospects in human posture monitoring and interaction recognition scenarios.

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