Thread-type Core-Shell Polypyrrole@Polyurethane Fiber for Wearable Strain Sensor

Li-hong Xiao; Na Cheng; Sheng Xie; Lian-mei Liu

doi:10.11777/j.issn1000-3304.2025.25157

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Thread-type Core-Shell Polypyrrole@Polyurethane Fiber for Wearable Strain Sensor

Research Article | 更新时间：2026-02-01

- Thread-type Core-Shell Polypyrrole@Polyurethane Fiber for Wearable Strain Sensor
- Acta Polymerica Sinica Vol. 57, Issue 2, Pages: 530-540(2026)
- 作者机构：
  
  嘉兴大学全省生物基健康功能纤维材料重点实验室嘉兴 314001
- 作者简介：
  
  Lian-mei Liu, E-mail: lmliu@zjxu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2025.25157
  CLC：
- CSTR：32057.14.GFZXB.2025.7461
- Received：28 June 2025，
  
  Accepted：25 August 2025，
  
  Published Online：28 October 2025，
  
  Published：20 February 2026
- 稿件说明：
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肖礼宏, 程娜, 谢胜, 刘连梅. 螺纹结构聚吡咯/聚氨酯复合纤维的制备及其可穿戴应变传感性能研究. 高分子学报, 2026, 57(2), 530-539.

Xiao, L. H.; Cheng, N.; Xie, S.; Liu, L. M. Thread-type core-shell polypyrrole@polyurethane fiber for wearable strain sensor. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 530-539.
肖礼宏, 程娜, 谢胜, 刘连梅. 螺纹结构聚吡咯/聚氨酯复合纤维的制备及其可穿戴应变传感性能研究. 高分子学报, 2026, 57(2), 530-539. DOI： 10.11777/j.issn1000-3304.2025.25157. CSTR： 32057.14.GFZXB.2025.7461.

Xiao, L. H.; Cheng, N.; Xie, S.; Liu, L. M. Thread-type core-shell polypyrrole@polyurethane fiber for wearable strain sensor. Acta Polymerica Sinica (in Chinese), 2026, 57(2), 530-539. DOI： 10.11777/j.issn1000-3304.2025.25157. CSTR： 32057.14.GFZXB.2025.7461.

摘要

本工作采用化学原位聚合法，在预拉伸聚氨酯(PU)纤维基体上成功构筑了高度有序的螺纹结构聚吡咯(PPy)层. 得益于该特殊结构，所制得的核壳聚吡咯/聚氨酯(PPy@PU)复合导电纤维，克服了PPy薄膜的脆性，展现出良好的柔性和可拉伸性，在200%应变下，结构依然可以恢复完整. 优化后的复合纤维作为可穿戴应变传感器，表现出高灵敏度(GF约为12.4@200%)、快速响应(500 mm/min)及优异的耐久性(100%应变下200次循环). 此外，基于PPy@PU设计的可穿戴应变传感器可满足不同的人体运动检测需求(如手指弯曲和肘部伸展)，在可穿戴电子和智能纤维领域具有很好的应用潜力.

Abstract

A novel thread-type core-shell polypyrrole@polyurethane (PPy@PU) fiber was fabricated

via in situ

polymerization of PPy on pre-stretched PU fiber

and applied as a durable

flexible

stretchable

conductive strain sensor for the first time. Benefiting from the highly ordered continuous stretchable structure

thread-type core-shell structure can effectively buffer the dramatic deformation and maintain the structure integrity of PPy@PU fiber

resulting in stable conductivity during the stretching/releasing cycles. The variations in morphology and chemical structures

stretchability

and conductivity as well as the sensitivity of resistance change under st

retching cycles were investigated. The optimized PPy@PU fiber presents advantages of large detecting strain up to 200%

high gauge factor of about 12.4 at 200%

and can detect changes as fast as 500 mm/min

long durability of 200 cycling times. Furthermore

the advantages of thread PPy@PU fiber were then used to construct a prototype of wearable sensor to detect finger's bending and elbow's extension which exhibited its great potential applications as wearable devices and smart fabrics.

关键词

Keywords

references

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