Polymerization of Microwrinkled Pyrrole Layer and Its Enhancement on Performances of Flexible Piezoresistive Sensors with Interlocked Micropillar Arrays

Hu-cheng Zhang; Han-xiong Huang

doi:10.11777/j.issn1000-3304.2024.24289

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Polymerization of Microwrinkled Pyrrole Layer and Its Enhancement on Performances of Flexible Piezoresistive Sensors with Interlocked Micropillar Arrays

Research Article | 更新时间：2025-06-17

- Polymerization of Microwrinkled Pyrrole Layer and Its Enhancement on Performances of Flexible Piezoresistive Sensors with Interlocked Micropillar Arrays
- Acta Polymerica Sinica Vol. 56, Issue 5, Pages: 800-809(2025)
- 作者机构：
  
  华南理工大学广东省高分子先进制造技术及装备重点实验室微/纳成型与流变学研究室广州 510640
- 作者简介：
  
  Han-xiong Huang, E-mail: mmhuang@scut.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2024.24289
  CLC：
- CSTR：32057.14.GFZXB.2024.7340
- Received：04 December 2024，
  
  Accepted：31 December 2024，
  
  Published Online：21 March 2025，
  
  Published：20 May 2025
- 稿件说明：
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张虎诚, 黄汉雄. 微褶皱吡咯层的聚合及提高互锁微柱阵列柔性压阻传感器的性能. 高分子学报, 2025, 56(5), 800-809

Zhang, H. C.; Huang, H. X. Polymerization of microwrinkled pyrrole layer and its enhancement on performances of flexible piezoresistive sensors with interlocked micropillar arrays. Acta Polymerica Sinica, 2025, 56(5), 800-809
张虎诚, 黄汉雄. 微褶皱吡咯层的聚合及提高互锁微柱阵列柔性压阻传感器的性能. 高分子学报, 2025, 56(5), 800-809 DOI： 10.11777/j.issn1000-3304.2024.24289. CSTR： 32057.14.GFZXB.2024.7340.

Zhang, H. C.; Huang, H. X. Polymerization of microwrinkled pyrrole layer and its enhancement on performances of flexible piezoresistive sensors with interlocked micropillar arrays. Acta Polymerica Sinica, 2025, 56(5), 800-809 DOI： 10.11777/j.issn1000-3304.2024.24289. CSTR： 32057.14.GFZXB.2024.7340.

摘要

采用化学氧化法，在模压成型的微柱阵列乙烯-辛烯共聚物(POE)薄片表面上聚合吡咯(Py)导电层，制得传感基片；将2片微柱阵列传感基片面对面封装成柔性互锁压阻传感器. 扫描电镜观察、红外光谱测试和表面电阻率测试的结果表明，对Py聚合时间30 min制备的传感基片，微柱和底部表面上形成了完整的聚吡咯导电层且其表面呈较明显的蠕虫状微褶皱结构. 所封装的互锁压阻传感器呈现较高的循环响应稳定性和重复性以及较宽的响应范围，这归因于互锁微柱较高的耐压性和相互支撑以及POE较高的回弹性. 更为重要的是，互锁传感器呈现较短的响应/恢复时间(30/41 ms)、较低的检测限(~10 Pa)和较高的灵敏度，这归因于微柱表面上形成的微褶皱二级结构. 互锁压阻传感器用于检测人体微弱生理信号(如手腕/颈部脉搏、脸部动作)和较高压力场景(如足底压力)时均呈现很好的响应效果，表明其在健康监测和运动检测方面具有良好的应用前景.

Abstract

Poly(ethylene-

-octene) (POE) slices with micropillar arrays on their surfaces were prepared by compression molding

then conductive pyrrole (Py) layer was polymerized on the slices to obtain sensing substrates by Py polymerization. Two sensing substrates with the micropillar arrays were assembled into a flexible interlocked piezoresistive sensor face to face. For the sensing substrate prepared at 30 min polymerization time

complete conductive polypyrrole (PPy) layer is developed at the micropillars and on the base surface of the sensing substrate

and more obvious worm-shaped microwrinkles appear on the PPy layer

which are confirmed by scanning electron microscope observation

infrared spectrum test and surface resistivity test. The interlocked piezoresistive sensor exhibits higher cyclic response stability and repeatability and wider pressure response range

which are attributed to higher pressure resistance and mutual support of the interlocked micropillars as well as higher

resilience of POE. More importantly

the interlocked sensors have shorter response/recovery time (30/41 ms)

lower detection limit (~10 Pa)

and higher sensitivity

which are attributed to the secondary microwrinkles developed at the micropillars. The interlocked piezoresistive sensor exhibit good responses when applied to detect weak physiological signals (

e.‍g.

wrist/carotid pulse and facial movement) and higher-pressure scenario (

e.‍g.

plantar pressure)

demonstrating its good application prospect in health monitoring and motion detection.

关键词

Keywords

references

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Related Institution

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