聚乳酸基纤维界面对化学聚合聚吡咯压力传感器的影响

李丽; 林烁; 张伟华; 刘庆华

doi:10.14028/j.cnki.1003-3726.2024.24.155

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聚乳酸基纤维界面对化学聚合聚吡咯压力传感器的影响

研究论文 | 更新时间：2024-11-20

- 聚乳酸基纤维界面对化学聚合聚吡咯压力传感器的影响
- Effect of Interface on Polylactic Acid-based Chemically Polymerized Polypyrrole Pressure Sensors
- 高分子通报 2024年37卷第11期页码：1628-1635
- 作者机构：
  
  菏泽学院化学化工学院，菏泽 274015
- 作者简介：
  
  *刘庆华，E-mail: liuqinghua-126@126.com
- 基金信息：
  
  山东省自然科学基金(ZR2022QB132;ZR2021QB203);菏泽学院博士基金(XY21BS19;XY21BS18)
- DOI：10.14028/j.cnki.1003-3726.2024.24.155
  中图分类号：
- 纸质出版日期：2024-11-20，
  
  网络出版日期：2024-08-13，
  
  收稿日期：2024-05-20，
  
  录用日期：2024-07-16
- 稿件说明：
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李丽, 林烁, 张伟华, 刘庆华. 聚乳酸基纤维界面对化学聚合聚吡咯压力传感器的影响. 高分子通报, 2024, 37(11), 1628–1635

Li, L.; Lin, S.; Zhang, W. H.; Liu, Q. H. Effect of interface on polylactic acid-based chemically polymerized polypyrrole pressure sensors. Polym. Bull. (in Chinese), 2024, 37(11), 1628–1635
李丽, 林烁, 张伟华, 刘庆华. 聚乳酸基纤维界面对化学聚合聚吡咯压力传感器的影响. 高分子通报, 2024, 37(11), 1628–1635 DOI： 10.14028/j.cnki.1003-3726.2024.24.155.

Li, L.; Lin, S.; Zhang, W. H.; Liu, Q. H. Effect of interface on polylactic acid-based chemically polymerized polypyrrole pressure sensors. Polym. Bull. (in Chinese), 2024, 37(11), 1628–1635 DOI： 10.14028/j.cnki.1003-3726.2024.24.155.

摘要

本文通过静电纺丝法制备出了左旋聚乳酸(PLLA)、PLLA/聚吡咯(PPy)和PLLA/聚环氧乙烷(PEO)纤维膜，然后利用化学聚合法在上述薄膜表面制备导电PPy薄膜，并将上述样品制备成压阻式柔性压力传感器，研究其传感性能。研究发现，通过控制纤维的组成成分，可以调控PPy的沉积形貌及电导率，并影响传感器性能。其中，PLLA纤维膜具有强疏水性，PPy膜包覆在纤维四周或纤维间出现结膜现象，与PLLA纤维膜复合效果差，部分纤维表面上不能沉积PPy，四探针法测得其电导率仅为0.002 S/cm。PLLA/PPy纤维膜亲水性较好，可在其纤维周围形成表面光滑、连续致密的PPy膜，PPy与PLLA/PPy纤维膜的复合效果远高于PLLA纤维膜，电导率为0.51 S/cm。PLLA/PEO纤维膜亲水性最强，且PEO溶于水可增加纤维表面的粗糙度，利于吸附吡咯单体进行聚合，生成颗粒状的、连续的PPy膜，电导率为0.62 S/cm。这种表面形成的颗粒状微结构提高了形变能力，制备成压阻式柔性压力传感器时的传感性能最优异。

Abstract

In this study

poly(L‑lactic acid) (PLLA)

PLLA/polypyrrole (PPy) and PLLA/poly(ethylene oxide) (PEO) fiber films were prepared by electrospinning

and conductive PPy films were prepared on the surfaces of these films by chemical polymerization. Finally

the samples were prepared into piezoresistive flexible pressure sensors to study their sensing properties. It was found that by controlling the composition of the fiber

the deposition morphology and conductivity of PPy could be regulated

and the performance of the sensor could be affected. Among them

PLLA fiber membranes have strong hydrophobicity

and conjunctival phenomena occur around or between the fibers of PPy membrane. The composite effect with the PLLA fiber membrane is poor

and PPy cannot be deposited on the surface of some fibers. The conductivity measured using the four-probe method is only 0.002 S/cm. PLLA/PPy fiber membrane has good hydrophilicity

and can form a smooth

continuous and dense PPy membrane around its fibers. The composite effect of the PPy and PLLA/PPy fiber membranes is much higher than that of the PLLA fiber membrane

with the conductivity of 0.51 S/cm. The PLLA/PEO fiber membrane has the strongest hydrophilicity

and PEO soluble in water can increase the surface roughness of the fiber

which is conducive to the adsorption of pyrrole monomer for polymerization

and the formation of granular and continuous PPy membrane with a conductivity of 0.62 S/cm. The granular microstructure formed on this surface improves the deformation ability

and the sensing performance is the best when prepared as a piezoresistive flexible pressure sensor.

关键词

静电纺丝膜聚吡咯形貌电导率压阻式柔性压力传感器

Keywords

Electrospinning filmPolypyrroleMorphologyConductivityPiezoresistive flexible pressure sensor

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