Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor

CHEN Juan; SHENG Bin; CHEN Shangbi; XIAO Jieyu; XIONG Yan

doi:10.13873/J.1000-9787(2021)04-0004-04

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Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor

更新时间：2025-09-11

- Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor
- Issue 4, Pages: 4-7(2021)
- 作者机构：
  
  1. 上海理工大学光电信息与计算机工程学院
  2. 上海市现代光学系统重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2021)04-0004-04
  CLC： TP212;TQ340.64
- Published：2021
- 稿件说明：
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CHEN Juan, SHENG Bin, CHEN Shangbi, et al. Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor[J]. 2021, (4): 4-7.
DOI：

CHEN Juan, SHENG Bin, CHEN Shangbi, et al. Coaxial wet spinning carbon black-silica gel composite inner coating flexible fiber strain sensor[J]. 2021, (4): 4-7. DOI： 10.13873/J.1000-9787(2021)04-0004-04.

摘要

通过同轴湿纺技术制备了一种多层中空结构的柔性纤维应变传感器。外层是由硅胶(Ecoflex)材料制成的弹性基底层

内层是由炭黑/聚二甲基硅氧烷(CB/PDMS)复合材料制成的导电层。中空结构由CB/PDMS/CHCl3混合物受热时CHCl3挥发所致。同时由于CB/PDMS复合材料涂层产生了裂纹结构

增强了该中空纤维的应变灵敏度(GF)

内涂层随拉伸出现了明显的断开—回复现象。实验表明:当加入的CHCl3与PDMS体积比为3︰1时

CB-Ecoflex纤维具有最高的灵敏度

GF值为7.14

与无裂纹CB-Ecoflex纤维相比提高了约6倍。并对人体运动监测方面进行了研究

发现CB-Ecoflex纤维对人体的运动显示了良好的响应特性。此方法为可穿戴电子器件的制备提供了一种新路径。

Abstract

A flexible fiber strain sensor with multi-layer hollow structure is prepared by coaxial wet spinning technology.The outer layer is an elastic substrate layer made of pure Ecoflex material

and the inner layer is a conductive layer made of carbon black/polydimethylsiloxane（ CB）/PDMS composite material.The hollow structure is caused by volatilization of CHCl3 when the CB/PDMS/CHCl3 mixture is heated.Simultaneously

the CB/PDMS composite coating produces a cracked structure

which enhances the gauge factor（ GF） of the hollow fiber

the inner coating shows obvious disconnection-recovery phenomenon with stretching.Experiments show that when the volume ratio of added CHCl3 to PDMS is 3: 1

the CB-Ecoflex fiber has the highest sensitivity.The GF value is 7.14

which is compared with non-cracked CB-Ecoflex fiber improved by about six times.Research on human motion monitoring is carried out

and it is found that CB-Ecoflex fiber show good response characteristics to human motion.The flexible strain sensor prepared by this method provides a new path for the preparation of wearable electronic devices.

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