Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (01): 56-62.doi: 10.13475/j.fzxb.20190101908

• Textile Engineering • Previous Articles     Next Articles

Preparation and properties of carbon fiber/polyester electrocardiogram monitoring embroidery electrode

DONG Ke1, LI Siming1, WU Guanzheng1, HUANG Hongrong2, LIN Zhongshi2, XIAO Xueliang1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Shenzhen Institute for Drug Control(Shenzhen Testing Center of Medical Devices), Shenzhen, Guangdong 518057, China
  • Received:2019-01-10 Revised:2019-10-24 Online:2020-01-15 Published:2020-01-14
  • Contact: XIAO Xueliang E-mail:xiao_xueliang@jiangnan.edu.cn

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Abstract:

Aiming at the preparation of a biocompatible human electrocardiogram (ECG) monitoring electrode for wearable electronic clothing for medical care, a new carbon fiber/polyester embroidery fabric electrode was developed by embroidering carbon fiber/polyester composite filaments to form a conductive material. The electrical properties and cytotoxicity of the electrodes were tested and analyzed. A self-developed wearable belt ECG monitoring system was used to evaluate the quality of the human body ECG signal collected by the carbon fiber/polyester fabric electrodes in comparison with silver-plated polyamide/polyester embroidery electrodes. The results demosntrate that the silver plated electrodes had better electrical properties, but for long-term ECG signal monitoring the impedance of the carbon fiber/polyester electrodes appeared to have similar performance to that of the silver plated electrodes. Compared with the medical gel electrode, the ECG signals collected from the two types of embroidery electrodes demonstrate good quality, meeting the needs for medical diagnosis. Cytotoxicity test revealed that silver-plated electrodes were highly cytotoxic with a cell survival rate of only 3%, whilst for the carbon based electrodes the cell survival rate was 107% with nil cytotoxicity. The research show that the embroidery carbon based electrodes have good biocompatibility and meets the test standard of medical materials in vitro.

Key words: fabric electrode, carbon fiber/polyester composite filament, wearable monitoring system, electrocardiogram signal, biocompatibility, medical health

CLC Number: 

  • TS101.4

Fig.1

Sliced yarn image under microscope. (a) Carbon fiber/polyester filament cross section;(b) Silver-plated polyamide/polyester filament cross section"

Fig.2

Embroidered fabric electrode. (a) Schematic diagram of embroidered fabric electrode;(b) Embroidered electrode"

Tab.2

Embroidery process parameters"

织物电极 针迹
类型		 针迹
长度/
mm		 针迹
间距/
mm		 针速/
(r·min-1)
碳纤维/
涤纶刺绣电极		 直线针 5 1.5 500
镀银锦纶/
涤纶刺绣电极		 直线针 5 1.5 500

Fig.3

Impedance test. (a) Model diagram;(b) Equivalent circuit diagram"

Fig.4

Skin-electrode impedance test. (a) Schematic diagram of testing principle; (b) Test method"

Fig.5

Wearable ECG acquisition system. (a) Wearable ECG signal monitoring system; (b) Belt wearable ECG collection clothing"

Fig.6

Cell morphology in leaching solution under microscope. (a) Silver-plated polyamide/polyester embroidery electrode;(b) Carbon fiber/polyester embroidery electrode;(c) Negative control group"

Fig.7

Test result of body skin-electrode impedance"

Fig.8

ECG signals collected by fabric electrodes. (a) Gel electrode; (b) Carbon fiber/polyester embroidery electrode; (c) Silver-plated polyamide/polyester embroidery electrode"

Tab.3

ECG monitoring and performance analysis comparisons between each electrode"

电极名称 QRS-波群 P-波 T-波 R-波振幅 稳定时间 R-波振幅变化 分数
合计
实际 分数 实际 分数 实际 分数 实际/mV 分数 实际/s 分数 实际/mV 分数
凝胶粘贴电极 存在 2 存在 2 存在 2 2.40 2 ≤10 1 0.06 1 10
碳纤维/
涤纶刺绣电极		 存在 2 存在 2 存在 2 2.08 1 12.3 0 0.12 0 7
镀银锦纶/
涤纶刺绣电极		 存在 2 存在 2 存在 2 2.11 1 ≤10 1 0.18 0 8
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