Wang Lanmin, Luo Dan, Yang Ying, Wu Han, Peterson Joel, Gustafsson Stefan, Guo Li, Niu Xin, Liu Hao
School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Key Laboratory of Advanced Textile Composite Materials of Ministry of Education, Tiangong University, Tianjin 300387, China.
ACS Appl Mater Interfaces. 2025 Apr 9;17(14):20790-20805. doi: 10.1021/acsami.4c22905. Epub 2025 Mar 27.
Fabric electrodes are an important part of long-term medical-health-monitoring garments, but sweat corrosion can greatly affect their longevity and stability. In this study, the metal fabric biopotential sensor was chemically modified with 3-mercaptopropyltrimethoxysilane (MPTS). Ag/AgCl was formed on the electrode surface by constant voltage deposition. Ag/AgCl/3-Mercaptopropyltrimethoxysilane/silver-plated nylon electrodes (Ag/AgCl/MPTS/SPNE), Ag/AgCl/3-mercaptopropyltrimethoxysilane/silver-plated copper wire electrodes (Ag/AgCl/MPTS/SPCWE), and Ag/AgCl/3-mercaptopropyltrimethoxysilane/sterling silver yarn electrodes (Ag/AgCl/MPTS/SSYE) were prepared. Molecular dynamics (MD) simulations using Forcite were performed to investigate the anticorrosion mechanism of MPTS. The effects of the MPTS dip-coating time and chlorination parameters on the electrochemical properties were investigated. The corrosion resistance of the biopotential sensor was tested in simulated sweat and NaCl solutions. We analyzed the suitability of the biopotential sensor by the softness test, abrasion resistance test, washing resistance test, and motion noise resistance test. Ag/AgCl/MPTS/SSYE provides optimal corrosion resistance, comfort, motion noise resistance, and electrical properties. It can be used for wearable applications such as long-term electrocardiogram (ECG) signals, electromyogram (EMG) signals, and neuromuscular electrical stimulation (NMES).
织物电极是长期医疗健康监测服装的重要组成部分，但汗液腐蚀会极大地影响其寿命和稳定性。在本研究中，金属织物生物电位传感器用3-巯基丙基三甲氧基硅烷（MPTS）进行了化学改性。通过恒压沉积在电极表面形成Ag/AgCl。制备了Ag/AgCl/3-巯基丙基三甲氧基硅烷/镀银尼龙电极（Ag/AgCl/MPTS/SPNE）、Ag/AgCl/3-巯基丙基三甲氧基硅烷/镀银铜线电极（Ag/AgCl/MPTS/SPCWE）和Ag/AgCl/3-巯基丙基三甲氧基硅烷/纯银纱线电极（Ag/AgCl/MPTS/SSYE）。使用Forcite进行分子动力学（MD）模拟以研究MPTS的抗腐蚀机理。研究了MPTS浸涂时间和氯化参数对电化学性能的影响。在模拟汗液和NaCl溶液中测试了生物电位传感器的耐腐蚀性。我们通过柔软度测试、耐磨性测试、耐洗性测试和抗运动噪声测试分析了生物电位传感器的适用性。Ag/AgCl/MPTS/SSYE具有最佳的耐腐蚀性、舒适性、抗运动噪声性和电学性能。它可用于可穿戴应用，如长期心电图（ECG）信号、肌电图（EMG）信号和神经肌肉电刺激（NMES）。
