Ag-AgCl纺织结构电极电镀工艺参数的优化

Electroplating parameters optimization of Ag-AgCl textile-structured electrodes

以镀银纱线作为基础材料,采用电化学处理的方法对纤维表面进行氯化处理,形成氯化银包覆银的复合结构,该结构用于柔性心电电极的制作。为了设计优化的电镀参数,使得银-氯化银包覆纤维结构的电化学性能达到最佳,分别研究了处理时间、处理电压、溶液浓度、溶液温度等因素对纺织结构电极纤维材料阻抗的影响。同时,运用电化学阻抗谱并结合SEM观察纤维表面形态分析,得出了电镀工艺的最佳处理参数。研究结果表明:处理电压、处理时间以及连接方式对电极阻抗性能影响最大,氯化钠离子浓度、银纱线缠绕密度以及电极材质对电极阻抗性能影响较小,溶液温度以及极板间距离对电极阻抗性能影响极小。试验为设计纺织结构电极提供一定的实验依据,同时为银-氯化银纺织结构电极电镀工艺研究提供了新途径。

The electrochemical treatment is used to chloride the surface of the silvered yarn to form a sandwich silver-silver chloride structure. This material system is used in the flexible ECG electrodes. In order to achieve the optimal electrochemical properties, several factors affecting the impedance of textile-structured electrodes are investigated. To achieve this, the electroplating duration, applied voltage, electrolyte concentration, electroplating temperature, etc are analyzed. Electrochemical impedance spectroscopy and SEM analysis are employed to analyze the optimal electroplating parameters. It shows that： the treatment voltage, electroplating duration and the wiring circuit are the key faetors which effect the impedance. The sodium chloride concentration, density of yarn and material of electrodes show minor effect on impedance. The effect of solution temperature and the distance between the eleetrodes can be ignored. The experiment provided bases for the design of textile-structured electrodes.