用于心电信号捕捉的高性能棉/银复合织物电极

High performance cotton/silver composite fabric electrode for capturing Electrocardiogram signals

摘要:

导电织物在可穿戴电子领域前景广阔,但在使用过程的稳定性仍需提高。通过缩合反应,在棉织物(CF)上接枝了γ-巯丙基三甲氧基硅烷(MPTS),再利用化学镀的方式沉积银颗粒,制备出棉/银复合织物电极(Ag/M-CF)。Ag/M-CF的表面方阻低至0.04 Ω/sq,而且在多个方面(洗涤、拉伸、弯曲和氧化)都有良好的稳定性。洗涤200次后,表面方阻仅为1.88 Ω/sq,导电性能良好,满足实际需要；拉伸5%后,表面方阻仅为1.00 Ω/sq；经过3000次弯曲后,Ag/M-CF的表面方阻增加至1.38 Ω/sq；在恒温恒湿环境中放置9周后,表面方阻仅为0.50 Ω/sq。将洗涤前后的Ag/M-CF植入智能服装中,都能成功捕捉到人体在运动状态下的心电信号,而且测得的心率几乎相同。除此之外,Ag/M-CF还具有良好的机械性能和抗菌性。关键词：织物电极；洗涤稳定性；弯曲性能；耐氧化性能；心电图中图分类号：TS195.5 文献标识码： A 文章编号：1003-5214 (2020) 01-0000-00

Abstract:

Conductive fabrics have broad prospects in the field of wearable electronics, however, the stability in the use process still needs to be improved. Cotton fabric (CF) was grafted by condensation reaction γ- Mercaptopropyltrimethoxysilane (MPTS), and then silver particles were deposited by electroless plating to prepare cotton fabric electrode (Ag/M-CF). The surface square resistance of Ag/M-CF is as low as 0.04 Ω/sq, and it has good stability in many aspects (washing, stretching, bending and oxidation). After 200 washing cycles, the surface resistance is only 1.88 Ω/sq, which meets the actual application requirement; after 5% stretching, the surface square resistance is only 1.00 Ω/sq; after 3000 bending cycles, the surface square resistance of Ag/M-CF increases to 1.38 Ω/sq; after 9 weeks in constant temperature and humidity environment, the surface square resistance is only 0.50 Ω/sq; When Ag/M-CF before and after washing is implanted into smart clothing, the electrocardiogram (ECG) signal of human body in motion can be successfully captured, and the measured heart rate is almost the same. In addition, Ag/M-CF also has good mechanical properties and antibacterial properties.