基于聚多巴胺修饰的聚吡咯导电织物制备与应变传感性能

为改善聚吡咯(PPy)导电层与织物基底的结合牢度,提高应变传感器的稳定性,以聚多巴胺为粘合剂,采用原位聚合法制备聚吡咯/聚多巴胺(PPy/PDA)导电涤纶/氨纶织物,探究PPy/PDA导电涤纶/氨纶织物的导电性能和应变传感性能。用扫描电子显微镜、傅里叶变换红外光谱分析其表面形貌与结构,采用实验室自制的KTC传感器测试盒,测试其灵敏度和稳定性。结果表明,与PPy导电涤纶/氨纶织物相比,PPy/PDA导电涤纶/氨纶织物表面导电层更均匀,导电填料与基底的结合牢度更高,制得的传感元件灵敏度高,在500次重复应变后的稳定性更好,可应用于人体运动检测和康复训练等领域。

Preparation and strain sensing of dopamine-modified polypyrrole conductive fabric

In order to improve the binding strength of the polypyrrole(PPy) conductive layer to fabric substrate and the stability of sensors, a polypyrrole/polydopamine (PPy/PDA) conductive polyester/polyurethane fabric was prepared by in-situ polymerization with dopamine as binder, followed by an investigation of the conductive and strain sensing properties of such fabric. The morphology and structure were analyzed by scanning electron microscope and Fourier transform infrared spectroscopy and the sensitivity, repeatability and stability were tested by the self-made KTC Resp Sensor box. The results show that compared with the PPy conductive fabric, the PPy/PDA conductive polyester/polyurethane fabric has a more uniform conductive layer and higher binding strength. The sensing element prepared from this fabric has higher sensitivity and the senser retains good stability after 500 repetitions and can be used for human movement detection and rehabilitation training.