Muhammad Waqar, Kim Sam-Dong
Division of Electronics and Electrical Engineering, Dongguk University, Seoul 100-175, Republic of Korea.
Polymers (Basel). 2023 Mar 30;15(7):1714. doi: 10.3390/polym15071714.
We present highly stretchable polypyrrole (PPy)/polydimethylsiloxane strain sensors of highly improved sensitivity and durability fabricated by a chemical oxidative polymerization with oxygen plasma treatment (O PT). In this study, O PT was performed for 30, 60, and 90 s at each growth stage of the PPy film in three steps to investigate the effects on the sensor performance as well as the microstructural properties of the PPy films. Bonding characteristics with underlying layers and resistance to microcrack generation of the multi-layer PPy films under our given strained state were significantly enhanced by the O PT. The best sensor performance in terms of sensitivity and stability were achieved by PT for 30 s with a maximum gauge factor of ~438 at a uniaxial strain of 50%, excellent durability over 500 stretching/release cycles, and a fast response time of ~50 ms.
我们展示了通过化学氧化聚合结合氧等离子体处理（OPT）制备的、灵敏度和耐久性得到极大提高的高拉伸性聚吡咯（PPy）/聚二甲基硅氧烷应变传感器。在本研究中，在PPy薄膜的每个生长阶段分三步进行30、60和90秒的OPT处理，以研究其对传感器性能以及PPy薄膜微观结构特性的影响。OPT显著增强了多层PPy薄膜在给定应变状态下与底层的结合特性以及抗微裂纹产生的能力。在灵敏度和稳定性方面表现最佳的传感器是经过30秒OPT处理的，在50%的单轴应变下最大应变系数约为438，在500次拉伸/释放循环中具有出色的耐久性，响应时间约为50毫秒。
