AgNWs/PDMS柔性应变传感器的研制

Development of AgNWs/PDMS flexible strain sensor

应变传感器凭借其在个人电子设备和工业监控领域的广泛应用推动着现代社会科学技术的飞速发展。基于高分子材料的应变传感器具有可拉伸性及可弯曲性和低成本的独特优势,目前在人工智能系统和可穿戴医疗保健设备中的应用最为广泛。本文介绍了一种具有高灵敏度的柔性传感器;首先采用了多元醇还原法制备了银纳米线(AgNWs),然后以银纳米线作为中间层,聚二甲基硅氧烷(PDMS)作为包覆层制备具有三明治结构的传感器。将制备的银纳米线通过电子扫描显微镜进行形貌表征,发现AgNWs表面光滑,直径均匀,其长度在20μm左右,直径约为100 nm,长径比在200左右。采用万用电表与拉伸试验机协同工作来表征应变传感器的电阻-应变曲线,发现其响应灵敏,GF值为12.27。滞后性小,电阻与应变间具有较好的线性关系,电学性能的稳定性较高。

With its wide application in personal electronic equipment and industrial monitoring,strain sensors are driving the rapid development of modern social science and technology.Polymer-based strain sensors have the unique advantages of stretchability and bending property and low cost which are currently the most widely used in artificial intelligence systems and wearable healthcare devices.This paper introduced a flexible sensor with high sensitivity.Firstly,silver nanowires were prepared by polyol reduction method,and then made with sandwich structure sensor which was fabricated with AgNWs as the middle layler.The prepared silver nanowires(AgNWs)were characterized by scanning electron microscopy.It was found that the surface of AgNWs was smooth and uniform in diameter.The length of AgNWs was about 20μm,and the diameter was about 100 nm,while the aspect ratio was about 200.The multimeter and the tensile tester work together to characterize the resistance-strain curve of the strain sensor.It was found that its response was sensitive,the hysteresis was small.The linear relationship between resistance and strain was good,and the stability of electrical performance was high.