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Stretchable strain sensors based on conductive coating cracks with improved interfacial adhesion by wet phase separation treatment
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2020-03-30 , DOI: 10.1007/s11998-020-00336-1
Wei Luo , Wutong Fei , Longying Yang , Yong Chen , Youyi Wen

Stretchable strain sensors have drawn plenty of attention due to their importance and necessity in high-technology areas. In this study, we fabricated a series of thermoplastic polyurethane (TPU) film-based stretchable strain sensors with a conductive hybrid sensing layer of reduced graphene oxide (RGO) and multiwalled carbon nanotubes (CNT) by simple coating methods. Meanwhile, we developed a kind of roughening method based on wet phase separation to form interpenetrating micropores on the surface of the TPU film, which overcomes the sliding and overlapping of the RGO/CNT sensing layer by improving the mechanical interlocking between the hybrid sensing layer and the elastic substrate. Owing to the improved adhesion between the sensing layer and the elastomeric substrate, the stretchable sensor shows good sensitivity (gauge factor (GF) = 75 at 50% strain), linearity (logarithmic GF = 10 during 0–50% strain), and stability (more than 1000 stretching–releasing cycles at a strain of 50%). These high performances suggest the potential application of our strain sensor in the detection of human body movements, personal health monitoring, and other kinds of human–machine interfaces.



中文翻译:

基于导电涂层裂纹的可拉伸应变传感器,通过湿相分离处理改善了界面附着力

可拉伸应变传感器由于其在高科技领域的重要性和必要性而备受关注。在这项研究中,我们通过简单的涂覆方法制造了一系列基于热塑性聚氨酯(TPU)薄膜的可拉伸应变传感器,该传感器具有氧化石墨烯(RGO)和多壁碳纳米管(CNT)的导电混合传感层。同时,我们开发了一种基于湿相分离的粗糙化方法,在TPU膜的表面形成互穿的微孔,通过改善混合传感层与金属之间的机械互锁,克服了RGO / CNT传感层的滑动和重叠。弹性基底。由于传感层和弹性体基材之间的粘合性得到了改善,可拉伸传感器显示出良好的灵敏度(在50%应变下,应变系数(GF)= 75),线性(在0–50%应变下对数GF = 10)和稳定性(在50%应变下超过1000个拉伸-释放循环) )。这些高性能表明我们的应变传感器在人体运动检测,个人健康监测以及其他类型的人机界面中的潜在应用。

更新日期:2020-03-30
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