Wang Zhenyu, Zhang Qiang, Yue Yunong, Xu Jiawen, Xu Wei, Sun Xinhu, Chen Yanqiu, Jiang Jin, Liu Yu
School of Mechanical Engineering, Jiangnan University, Wuxi, People's Republic of China. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi, People's Republic of China.
Nanotechnology. 2019 Aug 23;30(34):345501. doi: 10.1088/1361-6528/ab1287. Epub 2019 Mar 22.
Materials with tunable and high strain sensitivities have a great potential to be used in next generation flexible electronic devices. Conventional methods, which focus on tailoring the material composition to obtain controllable sensitivities, face the issues of complicated fabrication process and instability, restricting their use in real applications. In this work, we propose the idea of tuning the sensitivities through precisely controlled micro-structures. Based on 3D printing technique, we successfully fabricate graphene/polydimethylsiloxane composites with long range ordered porous structures. The resultant composites present tunable and high gauge factors, along with excellent durability. The tunable sensitivity comes from different strain distributions on the composites under stretching, arising from the different micro-structures constructed. Taking full advantage of the composites in terms of sensitivity and durability, we demonstrate the application of the 3D printed porous sensors as wearable human motion detectors.
具有可调谐和高应变灵敏度的材料在下一代柔性电子设备中具有巨大的应用潜力。传统方法侧重于调整材料成分以获得可控的灵敏度，但面临制造工艺复杂和稳定性差的问题，限制了它们在实际应用中的使用。在这项工作中，我们提出了通过精确控制微观结构来调整灵敏度的想法。基于3D打印技术，我们成功制备了具有长程有序多孔结构的石墨烯/聚二甲基硅氧烷复合材料。所得复合材料具有可调谐的高应变系数以及出色的耐久性。可调谐灵敏度源于拉伸时复合材料上不同的应变分布，这是由构建的不同微观结构引起的。充分利用复合材料在灵敏度和耐久性方面的优势，我们展示了3D打印多孔传感器作为可穿戴人体运动探测器的应用。
