柔性压阻式压力传感器的研究进展

柔性压阻式压力传感器作为柔性压力传感器的重要分支,具有结构简单、灵敏度高、工作范围大、响应速度快及稳定性高等特点,在人类运动行为探测、健康监测、仿生电子皮肤开发及人机交互等领域均具有潜在发展需求.但是截至目前,如何同时实现低成本、高性能、低能耗和自驱动仍旧是柔性压阻式压力传感器未来所面临的挑战,而新型传感机制的开发、新型功能化纳米材料的融合及柔性器件的新型制备工艺将是未来发展的方向.本文综述了近年来柔性压阻式压力传感器的研究进展,从传感机制出发,对柔性压阻式压力传感器的活性层材料种类和微结构设计类型进行了总结,最后对其未来的潜在应用进行了展望.     

High microwave absorption performances for single-walled carbon nanotube–epoxy composites with ultra-low loadings

Microwave-absorbing polymeric composites based on single-walled carbon nanotubes(SWNTs) are fabricated via a simple yet versatile method, and these SWNT–epoxy composites exhibit very impressive microwave absorption performances in a range of 2 GHz–18 GHz. For instance, a maximum absorbing value as high as 28 dB can be achieved for each of these SWNT–epoxy composites(1.3-mm thickness) with only 1 wt% loading of SWNTs, and about 4.8 GHz bandwidth,corresponding to a microwave absorption performance higher than 10 dB, is obtained. Furthermore, such low and appropriate loadings of SWNTs also enhance the mechanical strength of the composite. It is suggested that these remarkable results are mainly attributable to the excellent intrinsic properties of SWNTs and their homogeneous dispersion state in the polymer matrix.