鲍哲南表示，该材料对下压和屈曲都非常敏感，因此未来的假肢在关节处将有更好的弯曲度。覆有该种材料的电气设备和电线也可自我修复，使电力维护变得不再困难和昂贵，尤其是在难以到达的地方，如建筑物墙壁或是车辆内。研究团队的下一个目标是使材料更透明和更具弹性，以适于电子设备或显示屏的包装和覆盖。作者: small 时间: 2012-11-14 09:00
An electrically and mechanically self-healing composite with pressure- and flexion-sensitive properties for electronic skin applications
Pressure sensitivity and mechanical self-healing are two vital functions of the human skin. A flexible and electrically conducting material that can sense mechanical forces and yet be able to self-heal repeatably can be of use in emerging fields such as soft robotics and biomimetic prostheses, but combining all these properties together remains a challenging task. Here, we describe a composite material composed of a supramolecular organic polymer with embedded nickel nanostructured microparticles, which shows mechanical and electrical self-healing properties at ambient conditions. We also show that our material is pressure- and flexion-sensitive, and therefore suitable for electronic skin applications. The electrical conductivity can be tuned by varying the amount of nickel particles and can reach values as high as 40 S cm−1. On rupture, the initial conductivity is repeatably restored with ~90% efficiency after 15 s healing time, and the mechanical properties are completely restored after ~10 min. The composite resistance varies inversely with applied flexion and tactile forces. These results demonstrate that natural skin's repeatable self-healing capability can be mimicked in conductive and piezoresistive materials, thus potentially expanding the scope of applications of current electronic skin systems.