High-sensitivity, fast-response flexible pressure sensor for electronic skin using direct writing printing.
High-sensitivity, fast-response flexible pressure sensor for electronic skin using direct writing printing.
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具有人体感知功能的仿生电子皮肤在医疗健康诊断、可穿戴电子、人机交互、仿生假肢等领域有着广泛的应用前景。电子皮肤触觉压力传感器要求灵敏度高、分辨率好、响应速度快，能够感知不同的压力刺激。特别是在宽压强检测和敏感单元微结构的制备方面仍存在很大挑战。本文提出了一种基于韦森伯格直写印刷原理在PDMS基片上制备GNP/MWCNT填充导电复合材料柔性压力传感器的方法。通过正交实验，研究了平台移动速度、微针转速和直写次数对压敏结构线宽的影响，得到了最佳直写印刷参数。对S形波纹管压力传感器的性能进行了测试，其灵敏度可达0.164 kPa-1，响应/恢复时间分别为100 ms和100 ms。通过对不同质量物体和平面/曲面物体的捕获实验，验证了其良好的灵敏度、稳定性和快速响应性能。这项工作可能为未来将高性能电子皮肤集成到智能机器人和假肢解决方案中铺平了道路。具有人体感知功能的仿生电子皮肤在医疗健康诊断、可穿戴电子、人机交互、仿生假肢等领域有着广泛的应用前景。
Bionic electronic skin with human sensory capabilities has attracted extensive research interest, which has been applied in the fields of medical health diagnosis, wearable electronics, human–computer interaction, and bionic prosthetics. Electronic skin tactile pressure sensing required high sensitivity, good resolution and fast response for sensing different pressure stimuli. In particular, there were still great challenges in the detection of wide pressure and the preparation of sensitive unit microstructures. Here, the direct-write printing of Weissenberg principle to fabricate GNPs/MWCNT filled conductive composite flexible pressure sensors on PDMS substrates was proposed. The effects of platform moving speed, microneedle rotation speed and the number of direct-write times on the line width of the pressure sensitive structure were investigated based on orthogonal experiments, and the optimal direct-write printing parameters were obtained. The performance of the S-shaped polyline pressure sensor was tested, in which the sensitivity could reached 0.164 kPa−1, and the response/recovery time was 100 ms and 100 ms respectively. The capture cases of objects of different quality and objects with flat/curved surfaces were successively demonstrated to exhibit its excellent sensitivity, stability and fast response performance. This work may paved the road for future integration of high-performance electronic skin in smart robotics and prosthetic solutions. Bionic electronic skin with human sensory capabilities has attracted extensive research interest, which has been applied in the fields of medical health diagnosis, wearable electronics, human–computer interaction, and bionic prosthetics.
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