Song Jiapeng, Wang Guangren, Chen Long, Zhang Chuchu, Zan Ruhao, Wang Zhao, Rao Zhenggang, Fei Linfeng
School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices, School of Microelectronics, Hubei University, Wuhan, Hubei 430062, China.
J Colloid Interface Sci. 2025 Jan;677(Pt A):512-520. doi: 10.1016/j.jcis.2024.07.231. Epub 2024 Jul 31.
Aerogel-based conductive materials have emerged as a major candidate for piezoresistive pressure sensors due to their excellent mechanical and electrical performance besides light-weighted and low-cost characteristics, showing great potential for applications in electronic skins, biomedicine, robot controlling and intelligent recognition. However, it remains a grand challenge for these piezoresistive sensors to achieve a high sensitivity across a wide working temperature range. Herein, we report a highly flexible and ultra-light composite aerogel consisting of aramid nanofibers (ANFs) and reduced graphene oxide flakes (rGOFs) for application as a high-performance pressure sensing material in a wide temperature range. By controlling the orientations of pores in the composite framework, the aerogel promotes pressure transfer by aligning its conductive channels. As a result, the ANFs/rGOFs aerogel-based piezoresistive sensor exhibits a high sensitivity of up to 7.10 kPa, an excellent stability over 12,000 cycles, and an ultra-wide working temperature range from -196 to 200 °C. It is anticipated that the ANFs/rGOFs composite aerogel can be used as reliable sensing materials in extreme environments.
基于气凝胶的导电材料因其优异的机械和电学性能以及轻质、低成本的特点，已成为压阻式压力传感器的主要候选材料，在电子皮肤、生物医学、机器人控制和智能识别等领域显示出巨大的应用潜力。然而，对于这些压阻式传感器来说，在宽工作温度范围内实现高灵敏度仍然是一个巨大的挑战。在此，我们报道了一种由芳纶纳米纤维（ANFs）和还原氧化石墨烯片（rGOFs）组成的高柔韧性、超轻复合气凝胶，用作宽温度范围内的高性能压力传感材料。通过控制复合框架中孔隙的取向，气凝胶通过排列其导电通道促进压力传递。结果，基于ANFs/rGOFs气凝胶的压阻式传感器表现出高达7.10 kPa的高灵敏度、超过12000次循环的优异稳定性以及从-196到200°C的超宽工作温度范围。预计ANFs/rGOFs复合气凝胶可在极端环境中用作可靠的传感材料。
