Abstract Three-dimensional porous graphene foams have received increasing attention in the fields of sensors, flexible conductors, and energy storage. Mechanical stability, flexibility, and electrical conductivity are prerequisites for materials used in these fields. In this paper, novel polyimide-based graphene foam was prepared by dip-coating a polyimide foam template followed by chemical reduction and thermal reduction. The prepared foam displayed excellent mechanical stability and flexibility (elastic modulus: ∼5 kPa). The synergistic effects of chemical and thermal reduction led to a foam with high electrical conductivity of ∼0.4 S m−1. By controlling the dip-coating times, the foam achieved a high pressure sensitivity of 0.36 kPa−1. Experiments show that the prepared foam can be used as effective pressure sensor to measure heartbeat, joint activity, and airflow.

中文翻译：

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用于压力传感器应用的柔性、导电和高压敏石墨烯-聚酰亚胺泡沫

摘要 三维多孔石墨烯泡沫在传感器、柔性导体和储能领域受到越来越多的关注。机械稳定性、柔韧性和导电性是这些领域中使用的材料的先决条件。在本文中，通过浸涂聚酰亚胺泡沫模板，然后进行化学还原和热还原来制备新型聚酰亚胺基石墨烯泡沫。制备的泡沫显示出优异的机械稳定性和柔韧性（弹性模量：~5 kPa）。化学和热还原的协同效应导致泡沫具有约 0.4 S m-1 的高电导率。通过控制浸涂时间，泡沫实现了 0.36 kPa-1 的高压敏感性。实验表明，制备的泡沫可作为有效的压力传感器测量心跳，