Graphene/MXene Composite Aerogels Reinforced by Polyimide for Pressure Sensing
Graphene/MXene Composite Aerogels Reinforced by Polyimide for Pressure Sensing
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DOI：
10.1021/acsanm.1c03722
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发表时间：
2022-01
影响因子：
5.9
通讯作者：
Gaochuang Yang;Yawen Yang;Tiandi Chen;Jinqing Wang;Limin Ma;Shengrong Yang
中科院分区：
文献类型：
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作者：
Gaochuang Yang;Yawen Yang;Tiandi Chen;Jinqing Wang;Limin Ma;Shengrong Yang
本文以聚酰亚胺（PI）作为氧化石墨烯（GO）和MXene片的粘合剂和增强剂，制备了具有良好机械弹性、高导电性、优异热稳定性和可靠隔热能力的rGO/MXene/PI（GMP）复合气凝胶。GO、MXene纳米片和PI前体之间独特的物理和化学相互作用增强了气凝胶的三维网络框架。作为传感材料，通过定向冷冻制备的具有层-支柱网络结构的GMP气凝胶具有低密度（8.97-12.71 mg/cm 3）、高电导率（3.08 S/m）、显著的可逆压缩（90%）和优异的抗疲劳性（10，000次循环）。基于GMP复合气凝胶的压阻传感器可以快速检测微小的应变，这可以进一步用于脉搏跳动，呼吸，振动，手指弯曲等人体健康监测。在PI的辅助下，气凝胶还呈现出高的隔热性能（0.022 W/（m·k））和优异的耐低温性能（−196 °C），在许多领域显示出广泛的应用潜力。
Here, polyimide (PI) was introduced as a binder and enhancer of graphene oxide (GO) and MXene sheets to prepare robust rGO/MXene/PI (GMP) composite aerogels with good mechanical elasticity, high conductivity, excellent thermal stability, and reliable heat insulation ability. The unique physical and chemical interactions among GO, MXene nanosheets, and the PI precursor enhance the three-dimensional network framework of aerogels. As a sensing material, the GMP aerogel with a layer-strut network structure prepared by directional freezing has a low density (8.97–12.71 mg/cm3), high conductivity (3.08 S/m), significant reversible compression (90%), and excellent fatigue resistance (10,000 cycles). The piezoresistive sensor based on the GMP composite aerogel can quickly detect a tiny strain, which could be further used for pulse beating, breathing, vibration, finger bending, and other human health monitoring. With the assistance of PI, the aerogel also presents high thermal insulation performance (0.022 W/(m·k)) and excellent low-temperature tolerance (−196 °C), showing wide application potential in many fields.