Aerogel sensors have drawn considerable interest in the recent research world. However, simultaneously maintaining superelasticity and an outstanding piezoresistive effect under changing environmental conditions remains challenging. Here, sodium alginate (SA) was used as a bonding agent for MXene nanosheets and polydimethylsiloxane (PDMS) as a reinforcing agent to prepare SA/MXene/PDMS (SMP) composite aerogel with excellent high conductivity, mechanical elasticity, reliable thermal insulation, and good hydrophobicity. The interaction between MXene nanosheets and SA enhances the 3D network framework of the aerogel. The aerogel with a layer-support network structure prepared by the modified directional freezing method showed light weight, high sensitivity (37.43 kPa⁻¹), significant reversible compression (70%) and excellent fatigue resistance (60,000 cycles). The piezoresistive sensor based on SMP composite aerogel can quickly respond to pressure/strain signals, which can be further used for pulse beating, sound detection, motion monitoring, foot posture diagnosis and human health monitoring. Additionally, the MXene aerogel sensor based on carbon material with frequency response characteristics can detect low to high frequency vibration signals, has frequency response characteristics that can detect low to high-frequency vibration signals, making it useful for rotating machinery speed detection, cantilever beam vibration detection, non-destructive testing of cantilever beams, and other engineering applications. With its the layered porous structure and the assistance of PDMS, the aerogel also exhibits larger water contact angles (119°) and extreme environmental suitability (−40 to 80 °C), performing a wide range of application potential in many fields.

气凝胶传感器引起了最近研究界的极大兴趣。然而，在不断变化的环境条件下同时保持超弹性和出色的压阻效应仍然具有挑战性。这里，使用海藻酸钠（SA）作为MXene纳米片的粘合剂和聚二甲基硅氧烷（PDMS）作为增强剂，制备了SA/MXene/PDMS（SMP）复合气凝胶，该气凝胶具有优异的高导电性、机械弹性、可靠的隔热性和良好的疏水性。MXene 纳米片和 SA 之间的相互作用增强了气凝胶的 3D 网络框架。改进的定向冷冻法制备的层状支撑网络结构气凝胶具有重量轻、灵敏度高（37.43 kPa ⁻¹）、显着的可逆压缩（70%）和出色的抗疲劳性（60,000 次循环）。基于SMP复合气凝胶的压阻传感器可以快速响应压力/应变信号，可进一步用于脉搏跳动、声音检测、运动监测、足部姿势诊断和人体健康监测。此外，基于具有频率响应特性的碳材料的MXene气凝胶传感器可以检测低频到高频的振动信号，具有可以检测低频到高频振动信号的频率响应特性，使其可用于旋转机械速度检测、悬臂梁振动检测、悬臂梁无损检测等工程应用。凭借其层状多孔结构和PDMS的辅助，