柔性MXene/壳聚糖/氧化细菌纤维素气凝胶传感器的制备及性能研究

Preparation and Properties of Flexible MXene/Chitosan/Oxidized Bacterial Cellulose Aerogel Sensor

以氧化细菌纤维素、壳聚糖和MXene为基底材料,通过静电相互作用和京尼平化学交联制备高灵敏、稳定的导电气凝胶。利用SEM观察了气凝胶的微观结构,并通过FT-IR、XPS、XRD等手段表征了气凝胶的化学组成及晶型。最后评价了复合气凝胶的压敏性能和人体传感应用。结果表明气凝胶具有较低的质量,其密度仅为1.202 g/cm^(3);其能在500 ms内实现对外力/自身形变的响应;在一定外力范围内,其电阻值在8 000~2 000Ω区间内变化;气凝胶对人体运动进行响应的同时还能区别出不同的运动状态。

Highly sensitive and stable conductive aerogel was prepared by electrostatic interaction and chemical crosslinking of genipine by using oxidized bacterial cellulose,chitosan and MXene as substrate.The microstructure of the aerogel was observed by SEM,and the chemical composition and crystal shape of the aerogel were characterized by FT-IR,XPS and XRD.Finally,the pressure sensitive properties and human sensing applications of the composite aerogel were evaluated.The results show that the aerogel has a low mass,and its density is only 1.202 g/cm^(3).It can realize the response to external force/self-deformation within 500 ms.In a certain external force range,its resistance value changes in the 8000~2000Ωrange.The as-prepared aerogel is responsive to human movement and can distinguish between different motion states.