聚氨酯材料由于力学性能的限制以及负载其他功能材料时易出现团聚和附着性低的问题,影响了传感器的灵敏度和检测范围。为解决以上问题,在发泡过程加入MXene,通过两者之间在发泡过程产生相互作用获得具有优越力学性能和热稳定性的柔性PUF基材料。将制备的材料应用于柔性压阻式传感器,可有效改善导电材料MXene易脱落的问题。传感器获得了在0%~83.39%的宽压缩应变范围内检测外部压力以及非常快速的响应时间(8.06 ms),循环1 000次后的电信号依然非常稳定且可重复性高,具有极高的灵敏度。

The sensitivity and detection range of the polyurethane-based sensor are negatively affected because polyurethane materials own undesirable mechanical properties,and are easy to suffer aggregation and low adhesion when loading other functional materials.In order to address these issues,MXene is added into the polyurethane foaming process to obtain flexible polyurethane-based materials with superior mechanical properties and thermal stability through the interaction between the two during the foaming process.The prepared material is applied to flexible piezoresistive sensor,which can effectively solve the problem that MXene,the conductive material,is prone to detachment.The sensor presents a fast response time of 8.06 ms,a broadened detection range of 0%-83.39%,and extremely high sensitivity.After 1 000 cycles,the electrical signal of the sensor remains very stable and has high repeatability.

彭炯(1972-),男,博士,副教授,主要从事功能材料研究,jiongpeng@bit.edu.cn。