一种抗冻、可拉伸有机水凝胶的制备及 在柔性应变传感器中的应用

针对导电水凝胶柔性应变传感器在低温环境容易被冻结而发生失效的问题，通过溶剂置换策略制备了一种抗冻、可拉伸的聚多巴胺还原氧化石墨烯/海藻酸钠/聚丙烯酰胺（PDA-rGO/SA/PAM）有机水凝胶。实验结果表明：制得的有机水凝胶具有优异的抗冻性能、良好的机械性能以及灵敏的传感性能。此外，组装的有机水凝胶柔性应变传感器可以检测多种人体运动形式，例如手指弯曲、手腕弯曲、面部微表情等，对未来可穿戴柔性电子产品的发展起到了一定的推动作用。

Fabrication of a Freezing-Tolerant and Stretchable Composite Organohydrogel for Flexible Strain Sensors

Focusing on the problem that most conductive hydrogels based flexible sensors easily get failed in the low-temperature environment, an anti-freezing and stretchable polydopamine-reduced graphene oxide/sodium alginate/polyacrylamide (PDA-rGO/SA/PAM) composite organohydrogel was developed via solvent replacement strategy. The experimental results show that the composite organohydrogel have outstanding anti-freezing property, good mechanical property, and excellent sensing property. In addition, the assembled organohydrogel flexible strain sensor can detect multiple human motions, such as finger bending, wrist bending, facial micro-expression, etc., and has played its role in promoting the development of wearable flexible electronics in the future.