Lightweight aerogels with elastic performance and tunable surface properties have made them a good alternative for smart electornic skin. However, the aerogels remain a great barrier for sensing applications because of their severe brittleness and difficult regulation of surface property. Herein, we report a superelastic aerogel originated from a rational designed waterborne poly(siloxane-benzoxazine) by using the ice template method. The three-dimensional (3D) network is constructed via the radical crosslinking and ring-opening polymerization followed by the freeze-drying process. Moreover, it also shows pronounced mechanical performance that can be compressed over 70% and recover without fracture. Beyond that, its surface property could be altered from highly hydrophilic to hydrophobic property (145° water contact angle) by adjusting the crosslinking degree of the aerogel under different curing temperatures. We further demonstrate a pressure sensor by in situ polymerization of the aniline (PANI) on the surface of the aerogel. The multifunctional properties make it an attractive material for self-cleaning electronic skin.

中文翻译：

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具有可调润湿性的弹性气凝胶，用于自清洁电子皮肤

具有弹性性能和可调节表面性能的轻质气凝胶使其成为智能电子皮肤的理想替代品。然而，气凝胶由于其严重的脆性和难以调节的表面性质而仍然是传感应用的巨大障碍。在这里，我们报告了一种超弹性气凝胶，它是通过使用冰模板方法从合理设计的水性聚（硅氧烷-苯并恶嗪）衍生而来的。三维（3D）网络是通过自由基交联和开环聚合，然后进行冷冻干燥过程而构建的。此外，它还显示出显着的机械性能，可以压缩超过70％，并且可以恢复而不会破裂。除此之外，通过调节不同固化温度下气凝胶的交联度，可以将其表面性质从高度亲水性改变为疏水性（145°水接触角）。我们进一步通过在气凝胶表面上进行苯胺（PANI）的原位聚合来演示压力传感器。多功能特性使其成为自清洁电子皮肤的诱人材料。