Underwater flexible mechanoreceptors constructed by anti-swelling self-healable hydrogel  

抗溶胀自愈合水凝胶构筑水下柔性机械感受器

作　　者：Xin Liu Qin Zhang Fei Jia Guanghui Gao 刘鑫;张钦;贾菲;高光辉(Polymeric and Soft Materials Laboratory,School of Chemical Engineering and Advanced Institute of Materials Science,Changchun University of Technology,Changchun 130000,China;Beijing Graphene Institute(BGI),Beijing 100095,China)

机构地区：[1]Polymeric and Soft Materials Laboratory,School of Chemical Engineering and Advanced Institute of Materials Science,Changchun University of Technology,Changchun 130000,China [2]Beijing Graphene Institute(BGI),Beijing 100095,China

出　　处：《Science China Materials》2021年第12期3069-3078,共10页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (51873024);the grant from Science and Technology Department of Jilin Province (20200708102YY)。

摘　　要：Wet-resistant flexible electronics have acquired increasing attention on applications in wet environments,such as sweaty skin, rainy weather, biological fluids, and underwater. However, it remains challenging to achieve nonswelling and underwater self-healing hydrogel sensors for the mechanical perception in aqueous solutions. Herein, a selfhealing and non-swellable hydrogel is successfully fabricated,which presents an automatically healing behavior in various aquatic environments, including deionized water, seawater,sweat, alkali and acidic aqueous solutions. Moreover, the hydrogel demonstrates high stretchability and stable electromechanical sensing properties in water. Furthermore, an electronic skin is designed with the features of fast responsiveness, reliability, and high sensitivity for detecting breathing, speaking, coughing, and diverse body movements. The self-healing hydrogel sensors enable a brilliant mechanical sensibility for detecting a series of dynamic stimuli in air and underwater, even after the healing of fracture interface in water. The underwater self-healing and anti-swelling hydrogel would provide enticing potential on various stable electronic devices for aquatic environments, such as implantable electrodes, triboelectric nanogenerators, and underwater soft robotics.近年来,具有抗湿功能的柔性电子器件在湿润环境如汗湿的皮肤、雨水天气以及生物体液环境等方面的应用获得了越来越多的关注.然而,设计出一种具有非溶胀且水下自愈合性的水凝胶材料用以实现其在水溶液环境下稳定的机械感知至今仍是个巨大的挑战.本文中,我们成功构建了一种抗溶胀自愈合水凝胶,其在各种水溶液环境(包括水、海水、汗水、酸碱水溶液等)中展示出优异的自愈合行为.此外,该水凝胶展现出高的拉伸性以及水下机械传感性能.由该水凝胶进一步装备而成的可水下自愈合的电子皮肤具有响应速度快、可靠性好、灵敏度高等特点,并成功用于准确监测人体呼吸、说话、肢体运动等.该水凝胶传感器在水中先断裂再愈合之后,仍然保持着优异的水下机械传感性能.这种水下自愈合且抗溶胀的水凝胶为制备水生环境下的各种稳定电子器件如水下机器人、可植入电子器件,以及实现水下通讯等提供了可能.

关 键 词：HYDROGEL water-insensitive electronics underwater self-healing anti-swelling underwater sensing 

分 类 号：TN03[电子电信—物理电子学] TQ427.26[化学工程]