MXene-Based Conductive Organohydrogels with Long-Term Environmental Stability and Multifunctionality

文献类型： 外文期刊

第一作者： Wei, Yuan

作者： Wei, Yuan;Xiang, Lijing;Ou, Huajie;Li, Fang;Zhang, Yazeng;Qian, Yangyang;Zhang, Mengli;Zhu, Penghui;Liu, Yijun;Chen, Gang;Hao, Lijing;Diao, Jingjing;Liu, Yijun;Kuang, Yudi;Chen, Gang

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关键词： antifreezing; environmental stability; MXenes; organohydrogels; self-adhesion

期刊名称：ADVANCED FUNCTIONAL MATERIALS （ 影响因子：18.808； 五年影响因子：18.125 ）

ISSN： 1616-301X

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收录情况： SCI

摘要： Conductive hydrogels are promising interface materials utilized in bioelectronics for human-machine interactions. However, the low-temperature induced freezing problem and water evaporation-induced structural failures have significantly hindered their practical applications. To address these problems, herein, an elaborately designed nanocomposite organohydrogel is fabricated by introducing highly conductive MXene nanosheets into a tannic acid-decorated cellulose nanofibrils/polyacrylamide hybrid gel network infiltrated with glycerol (Gly)/water binary solvent. Owing to the introduction of Gly, the as-prepared organohydrogel demonstrates an outstanding flexibility and electrical conductivity under a wide temperature spectrum (from -36 to 60 degrees C), and exhibits long-term stability in an open environment (>7 days). Additionally, the dynamic catechol-borate ester bonds, along with the readily formed hydrogen bonds between the water and Gly molecules, further endow the organohydrogel with excellent stretchability (approximate to 1500% strain), high tissue adhesiveness, and self-healing properties. The favorable environmental stability and broad working strain range (approximate to 500% strain); together with high sensitivity (gauge factor of 8.21) make this organohydrogel a promising candidate for both large and subtle motion monitoring.

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