MXene-Based Conductive Organohydrogels with Long-Term Environmental Stability and Multifunctionality
文献类型： 外文期刊
作者： Wei, Yuan 1 ; Xiang, Lijing 1 ; Ou, Huajie 1 ; Li, Fang 1 ; Zhang, Yazeng 1 ; Qian, Yangyang 1 ; Hao, Lijing 2 ; Diao, Ji 1 ;
作者机构： 1.South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China
2.South China Univ Technol, Natl Engn Res Ctr Tissue Restorat & Reconstruct, Innovat Ctr Tissue Restorat & Reconstruct Med Dev, Res & Testing Ctr SCUT,Sch Biomed Sci & Engn, Guangzhou 510006, Peoples R China
3.Chinese Acad Trop Agr Sci, Key Lab Trop Crop Prod Proc, Minist Agr & Rural Affairs, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China
4.South China Univ Technol, Sch Biomed Sci & Engn, Natl Engn Res Ctr Tissue Restorat & Reconstruct, Innovat Ctr Tissue Restorat & Reconstruct, Guangzhou 510006, Peoples R China
5.South China Univ Technol, Guangdong Engn Technol Res & Dev Ctr Specialty Pa, Guangzhou 510640, Peoples R China
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
年卷期：
页码：
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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