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(Chemistry of Materials) Soft yet Tough: Mechanically and Functionally Tissue-Like Organohydrogel for Sensitive Soft Electronics
作者:Gehong Su, Yulin Zhang, Xueqian Zhang, Jin Feng, Jie Cao, Xinxing Zhang, Tao Zhou*
關鍵字:hydrogel, organohydrogel, tissue-like materials, soft yet tough, soft electronics
論文來源:期刊
具體來源:Chemistry of Materials, 2022, 34, 1392-1402
發表時間:2022年

Human soft tissues like skins and muscles possess uniquely soft yet tough and tear-resistant mechanical features and sophisticated functionality, which is still challenging to mimic in artificial materials. Herein, we report a mechanically and functionally tissue-like organohydrogel by constructing abundant sacrificial bonds (hydrogen bonds) between a soft hydrogel matrix and glycerol (Gly) via a facile solvent displacement strategy. By regulating the Gly content, the optimized organohydrogel exhibited remarkable mechanical properties that fully match human soft tissues, including the distinct soft (~128 kPa in Young’s modulus) yet tough (~15.66 MJ m?3 in toughness), and tear-resistant (~13.99 kJ m?2 in fracture energy) features. Meanwhile, the gel is strong (~1.35 MPa in tensile and ~23.1 MPa in compression) and ultrastretchable (~2150%). Furthermore, the organohydrogel possesses a wide spectrum of tissue-like functionalities, including freezing/heating tolerance, self-healing, electroconductivity, and multiple sensations (tensile, pressure, temperature, and solar flux). By taking these advantages, proof-of-concept applications in personal healthcare monitoring, anti-counterfeiting, and soft electronic skins were demonstrated using the PAAN/Gly organohydrogel. We anticipated that this work would open an avenue toward developing soft materials with sophisticated mechanical properties and functionalities resembling human tissues.

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