State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Separation Membranes, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China.
State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Separation Membranes, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China.
Carbohydr Polym. 2022 Sep 1;291:119572. doi: 10.1016/j.carbpol.2022.119572. Epub 2022 May 6.
Integrating functionalities such as adhesiveness, self-healing, and conductivity on a polysaccharide-based hydrogel is highly desirable for ever-expanding practical applications, but there is always a challenge. Herein, an elaborately designed nanocomposite hydrogel is fabricated by the addition of highly conductive TiCT MXene nanosheets into chondroitin sulfate (CS)/N, N-dimethylamino ethyl acrylate (DMAEA-Q) hydrogel network. Owing to the introduction of sulfonated TiCT MXene nanosheets, the as-prepared nanocomposite hydrogels exhibit excellent stretchability (> 5000% strain), rapid self-healing ability (< 60 s), and high adhesiveness (≈ 100 kPa). The proposed hydrogel demonstrates an outstanding electrical conductivity up to 5.33 S/m, allowing real-time monitoring of the bending and stretching movements and full recovery. Furthermore, the SMC hydrogels exhibit fast and stable photothermal conversion performance due to the inherent photothermal behavior. Notably, multifunctional SMC hydrogels present real-time and reversible humidity sensing upon HO-induced swelling/contraction of nanochannels between the TiCT MXene interlayers, enabling respiration monitoring applications.
在多糖基水凝胶上集成粘附性、自修复和导电性等功能对于不断扩展的实际应用是非常理想的，但这始终是一个挑战。在此，通过将高导电性 TiCT MXene 纳米片添加到硫酸软骨素 (CS)/N，N-二甲基氨基乙基丙烯酰胺 (DMAEA-Q) 水凝胶网络中，制备了一种精心设计的纳米复合水凝胶。由于引入了磺化 TiCT MXene 纳米片，所制备的纳米复合水凝胶表现出优异的拉伸性（>5000%应变）、快速自修复能力（<60 s）和高粘附性（≈100 kPa）。所提出的水凝胶表现出高达 5.33 S/m 的出色电导率，允许实时监测弯曲和拉伸运动以及完全恢复。此外，由于固有光热行为，SMC 水凝胶表现出快速和稳定的光热转换性能。值得注意的是，多功能 SMC 水凝胶在 HO 诱导的 TiCT MXene 层间纳米通道的膨胀/收缩下表现出实时和可逆的湿度传感，从而实现呼吸监测应用。
