Yang Wen Jing, Wang Xiaodong, Zhang Rui, Wang Yuxin, Qiu Qiu, Yuwen Lihui, Wang Lianhui
Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
J Mater Chem B. 2021 Mar 11;9(9):2266-2274. doi: 10.1039/d0tb02830d.
A hybrid self-healing hydrogel (PM hydrogel), based on polyvinyl alcohol (PVA) and chemically exfoliated molybdenum disulfide (ce-MoS2) nanosheets, was prepared by a simple freeze-thaw method. Due to the excellent photothermal conversion properties of ce-MoS2 nanosheets, the PM hydrogel self-repaired rapidly under near infrared (NIR) light irradiation for only 3 min with a high healing efficiency of 91.8 ± 3.3%. The PVA content, ce-MoS2 nanosheet loading and light irradiation time played important roles in the self-healing performance. Additionally, the PM hydrogel also revealed good self-healing properties with a healing efficiency of 60.6 ± 3.6% after the cut surfaces were separated for 24 h. The present approach provides an effective strategy for fabricating fast light-triggered hydrogen-bond based self-healing systems. The as-prepared hybrid PM hydrogel has great potential as a soft biomaterial for long-term applications due to its biocompatibility and self-healing capability.
基于聚乙烯醇（PVA）和化学剥离的二硫化钼（ce-MoS2）纳米片，通过简单的冻融法制备了一种混合自修复水凝胶（PM水凝胶）。由于ce-MoS2纳米片具有优异的光热转换性能，PM水凝胶在近红外（NIR）光照射下仅3分钟即可快速自修复，愈合效率高达91.8±3.3%。PVA含量、ce-MoS2纳米片负载量和光照射时间对自修复性能起着重要作用。此外，在切割面分离24小时后，PM水凝胶仍显示出良好的自修复性能，愈合效率为60.6±3.6%。本方法为制备快速光触发的基于氢键的自修复系统提供了一种有效策略。所制备的混合PM水凝胶由于其生物相容性和自修复能力，作为一种软生物材料具有长期应用的巨大潜力。
