A hybrid polyvinyl alcohol/molybdenum disulfide nanosheet hydrogel with light-triggered rapid self-healing capability. Issue 9 (19th February 2021)

• Record Type: Journal Article
• Authors: Yang, Wen Jing; Wang, Xiaodong; Zhang, Rui; Wang, Yuxin; Qiu, Qiu; Yuwen, Lihui; Wang, Lianhui
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 9(2021)
• Page Start: 2266
• Page End: 2274
• Publication Date: 2021-02-19
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Biomedical materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tb02830d
• Languages: English
• ISSNs: 2050-750X

Abstract

Abstract : By employing the excellent photothermal conversion properties of molybdenum disulfide (MoS2 ) nanosheets, a hybrid hydrogel was prepared with light-triggered rapid self-healing capability. Abstract : 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.