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Self-healable and tough nanocomposite hydrogel crosslinked by novel ultrasmall aluminum hydroxide nanoparticles

Abstract

Self-healing hydrogels like tissues or organs which are repaired automatically in response to damage show great promise. However, it remains a challenge to develop novel functional nanoparticles as crosslinkers to prepare tough and self-healing nanocomposite hydrogels. Here, we report the preparation of water-soluble ultrasmall aluminum hydroxide nanoparticles with diameter of 2-3 nm through a simple sol-gel method. Further, a tough nanocomposite hydrogel is prepared by in-situ copolymerization of acylamide and 2-acrylamido-2-methyl Propane sulfonic acid in the presence of aluminum hydroxide nanoparticles. The resulting hydrogels exhibit high compressive strength of 18.9 MPa and elongation at break of ~2100%. Importantly, the Al-NC gel displayed high self-healing efficiency of 86% without any external stimulus at room temperature. Moreover, we found an interesting multi-hierarchical porous morphology of the Al-NC gel depending on the aluminum hydroxide nanoparticles contents. The tough nanocomposite hydrogel might provide a novel promising avenue for designing advanced self-healable soft materials for various biomedical applications.

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Publication details

The article was received on 30 Jun 2017, accepted on 12 Sep 2017 and first published on 13 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR04722C
Citation: Nanoscale, 2017, Accepted Manuscript
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    Self-healable and tough nanocomposite hydrogel crosslinked by novel ultrasmall aluminum hydroxide nanoparticles

    H. Jiang, G. Zhang, F. Li, Y. Zhang, Y. Lei, Y. Xia, X. Jin, X. Feng and H. Li, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04722C

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