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. 2020 Oct 1;12(10):2261. doi: 10.3390/polym12102261

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Photographs of self-healing process. (a–c) Healing process after 12 h and with different amount of pieces. (d) Optical microscopy images, (e) Rapid ionic self-healing process. (f) Self healing process of freeze-dried scaffold, (h) Tubular hollow structure of hydrogels. Reprinted with permission from B. Ye et al. [115]. An in situ formable and fibrils-reinforced polysaccharide composite hydrogel by self-crosslinking with dual healing ability. Copyright © 2020, Elsevier Ltd. All rights reserved.