Issue 14, 2023

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Abstract

To meet more application requirements, improving mechanical properties and self-healing efficiency has become the focus of current research on self-healing PU. The competitive relationship between self-healing ability and mechanical properties cannot be avoided by a single self-healing method. To address this problem, a growing number of studies have combined dynamic covalent bonding with other self-healing methods to construct the PU structure. This review summarizes recent studies on PU materials that combine typical dynamic covalent bonds with other self-healing methods. It mainly includes four parts: hydrogen bonding, metal coordination bonding, nanofillers combined with dynamic covalent bonding and multiple dynamic covalent bond bonding. The advantages and disadvantages of different self-healing methods and their significant role in improving self-healing ability and mechanical properties in PU networks are analyzed. At the same time, the possible challenges and research directions of self-healing PU materials in the future are discussed.

Graphical abstract: Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Associated articles

Article information

Article type
Minireview
Submitted
19 Dec. 2022
Accepted
09 Febr. 2023
First published
09 Febr. 2023

Nanoscale, 2023,15, 6505-6520

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

Z. An, R. Xue, K. Ye, H. Zhao, Y. Liu, P. Li, Z. Chen, C. Huang and G. Hu, Nanoscale, 2023, 15, 6505 DOI: 10.1039/D2NR07110J

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