Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods
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 ad...
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| Published in: | Nanoscale 2023-04, Vol.15 (14), p.655-652 |
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| Main Authors: | , , , , , , , , |
| Format: | Article |
| Language: | eng |
| Subjects: | |
| Online Access: | Request full text |
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| Summary: | 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.
This review summarizes recent advances in self-healing PU by the "dynamic covalent bonding + X" method, where X represents dynamic covalent bonds, hydrogen bonding, metal coordination bonding, nanofillers and others. |
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| ISSN: | 2040-3364 2040-3372 |