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http://hdl.handle.net/10397/94303
Title: | Self-healable and super-tough double-network hydrogel fibers from dynamic acylhydrazone bonding and supramolecular interactions | Authors: | Hua, J Liu, C Fei, B Liu, Z |
Issue Date: | Feb-2022 | Source: | Gels, Feb. 2022, v. 8, no. 2, 101 | Abstract: | Macroscopic hydrogel fibers are highly desirable for smart textiles, but the fabrication of self-healable and super-tough covalent/physical double-network hydrogels is rarely reported. Herein, copolymers containing ketone groups were synthesized and prepared into a dynamic covalent hydrogel via acylhydrazone chemistry. Double-network hydrogels were constructed via the dynamic covalent crosslinking of copolymers and the supramolecular interactions of iota-carrageenan. Tensile tests on double-network and parental hydrogels revealed the successful construction of strong and tough hydrogels. The double-network hydrogel precursor was wet spun to obtain macroscopic fibers with controlled drawing ratios. The resultant fibers reached a high strength of 1.35 MPa or a large toughness of 1.22 MJ/m3 . Highly efficient self-healing performances were observed in hydrogel fibers and their bulk specimens. Through the simultaneous healing of covalent and supramolecular networks under acidic and heated conditions, fibers achieved rapid and near-complete healing with 96% efficiency. Such self-healable and super-tough hydrogel fibers were applied as shape memory fibers for repetitive actuating in response to water, indicating their potential in intelligent fabrics. | Keywords: | Double network Dynamic covalent bond Hydrogel fiber Iota carrageenan Self-healing |
Publisher: | MDPI AG | Journal: | Gels | EISSN: | 2310-2861 | DOI: | 10.3390/gels8020101 | Rights: | © 2022 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 (https://creativecommons.org/licenses/by/4.0/). The following publication Hua, J., Liu, C., Fei, B., & Liu, Z. (2022). Self-Healable and Super-Tough Double-Network Hydrogel Fibers from Dynamic Acylhydrazone Bonding and Supramolecular Interactions. Gels, 8(2), 101 is available at https://doi.org/10.3390/gels8020101 |
Appears in Collections: | Journal/Magazine Article |
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gels-08-00101-v2.pdf | 2.31 MB | Adobe PDF | View/Open |
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