Dynamic covalent urea bonds and their potential for development of self-healing polymer materials
NAGIOS: RODERIC FUNCIONANDO

Dynamic covalent urea bonds and their potential for development of self-healing polymer materials

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Dynamic covalent urea bonds and their potential for development of self-healing polymer materials

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dc.contributor.author Wang, Zhanhua
dc.contributor.author Gangarapu, Satesh
dc.contributor.author Escorihuela Fuentes, Jorge
dc.contributor.author Fei, Guoxia
dc.contributor.author Zuilhof, Han
dc.contributor.author Xia, Hesheng
dc.date.accessioned 2019-09-20T13:33:43Z
dc.date.available 2019-09-20T13:33:43Z
dc.date.issued 2019
dc.identifier.uri https://hdl.handle.net/10550/71556
dc.description.abstract Self-healing polymer materials have drawn rapidly increasing interest over the last decade, and have been studied and used in an ever-increasing range of applications. Herein, we successfully make the covalent urea bond - a pinnacle of stability due to strong resonance effects - dynamic in nature through mediation of zinc salts. The dynamic covalent character of urea in the presence of zinc ions is confirmed through dissociation reaction experiments and quantum chemical calculations of small-molecule model urea compounds. In line with our experiments, the modelling results suggest that the presence of zinc ions speeds up the reaction of urea dissociation by two orders of magnitude via the formation of Obound Zn complexes. Based on such dynamic covalent urea bonds, we then develop a novel class of self-healing polymer materials with excellent healing efficiencies. Different kinds of self-healing and reprocessable polyurea materials were prepared, with polymer properties that can be easily tuned by varying the degree of crosslinking and the molecular weight of the siloxane precursor. Since different kinds of self-healing polyurea materials could easily be prepared due to the commercial availability of a very wide range of amine and isocyanate monomers, this introduction of self-healing properties is expected to have significant potential in a range of applications, such as coatings, paints, and 3D printing. In addition, this introduces polyureas and other urea-containing polymers as a class of highly stable, yet easily reprocessable plastics, which is highly relevant given the globally desired more sustainable use of plastics.
dc.language.iso eng
dc.relation.ispartof Journal Of Materials Chemistry a, 2019, vol. 7, num. 26, p. 15933-15943
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Wang, Zhanhua Gangarapu, Satesh Escorihuela Fuentes, Jorge Fei, Guoxia Zuilhof, Han Xia, Hesheng 2019 Dynamic covalent urea bonds and their potential for development of self-healing polymer materials Journal Of Materials Chemistry a 7 26 15933 15943
dc.subject Solucions polimèriques
dc.subject Ciència dels materials
dc.title Dynamic covalent urea bonds and their potential for development of self-healing polymer materials
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-09-20T13:33:43Z
dc.identifier.doi https://doi.org/10.1039/C9TA02054C
dc.identifier.idgrec 134243

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