Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 13, Pages 5278-5283Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201913893
Keywords
dynamic covalent chemistry; elastomers; ionic clusters; self-healing materials; supramolecular polymers
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Funding
- National Natural Science Foundation of China [21790361, 21871084, 21672060]
- Shanghai Municipal Science and Technology Major Project [2018SHZDZX03]
- Program of Shanghai Academic/Technology Research Leader [19XD1421100]
- Fundamental Research Funds for the Central Universities
- Programme of Introducing Talents of Discipline to Universities [B16017]
- Shanghai Science and Technology Committee [17520750100]
- Netherlands Ministry of Education, Culture and Science [024.601035]
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Supramolecular polymers that can heal themselves automatically usually exhibit weakness in mechanical toughness and stretchability. Here we exploit a toughening strategy for a dynamic dry supramolecular network by introducing ionic cluster-enhanced iron-carboxylate complexes. The resulting dry supramolecular network simultaneous exhibits tough mechanical strength, high stretchability, self-healing ability, and processability at room temperature. The excellent performance of these distinct supramolecular polymers is attributed to the hierarchical existence of four types of dynamic combinations in the high-density dry network, including dynamic covalent disulfide bonds, noncovalent H-bonds, iron-carboxylate complexes and ionic clustering interactions. The extremely facile preparation method of this self-healing polymer offers prospects for high-performance low-cost material among others for coatings and wearable devices.
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