Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-09826-2
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Funding
- Japan Society for the Promotion of Science [16K17958, 16K05748]
- Mazda Foundation [17kk-079]
- Ogasawara Foundation for the Promotion of Science Engineering
- Koshiyama Foundation
- [2016G627]
- [2017G562]
- Grants-in-Aid for Scientific Research [16K17958, 16K05748] Funding Source: KAKEN
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Self-healing materials are highly desirable because they allow products to maintain their performance. Typical stimuli used for self-healing are heat and light, despite being unsuitable for materials used in certain products as heat can damage other components, and light cannot reach materials located within a product or device. To address these issues, here we show a gas-plastic elastomer with an ionically crosslinked silicone network that quickly self-heals damage in the presence of CO2 gas at normal pressures and room temperature. While a strong elastomer generally exhibits slow self-healing properties, CO2 effectively softened ionic crosslinks in the proposed elastomer, and network rearrangement was promoted. Consequently, self-healing was dramatically accelerated by similar to 10-fold. Moreover, self-healing was achieved even at -20 degrees C in the presence of CO2 and the original mechanical strength was quickly re-established during the exchange of CO2 with air.
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