A water-triggered highly self-healable elastomer with enhanced mechanical properties achieved using localized zwitterionic assemblies

[Display omitted] •A novel water-triggered self-healable elastomer with localized zwitterions was prepared.•The zwitterionic elastomer shows superior self-healing ability especially under wet conditions.•The zwitterionic elastomer eliminates the trade-off of conventional self-healing materials. In t...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2021-09, Vol.420, p.127636, Article 127636
Hauptverfasser: Kang, Jungsoon, Kim, Jinsil, Choi, Kiwon, Hong, Pyong Hwa, Park, Hee Jeong, Kim, Kiseung, Kim, Young Kyung, Moon, Gyeongmin, Jeon, Hyeryeon, Lee, Seoyun, Ko, Min Jae, Hong, Sung Woo
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Sprache:eng
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Zusammenfassung:[Display omitted] •A novel water-triggered self-healable elastomer with localized zwitterions was prepared.•The zwitterionic elastomer shows superior self-healing ability especially under wet conditions.•The zwitterionic elastomer eliminates the trade-off of conventional self-healing materials. In this study, the synthesis of a water-triggered highly self-healable elastomer with excellent optical and mechanical properties through localized zwitterionic assemblies is demonstrated for the first time using a newly proposed blending method. The self-healable elastomer obtained by blending conventional polyol and zwitterionic polyol shows a high transmittance (~92%) and low yellow index value (1.9). The fabricated material with localized zwitterionic clusters shows superior self-healing efficiency (94–100%) under both dry and wet conditions compared with conventional nonionic elastomers (~69%) and ionic elastomers with randomly distributed ions (80–87%). This is attributed to the significantly higher probability of contact between the localized zwitterionic assemblies of this material in the damaged area. More importantly, conventional self-healing materials have obtained the self-healing properties of polymers at the expense of their mechanical properties. An elastomer with localized zwitterions eliminates this trade-off between self-healing and mechanical properties. These properties are attributed to the unique intermolecular network resulting from strong interactions between localized zwitterionic clusters. As a result, the zwitterionic self-healable elastomer, based on the blending system proposed in this study, can maximize its self-healing capabilities and overcome the limitations of conventional self-healing materials via the concentration of zwitterions into a local domain.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2020.127636