A water-triggered highly self-healable elastomer with enhanced mechanical properties achieved using localized zwitterionic assemblies
- Authors
- 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
- Issue Date
- Sep-2021
- Publisher
- Elsevier B.V.
- Keywords
- Assemblies; Elastomer; Moisture; Self-healing; Zwitterion
- Citation
- Chemical Engineering Journal, v.420, no.Part 2, pp.1 - 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- Chemical Engineering Journal
- Volume
- 420
- Number
- Part 2
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141207
- DOI
- 10.1016/j.cej.2020.127636
- ISSN
- 1385-8947
- Abstract
- 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.
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