Foldable and Extremely Scratch-Resistant Hard Coating Materials from Molecular Necklace-like Cross-Linkers
- Authors
- Seo, Jiae; Moon, Sung Wook; Kang, Heemin; Choi, Byoung-Ho; Seo, Ji-Hun
- Issue Date
- 31-7월-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- hybrid; siloxane; polyrotaxane; cross-linker; antiscratch; coating material
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.11, no.30, pp.27306 - 27317
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 11
- Number
- 30
- Start Page
- 27306
- End Page
- 27317
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/64050
- DOI
- 10.1021/acsami.9b05738
- ISSN
- 1944-8244
- Abstract
- A flexible hard coating material displaying extreme scratch resistance and foldable flexibility was developed via the design of an organic-inorganic hybrid coating material employing an alkoxysilyl-functionalized polyrotaxane cross-linker (PRX_Sil). PRX_Si1 has a molecular necklace-like structure that can form organic inorganic cross-linking points and provide large molecular movements. It was postulated that the scratch resistance and flexibility could be simultaneously increased because of the hybrid cross-linking points and dynamic molecular movements. To confirm this hypothesis, the crystalline structure and mechanical properties of the PRX_Si1-based hard coating material were analyzed via transmission electron microscopy, small-angle X-ray diffraction, tensile, pencil hardness, and scratch tests. Finally, the PRX_Si1-based hard coating material could form homogeneously dispersed nanoscale siloxane crystalline domains, and the strain at the break point was 3 times higher than that of a commercial hard coating material, resulting in no defect formation even after 5000 folding test runs. Moreover, the material displayed extremely high pencil hardness (9H) and scratch resistance.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
- College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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