Al2O3-nanodiamond composite coatings with high durability and hydrophobicity prepared by aerosol deposition
- Authors
- Lee, Won-Hee; Kim, Hyung-Jun; Lee, Dong-Won; Jeong, Min-Goon; Lim, Dae-Soon; Nam, Song-Min
- Issue Date
- 25-6월-2012
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Aerosol deposition; Hydrophobicity; Durability; Nanodiamond; Al2O3
- Citation
- SURFACE & COATINGS TECHNOLOGY, v.206, no.22, pp.4679 - 4684
- Indexed
- SCIE
SCOPUS
- Journal Title
- SURFACE & COATINGS TECHNOLOGY
- Volume
- 206
- Number
- 22
- Start Page
- 4679
- End Page
- 4684
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108138
- DOI
- 10.1016/j.surfcoat.2012.05.052
- ISSN
- 0257-8972
- Abstract
- We attempted the room-temperature fabrication of Al2O3-based nanodiamond (ND) composite coating films on glass substrates by an aerosol deposition (AD) process to improve the anti-scratch and anti-smudge properties of the films. Submicron Al2O3 powder capable of fabricating transparent hard coating films was used as a base material for the starting powders, and ND treated by 1H,1H,2H,2H-perfluorooctyltriethoxysilane (PFOTES) was added to the Al2O3 to increase the hydrophobicity and anti-wear properties. The ND powder treated by PFOTES was mixed with the Al2O3 powder by ball milling to ratios of 0.01 wt.%, 0.03 wt.%, and 0.05 wt.% ND. The water contact angle (CA) of the Al2O3-ND composite coating films was increased as the ND ratio increased, and the maximum water CA among all the films was 110 degrees. In contrast to the water CA, the Al2O3-ND composite coating films showed low transmittance values of below 50% at a wavelength of 550 nm due to the strong agglomeration of ND. To prevent the agglomeration of ND, the starting powders were mixed by attrition milling. As a result. Al2O3-ND composite coating films were produced that showed high transmittance values of close to 80%, even though the starting powder included 1.0 wt.% ND. In addition, the Al2O3-ND composite coating films had a high water CA of 109 degrees and superior anti-wear properties compared to those of glass substrates. (c) 2012 Elsevier B.V. All rights reserved.
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