Al 2O 3-nanodiamond composite coatings with high durability and hydrophobicity prepared by aerosol deposition

Won Hee Lee, Hyung Jun Kim, Dong Won Lee, Min Goon Jeong, Dae Soon Lim, Song Min Nam

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We attempted the room-temperature fabrication of Al 2O 3-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 Al 2O 3 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 Al 2O 3 to increase the hydrophobicity and anti-wear properties. The ND powder treated by PFOTES was mixed with the Al 2O 3 powder by ball milling to ratios of 0.01wt.%, 0.03wt.%, and 0.05wt.% ND. The water contact angle (CA) of the Al 2O 3-ND composite coating films was increased as the ND ratio increased, and the maximum water CA among all the films was 110°. In contrast to the water CA, the Al 2O 3-ND composite coating films showed low transmittance values of below 50% at a wavelength of 550nm due to the strong agglomeration of ND. To prevent the agglomeration of ND, the starting powders were mixed by attrition milling. As a result, Al 2O 3-ND composite coating films were produced that showed high transmittance values of close to 80%, even though the starting powder included 1.0wt.% ND. In addition, the Al 2O 3-ND composite coating films had a high water CA of 109° and superior anti-wear properties compared to those of glass substrates.

Original languageEnglish
Pages (from-to)4679-4684
Number of pages6
JournalSurface and Coatings Technology
Volume206
Issue number22
DOIs
Publication statusPublished - 2012 Jun 25

Keywords

  • Aerosol deposition
  • Al O
  • Durability
  • Hydrophobicity
  • Nanodiamond

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Al <sub>2</sub>O <sub>3</sub>-nanodiamond composite coatings with high durability and hydrophobicity prepared by aerosol deposition'. Together they form a unique fingerprint.

Cite this