Development of hydrophilic self-cleaning surfaces using cu-doped titanium dioxide/pva/ga on ceramic wall tiles

Loading...
Thumbnail Image
Date
2019-06
Authors
Chew Wei Chun
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Superhydrophilic properties allow surfaces to be cleaned easily through complete wetting of water when in contact with the surfaces of wall tiles. The main focus in this research is to develop a hydrophilic coating on ceramic glazed wall tiles for self-cleaning purpose. The newly developed hydrophilic coating incorporated of TiO2 due to its hydrophilic nature. Copper doped Titania (Cu-doped TiO2) nanotubes was synthesized using hydrothermal method, which the aim is to reduce the band gap of TiO2 by doping of Cu2+ ion. The synthesis of Cu-doped TiO2 nanotubes managed to reduce the band gap of TiO2 from 3.2 eV to 2.09 eV and increases the photocatalytic performance of TiO2. Meanwhile, PVA/GA was used as the solvent to dissolve Cu-doped TiO2 and hold Cudoped TiO2 on the surface of wall tiles. In order to reduce the water solubility of PVA, GA was used as crosslinking agent to form bonds between PVA. The tiles was dip coated and the optimum coating layer determined was 5 layers based on the appearance and WCA results. The best water contact angle obtained was 37.45°. The results obtained showed that the newly developed coating was in hydrophilic region (< 90º), which are slightly higher than superhydrophilic region (< 10º).
Description
Keywords
Citation