TiO2-PDMS Super Hydrophilic Coating with Self-Cleaning and Antimicrobial Properties

Abstract

In this paper, self-synthesized TiO2 nanoparticle was used as a coating material with the addition of polydimethylsiloxane (PDMS) on the surface of the glass and ceramic substrate via spray coating. The self-cleaning properties of the coating with photocatalytic activity mechanism were observed under irradiation of black lamp as well as surface wettability. The antimicrobial properties and the morphology under a scanning electron microscope were also investigated. The results showed that the coating exhibited self-cleaning properties, as demonstrated by the photocatalytic degradation of methylene blue up to 80% and wettability as a super hydrophilic layer with a water contact angle less than 10° for both glass and ceramic substrate. The coating also shows an antimicrobial property by extending the radius of microbial growth up to 67% compared to the uncoated sample. 3% TiO2 addition with 50% w/w PDMS is the optimum coating ratio for maximum photocatalytic activity, super hydrophilic, and antimicrobial properties.

Synthesis and Elaboration of Polydimethylsiloxane/Titanium Dioxide Nanocomposite Films

“…Polydimethylsiloxane/Titanium dioxide (PDMS/TiO2) nanocomposites are a type of thin films. The combination of both materials, PDMS and TiO2 nanoparticles, creates a synergistic effect, resulting in a material with enhanced properties such as improved transparency, mechanical strength, and antibacterial activity [6][7][12][13][14][15]. The films can be prepared through various methods, including solgel, electrospinning, and spin coating [16][17][18].…”