DEVELOPMENT OF CROSS-LINKED POLYVINYL ALCOHOL-TITANIUM DIOXIDE (PVA/TIO2) FILM FOR ANTIBACTERIAL COATING ON STEEL

  • Nurul Fatiha Mohd Padzli USM
  • Najihatul Fatihah Ahmad
  • Zuhailawati Hussain
  • Anasyida Abu Seman
  • Mohamad Danial Shafiq
  • Pung Swee Yong
Keywords: Anti-bacterial coating, steel coating, PVA, titanium dioxide, glutaraldehyde

Abstract

Development of cross-linked film coating on steel surface was made through the embedment of titanium dioxide (TiO2) nanoparticles in poly-vinyl alcohol (PVA) matrix.  The film was prepared by mixing TiO2 powder (3 wt%) into PVA solution. Glutaraldehyde (GA) was then added as the crosslinking agent in order to improve physical properties of the film. The resulting coating film was obtained after dried on steel plate in room temperature for 48 hours. PVA/TiO2 coatings were characterized using X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM) and contact angle goniometer. TiO2 anatase-structured presence on PVA was confirmed using Brucker Advanced X-ray Solution D8 Diffractometer (XRD). ZEISS SUPRA 55VP FESEM-EDX analysis conducted showed homogenous and uniform dispersion of TiO2 on the film after crosslinking. The cross-linked sample demonstrated higher contact angle at 71.74o indicating the reduction of coating hydrophilicity. In brief, the improved water stability of GA cross-linked PVA film with uniformly distributed TiO2 nanoparticles as the active material for anti-bacterial agent on the PVA matrix was successfully done. The cross-linked PVA/TiO2 coating may potentially be used for steel surfaces on public facilities such door-knobs, train handlebars, stairs handrail and lift buttons to reduce the transmission infection and improving the communal hygiene.

Published
2022-12-22
Section
Original Research Articles