Comparison of resistance improvement to fungal growth on paints by nano-metal impregnation

摘要

This study aims to compare the biological resistance of the water-based paint materials which contain different resin types (i.e., acrylic v.s. polyvinyl acetate) and resin weight percentages (i.e., 20% v.s. 30%) before and after nano-metal are mixed in the paint, as well as to explore best nano-metals to improve resistance of paints to fungal growth. Each selected paint was applied on a 5cm × 5cm stainless steel with an average film thickness of 100μm. The Aspergillus brasiliensis or Penicillium funiculosum was inoculated on each sample and their growth was visually evaluated according to ASTM G21-09. All test nano-metals failed to provide complete protection against fungal growth on the four test paints at the selected concentrations. However, the higher the nano-metal concentration was, the longer the lag period until growth began and fewer fungi grew on the materials.