Abstract
Films were prepared on stainless steel, aluminum alloy and glass substrates using silica precursor solution containing copper ions. The thickness of the film coating was about 0.1-0.2μm. The corrosion resistance was greatly improved by PVB-containing silica coating onto stainless steel. An antimicrobial test based on Japanese Industrial Standard (JIS Z 2801) indicates that the antimicrobial activity (R) of a control silica coating is R=0.0, whereas R=5.0 for the copper-containing silica coating (Cu: 6.1×10-3mol/L). JIS defines antimicrobial activity as positive when R is more than 2.0. A submicron thick copper-containing silica coating clearly impacts corrosion resistance and antimicrobial activity to a material surface without any heat treatment.
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