Effect of Ambient Humidity to Wetting Angles of Various Hydrophilic Surfaces

摘要

The effect of ambient humidity to water and dimethyl sulfoxide wetting angles of paraffin and polyethylene terephthalate surfaces was studied. Symbasis of this relationship was found for hydrophilic polyethylene terephthalate film surface, evidencing apparently lower polarity of polyethylene terephthalate surface at higher ambient humidity. An opposite relationship of wetting angles vs. ambient humidity was observed for paraffin/water system. No relationship of wetting angles vs. ambient humidity was detected for paraffin/dimethyl sulfoxide system.