Abstract
Abstract Wettabilities of purified paraffin, crude paraffin, palmitic acid and cetyl alcohol are measured towards aqueous solutions of potassium, calcium, aluminum and thorium salts. It is pointed out that palmitic acid surface becomes remarkably wettable by the contact with aqueous solution of thorium or aluminum salt even in the extreme dilution. Such an increase in wettability can neither be explained simply by ζ-potential change of the palmitic acid surface in those solutions nor overturning of the molecule in surface layer. Alternative explanations are suggested.
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