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Effect of Adsorbed Water on the Spreading of Organic Liquids on Soda‐Lime Glass
Author(s) -
SHAFRIN ELAINE G.,
ZISMAN W. A.
Publication year - 1967
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1967.tb15166.x
Subject(s) - wetting , adsorption , contact angle , surface tension , moisture , soda lime glass , adhesion , materials science , surface energy , chemical engineering , layer (electronics) , soda lime , adhesive , glass transition , porous glass , composite material , mineralogy , chemistry , polymer , organic chemistry , thermodynamics , physics , porosity , engineering
The spreading behavior and equilibrium contact angle, θ, of organic liquids on soda‐lime glass surfaces were observed at relative humidities (rh) varying from 1 to 95%. Increasing rh increased θ for many nonhydrophilic liquids on glass; no comparable effects occurred with nonadsorptive solid surfaces. The decrease in wettability of the glass with increasing rh resulted from the physical adsorption of a surface layer of water molecules sufficient to convert the normally high‐energy glass surface into one that behaves as a low‐energy surface, i.e. a surface with a low critical surface tension for spreading, γ c , toward nonhydrophilic liquids. As the thickness of the adsorbed water layer increased, glass behaved like a surface with progressively decreasing γ c , approaching that of bulk water. These results are discussed in relation to the effect of moisture on the spreading or adhesion of resins to glass and other hydrophilic solids.