Wetting properties and stability of silane-treated glass exposed to water, air, and oil
- New Mexico Inst. of Mining and Technology, Socorro (United States)
Wettability and stability of glass surfaces modified with five organosilanes were characterized by monitoring temporal changes in water-air contact angles on treated glass slides stored in air, water, and oil. Silane treatment altered the wetting properties of sodalime glass slides, with all contact angles exhibiting hysteresis. The induced hydrophobicity remained stable for slides stored in air and oil, but deteriorated for slides stored in water, as indicated by a decrease in advancing and/or receding contact angles. The critical surface tension, above which a liquid displays a finite contact angle on a surface, was not sensitive to aging. Quartz and silica substrates gave essentially the same results as sodalime glass. Bacterial action was ruled out as a primary cause of deterioration of hydrophobicity. A coating of refined oil (Soltrol 130) on the treated surface prolonged stability in water but eventual breakdown was still evident from decrease in the receding contact angles. Hydrolysis was the likely cause of deterioration. Water-Soltrol 130 advancing and receding contact angles were higher than water-air contact angles, but there was a systematic relationship between them. Recommendations are made as to the most suitable silanes for treating glass, quartz, or silica surfaces for investigations which last more than a few hours.
- OSTI ID:
- 6485105
- Journal Information:
- Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 157:1; ISSN 0021-9797; ISSN JCISA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360606* -- Other Materials-- Physical Properties-- (1992-)
AIR
AQUIFERS
CHALCOGENIDES
CLEANING
CORROSION RESISTANCE
DECONTAMINATION
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FUELS
GASES
GLASS
HYDRIDES
HYDROGEN COMPOUNDS
MINERALS
OILS
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
QUARTZ
SILANES
SILICON COMPOUNDS
SILICON OXIDES
STABILITY
SURFACE PROPERTIES
SURFACE TENSION
WATER
WETTABILITY