Wettability of Silane-Treated Glass Slides as Determined from X-Ray Photoelectron Spectroscopy

✍ Scribed by Y.Carolina Araujo; Pedro G. Toledo; Vladimir Leon; Hada Y. Gonzalez

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 104 KB
• Volume: 176
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1995.9942

✦ Synopsis

tability of core samples; for a review see Anderson (11). The wettability and stability of silane-treated substrates are cen-Here, however, one of the interests is in understanding the tral in many processes of industrial and environmental interest. mechanism by which a naturally water-wet surface like glass Here, we bring the capability of X-ray photoelectron spectroscopy becomes preferentially oil-wet.

(XPS) to bear on the wettability evaluation of treated glass. For

The XPS spectra of silane-treated glass indicate that silia suite of silane-treated slides we investigate the relationship becon species of the kind Si-CH exhibit a well-defined binding tween wettability and surface composition as determined from energy which differs from that of the Si-O species of the XPS. The adhesion behavior and contact angle of mineral oil on glass slides. The presence of the Si-CH species reveals glass brine-covered surfaces are used here as surface wettability indicasurfaces that have been rendered hydrophobic by chemisorptors. The XPS spectra of silanes and silane-treated glass slides indicate that silicon species of the kind Si-CH exhibit a well-tion of organic matter. The surface carbon content as deterdefined binding energy which differs from that of the Si-O species mined from XPS correlates strongly with surface wettability of the glass. The presence of the Si-CH species reveals glass surindicated by contact angle and adhesion behavior. faces that have been rendered hydrophobic by chemisorption of organic matter. The surface carbon content as determined from MATERIALS AND METHODS XPS correlates strongly with the equilibrium contact angle, contact angle hysteresis, adhesion behavior, and wettability state. This Glass Slides correlation can be used to rapidly determine the wettability of treated glass.