Interaction of Ethanol Vapour with Silane-Modified Surface of Corning Porous Glass CPG-10. (31st October 2012)

• Record Type: Journal Article
• Authors: Nadiye-Tabbiruka, Misael Silas
• Other Names: Pal H. Academic Editor.; Panczyk T. Academic Editor.; Strout D. Academic Editor.
• Is Part Of: ISRN physical chemistry. Volume 2012(2012)
• Publication Date: 2012-10-31
• Subjects: Chemistry, Physical and theoretical -- Periodicals; Chemistry, Physical and theoretical; 35.10 physical chemistry: general; Periodicals; Electronic journals; 541
• DOI: 10.5402/2012/254167
• Languages: English
• ISSNs: 2090-7761

Abstract

Abstract : The interaction of ethanol vapour at 293 K with modified Corning controlled porous glass (CPG-10) samples of various pre-silylation is reported. Ethanol adsorption on CPG-10 was greatly reduced by silylation to extents largely depending on the silylation extent, type of silane used, and on the concentration and accessibility of residual silanols. The obtained adsorption isotherms, BET surface areas, as well as the observed changes at the various stages during the sorption particularly in the capillary condensation region also showed similar dependence. In the capillary condensation region, in the case of the dimethyl dichlorosilane-modified sample, hysteresis type was changed from H3 to H1. On the triethyl chlorosilane-modified sample an unexpected suppression of hysteresis effects occurred with a consequent transformation of type IV to type II adsorption isotherm.