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Study of Penetration of Water into Hydrophobized Porous Silicas

✍ Scribed by Alexander Y. Fadeev; Valentine A. Eroshenko

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
212 KB
Volume
187
Category
Article
ISSN
0021-9797

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✦ Synopsis

Intrusion of water into a pore space of silicas hydrophobized with alkylsilanes is studied. The water porosimetry technique is introduced and construction of a water porosimeter is described. The effects of bonded alkyl chain length, bonding density, structure of alkylsilane, and average pore diameter of silica on the parameters of water intrusion are studied. Advancing and receding angles of water on chemically modified silica surfaces are estimated. It is shown that contact angles increase as bonding density and bonded chain length are increased. The correlation between the structure of a bonded alkylsilane monolayer and its hydrophobicity is discussed.

πŸ“œ SIMILAR VOLUMES

Spontaneous Penetration of Liquids into
Spontaneous Penetration of Liquids into Capillaries and Porous Membranes Revisited
✍ Konstantin G. Kornev; Alexander V. Neimark πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 138 KB

A critical review of the problem of spontaneous penetration of a wetting liquid into pore channels shows that no theory exists to quantitatively predict the initial stage of imbibition. Since C. H. Bosanquet (1923, Phil. Mag. 45, 525), the theory operates with an universal velocity U Bosanquet = (2Ξ³