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dc.contributor.authorBlake, T D-
dc.contributor.authorKitchener, J A-
dc.date.accessioned2025-02-03T06:41:48Z-
dc.date.available2025-02-03T06:41:48Z-
dc.date.issued1972-
dc.identifier.urihttp://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/17034-
dc.description.abstractExperiments in which a small gas bubble was slowly advanced towards a polished silica plate under dilute aqueous solutions have shown that “ thick ” equilibrium films are formed not only on clean, hydrophilic, silica, but also on methylated, hydrophobic, silica. The latter films are metastable, collapsing when disturbed and forming a contact angle which may be as large as 90°. Surprisingly, the thicknesses of the metastable films are apparently independent of the contact angle. The variation of film thickness with electrolyte concentration indicates that over the measured range (60 to 220 nm) the stability is due to an electrical double layer associated with the clean or the methylated silica/water interface. The instability at smaller film thicknesses has been attributed basically to reduced hydrogen bonding at the solid/water interface. The findings have a bearing on the theory of froth flotation—in particular, on the kinetics of particle/bubble contact and the “ salt flotation ” of weakly hydrophobic materials such as coal.en_US
dc.language.isoenen_US
dc.publisherJournal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (8)en_US
dc.subjectChemistryen_US
dc.subjectAqueous Filmsen_US
dc.subjectHydrophobicen_US
dc.subjectMethylated Silicaen_US
dc.subjectJournal of the Chemical Society : Faraday Transaction - Ien_US
dc.titleStability of Aqueous Films on Hydrophobic Methylated Silicaen_US
dc.typeArticleen_US
Appears in Collections:Journal Articles (before-1995)

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