Emulsion and Wetting Films Stabilized by Hydrophobically Modified Inulin Polymeric Surfactant

Autor:	Bart Levecke, Dimo Platikanov, Dotchi Exerowa, Tharwat F. Tadros
Rok vydání:	2009
Předmět:	Chromatography Aqueous solution Polymers and Plastics Chemistry Disjoining pressure Electrolyte Surfaces Coatings and Films Hydrophobic effect Pulmonary surfactant Chemical engineering Emulsion DLVO theory Wetting Physical and Theoretical Chemistry
Zdroj:	Journal of Dispersion Science and Technology. 30:789-794
ISSN:	1532-2351 0193-2691
DOI:	10.1080/01932690802643303
Popis:	Emulsion films of hydrophobically modified inulin (INUTEC SP1) polymeric surfactant, both in aqueous solution and in the presence of different electrolyte (NaCl, Na2SO4, MgSO4) concentrations have been studied. At constant disjoining pressure of 36 Pa the film thickness h w decreased with increase in electrolyte concentration until a critical value, C el,cr, was reached above which h w remained constant. This reduction in film thickness below C el,cr could be accounted for by the compression of the double layer. At a critical pressure that depends on the electrolyte type, the film jumped to a Newton Black Film (NBF) that remained very stable up to very high disjoining pressure at all electrolyte concentrations and electrolyte types studied. The polyfructose loops and tails in this NBF remain strongly hydrated and these results explain the high stability against coalescence of such INUTEC SP1 emulsions. Wetting films from INUTEC SP1 aqueous solutions on a hydrophilic quartz substrate were also studied. The...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::45bffcbef012e5ade50213b9378c05ba https://doi.org/10.1080/01932690802643303 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.