NDLI: Wetting films on a hydrophilic silica surface obtained from aqueous solutions of hydrophobically modified inulin polymeric surfactant

Content Provider	Springer Nature Link
Author	Nedyalkov, Michail Alexandrova, Lidia Platikav, Dimo Levecke, Bart Tadros, Tharwat
Copyright Year	2007
Abstract	The thickness of wetting films on a hydrophilic silica surface was investigated using a microinterferometric technique. Aqueous solutions of hydrophobically modified inulin (INUTEC®SP1) at various concentrations, in the presence or absence of NaCl or Na2SO4, were studied. The equilibrium film thickness (h eq) showed a complex dependence on INUTEC®SP1 concentration. At low electrolyte concentrations, h eq decreased with an increase in INUTEC®SP1 concentration, reaching a minimum at 10−6 mol dm−3. However, at high electrolyte concentrations, this dependence became less pronounced. At any given INUTEC®SP1 concentration, the equilibrium film thickness decreased with an increase in electrolyte concentration as a result of the compression of the electrical double layer reaching a minimum value. After that, the film thickness showed a small decrease with further increase in electrolyte concentration. This indicates that the electrostatic component of disjoining pressure can be neglected, and the steric repulsion of the loops and tails of INUTEC®SP1 determined the film thickness.
Starting Page	1713
Ending Page	1717
Page Count	5
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	285
Issue Number	15
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-18
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Wetting films Equilibrium film thickness INUTEC®SP1 Polymeric surfactant Food Science Characterization and Evaluation of Materials Soft Matter, Complex Fluids Physical Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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