Interaction forces between particles stabilized by a hydrophobically modified inulin surfactant

Journal of Colloid and Interface Science
Jérémie NestorTharwat Tadros

Abstract

The adsorption isotherm of a hydrophobically modified inulin (INUTEC SP1) on polystyrene (PS) and poly(methyl methacrylate) (PMMA) particles was determined. The results show a high affinity isotherm for both particles as expected for a polymeric surfactant adsorption. The interactions forces between two layers of the hydrophobically modified inulin surfactant adsorbed onto a glass sphere and plate was determined using a modified atomic force microscope (AFM) apparatus. In the absence of any polymer, the interaction was attractive although the energy of interaction was lower than predicted by the van der Waals forces. The results between two layers of the adsorbed polymer confirms the adsorption isotherms results and provides an explanation to the high stability of the particles covered by INUTEC SP1 at high electrolyte concentration. Stability of dispersions against strong flocculation could be attributed to the conformation of the polymeric surfactant at the solid/liquid interface (multipoint attachment with several loops) which remains efficient at Na(2)SO(4) concentration reaching 1.5 mol dm(-3). The thickness of the adsorbed polymer layer in water determined both by AFM and rheology measurements, was found to be about 9 nm.

References

Jun 24, 2003·Advances in Colloid and Interface Science·Phil Attard
Jul 28, 2004·Journal of Colloid and Interface Science·Michael Musoke, Paul F Luckham
May 18, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Jérémie NestorTharwat Tadros

Citations

Mar 8, 2011·Advances in Colloid and Interface Science·Tharwat Tadros
Aug 13, 2010·Journal of Colloid and Interface Science·Yoon Sung NamHan Kon Kim
Dec 2, 2008·Advances in Colloid and Interface Science·Tharwat Tadros
Oct 22, 2008·Advances in Colloid and Interface Science·D Exerowa, Dimo Platikanov
May 8, 2008·Advances in Colloid and Interface Science·Brian Vincent
Jul 12, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Ingo HoffmannMichael Gradzielski
May 3, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Ingo HoffmannMichael Gradzielski
Oct 21, 2016·Scientia pharmaceutica·Heni RachmawatiCornelia M Keck
Oct 2, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Sudhir VermaDiane J Burgess

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