Effect of Interfacial Microstructure of Adsorbed Poly(ethylene glycol) Monooleate on Steel Substrate on Sliding Friction in Oil in Water Emulsion

Kanagalasara, Vathsala and Saxena, Deepak and Biswas, Sanjay K (2012) Effect of Interfacial Microstructure of Adsorbed Poly(ethylene glycol) Monooleate on Steel Substrate on Sliding Friction in Oil in Water Emulsion. In: Journal of Physical Chemistry C, 116 (39). pp. 20830-20838.

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Abstract

The concentration of a nonionic surfactant and water pH were varied in an oil-in-water emulsion to minimize the friction coefficient between a steel ball sliding on a steel flat. At a surfactant concentration near the CMC (critical micelle concentration) the oil droplet size was found to be minimum. In this paper we study the microstructure of the surfactant molecules self-assembled on the steel substrate in water to comment on the ability of the surfactant aggregate to attract and retain oil. We find that a near semicylindrical hemimiceller microstructure with hydrocarbon tails projecting into bulk water as obtained at CMC in near neutral water is best able to capture and retain oil in yielding a low coefficient of friction.

Item Type:	Journal Article
Publication:	Journal of Physical Chemistry C
Publisher:	American Chemical Society
Additional Information:	Copyright for this article is belongs to American Chemical Society.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	10 Dec 2012 07:21
Last Modified:	10 Dec 2012 07:21
URI:	http://eprints.iisc.ac.in/id/eprint/45224

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