NDLI: Microemulsion formation and detergency with oily soils: III. Performance and mechanisms

Content Provider	Springer Nature Link
Author	Tongcumpou, C. Acosta, E. J. Quencer, L. B. Joseph, A. F. Scamehorn, J. F. Sabatini, D. A. Yanumet, N. Chavadej, S.
Copyright Year	2005
Abstract	The objective of this study was to investigate the correlation between oily soil removal efficiency and low oil-water interfacial tension (IFT) generated by microemulsion formation. A mixture of sodium dioctyl sulfosuccinate, alkyl diphenyl oxide disulfonate, and sorbitan monooleate was selected as a detergent formulation to evaluate detergency performance for two highly hydrophobic oils: hexadecane and motor oil. The maximum detergency corresponds to formation of a Winsor Type III microemulsion as well as to the supersolubilization region, which is a Winsor Type I microemulsion close to the Winsor Type III region. In addition, the oil removal in the rinse step is almost as high as that in the wash step for both regions. We propose the following mechanism to explain these results: During the wash step, the contact angle of the oil on the fabric surface is progressively increased, resulting in the detachment of the oil droplets. However, owing to the very low IFT, the spreading effect is dominant, thereby causing incomplete oil removal. During the subsequent rinse step, the IFT increases, passing through a composition at which the rollup mechanism causes additional oil removal. These results demonstrate that microemulsion formation and the resulting IFT reduction are important mechanisms in oily soil detergency.
Starting Page	147
Ending Page	156
Page Count	10
File Format	PDF
ISSN	10973958
Journal	Journal of Surfactants and Detergents
Volume Number	8
Issue Number	2
e-ISSN	15589293
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkyl diphenyl oxide disulfonate detergency microemulsion oil removal mechanism spreading effect Analytical Chemistry Physical Chemistry Polymer Sciences Industrial Chemistry/Chemical Engineering Surfaces and Interfaces, Thin Films Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Physical and Theoretical Chemistry Chemical Engineering

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