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  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > August  >
Chemistry for Everyone
A Superficial Overview of Detergency
J. A. Poce-Fatou
Departamento de Química Física, Facultad de Ciencias, Polígono del Río San Pedro, 11510 Puerto Real, Cádiz, Spain
Cover
August 2006
Vol. 83 No. 8
p. 1147
Abstract
An introduction to a study of detergency is based on the role played by surface-active agents, that is, surfactants. Typical concepts of surface chemistry such as the work of adhesion, Young and Young–Dupré equations, or the spreading coefficient are used to explain the mechanisms involved in the removal of both liquid and particulate dirt. The role of emulsions, micelles, and lather is also analyzed. By means of physicochemical arguments, this article justifies the use of bath sponges, explains how washing machines work, or why it is easier to do the washing up if the dishes have been previously immersed in water. The article also includes general considerations about the nature of the surfactants used in commercial products. It will provide instructors and students with an interest in surface chemistry a link between theoretical principles and practical explanations of everyday activities.
Supplement
Details of mathematical concepts used in this article are available.
*  Contents JCE2006p1147W.doc (Microsoft Word)
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*  Citation
 Poce-Fatou, J. A. J. Chem. Educ. 2006 83 1147.
*  Keywords
 Colloids; Micelles; Physical Chemistry; Solutions / Solvents; Surface Science; Textbooks / Reference Books; Thermodynamics; Upper-Division Undergraduate; Water / Water Chemistry
*  History
 Created:
Last Updated:		 6/21/2006
6/30/2006
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