NDLI: Oily Grime Formed on Hard Surfaces of Kitchen Appliances: (Part 2) Kinetics of Oily Grime Removal

Content Provider	Springer Nature Link
Author	Yamada, Kaoru Tsutsui, Takuya Natsuhara, Masahiko Tanizawa, Yoshiaki
Copyright Year	2007
Abstract	The oily grime adsorbed to the surfaces of kitchen appliances ages to become difficult to remove using normal dishwashing detergents. Artificial grime models similar to actual grime were prepared using composition data of the oily grime obtained in previous work. To evaluate typical cleaning products, one needs to observe their efficacy against actual and artificial grime using precise and objective evaluation methods. In the present work, the kinetic method was applied to actual kitchen grime. The grime-removal rate constants were calculated by monitoring absorbance of the cleaning fluids, and the results are discussed based on the compositions of the detergents and grime. One commercial detergent, with pH adjusted to 9.7, consisted mainly of spirit solvent and had two rate constants, k $_{1}$ (fast) and k $_{2}$ (slow), which indicated the removal rates of THF-soluble and THF-insoluble oily grime, respectively. With a second commercial detergent that contained mainly an alkali agent at pH 11.8, the removal rates were extremely fast for both THF-soluble and THF-insoluble grime. The alkalinity worked effectively against both types of grime. The effects on the removal rates of various ingredients that could be added to the cleaning products were also investigated and the overall removal rates were highly dependent on the pH of the fluids and slightly dependent on the kinds of alkalies used. The present kinetic method was found to be useful for evaluating the capability of the detergents. The plural rate constants observed for a single grime sample, which previously were not well understood, could be interpreted in terms of the compositions of the grime.
Starting Page	167
Ending Page	173
Page Count	7
File Format	PDF
ISSN	10973958
Journal	Journal of Surfactants and Detergents
Volume Number	10
Issue Number	3
e-ISSN	15589293
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-06-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kitchen grime Oily dirt Grime-removal kinetics Kinetics of detergency Thermal oxidation of fats and oils Physical Chemistry Analytical Chemistry Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Polymer Sciences Surfaces and Interfaces, Thin Films Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Physical and Theoretical Chemistry Chemical Engineering

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