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Adsorption of Stearic Acid and Diethylhexyl Phosphate on Magnetic Metallic Iron Pigments: Electrical Surface Charging and Adsorption Competition

✍ Scribed by Eugène Papirer; Eric Walter; Alain Vidal; Bernard Siffert

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
501 KB
Volume
187
Category
Article
ISSN
0021-9797

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✦ Synopsis

The adsorption of stearic acid and bis(2-ethylhexyl) phosphate, from toluene and THF solutions, on magnetic iron pigments (MP) was examined. Adsorption isotherms as well as the concomitant variations of surface electrical (zeta) potential were determined. The formation of electrical surface charges is explained by charge transfer processes between the solvents, the adsorbates, and MP. An adsorption competition is evidenced when contacting MP with the adsorbates using 14C-labeled stearic acid.

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