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Sodium stearate adsorption onto titania pigment

Capelle, H and Britcher, L and Morris, Gayle E (2003) Sodium stearate adsorption onto titania pigment. Journal of Colloid and Interface Science, 268 (2). pp. 293-300. ISSN 0021-9797

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Abstract

The interaction of sodium stearate with titania pigment particles from aqueous suspension has been investigated using thermal analysis and infrared spectroscopy combined with electrochemical studies. Thermogravimetric analysis (TGA) was used both to determine the adsorption isotherm and to investigate the interaction behavior. Monolayer coverage is determined to be 0.95 mg/m2; however, unlike the case with organic solvents, multilayer adsorption occurs. Diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, combined with TGA, revealed that the surface monolayer is chemically bound. DRIFT spectroscopic data also indicated that the stearate bridged across two aluminum atoms. Subsequent stearate layers were physisorbed to the stearate monolayer and were readily removed with acetone washing.

Item Type: Article
Uncontrolled Keywords: ResPubID12289, Titanium dioxide, Alumina, Sodium stearate, adsorption, DRIFT spectroscopy, TGA
Subjects: Faculty/School/Research Centre/Department > Other
Depositing User: VUIR
Date Deposited: 15 Apr 2011 00:57
Last Modified: 05 Mar 2014 11:23
URI: http://vuir.vu.edu.au/id/eprint/2381
DOI: 10.1016/j.jcis.2003.08.031
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Citations in Scopus: 20 - View on Scopus

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