The adsorption of non-ionic surfactants on carbon black particles in hydrocarbon media

Kozak, Darby, Moreton, David and Vincent, Brian (2009) The adsorption of non-ionic surfactants on carbon black particles in hydrocarbon media. Colloids and Surfaces A, 347 1-3: 245-250. doi:10.1016/j.colsurfa.2009.07.020

Author Kozak, Darby
Moreton, David
Vincent, Brian
Title The adsorption of non-ionic surfactants on carbon black particles in hydrocarbon media
Journal name Colloids and Surfaces A   Check publisher's open access policy
ISSN 0927-7757
Publication date 2009-09-05
Sub-type Article (original research)
DOI 10.1016/j.colsurfa.2009.07.020
Volume 347
Issue 1-3
Start page 245
End page 250
Total pages 6
Editor Yasuhisa Adachi
M. Cohen Stuart
H. Ohshima
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Subject 0306 Physical Chemistry (incl. Structural)
0904 Chemical Engineering
0914 Resources Engineering and Extractive Metallurgy
Formatted abstract
Demand for improved fuel efficiency, decreased pollution emissions, and prolonged engine lifespan have given rise to the need for improved fuel and engine oil properties. In particular, the dispersion of carbon deposits is an important consideration. To this end, the adsorption of eight non-ionic, potential fuel-additive surfactants on carbon black particles from iso-octane solutions has been examined and compared. The surfactants all contain poly(iso-butylene) (PIB) tails of varying lengths and head groups based on phenol or amine-substituted phenols of various kinds. For the amine-substituted phenol surfactants, changes in the surfactant structure (number and type of amine groups in the head group and the PIB tail length) were observed to have no significant effect on the heat of adsorption, determined calorimetrically. However, changes were observed in the maximum adsorbed amount for the surfactants with different head group structures and PIB tail lengths. These are explained in terms of changes in the varying extents of solvent rejection of the different surfactants. In hydrocarbon media containing these surfactants, the only surfactants that showed anything other than marginal improvement in the stability to aggregation of dispersions of carbon black were those containing primary or secondary amine groups. Those surfactants with only tertiary amine groups showed no significant improvement in dispersion stability compared to dispersions of the bare particles. In the case of the primary and secondary amine groups, this is explained in terms of proton exchange between the head groups of the surfactant molecules and acid groups on the surface.
© 2009 Elsevier B.V. All rights reserved.
Keyword Surfactant adsorption
Carbon black
Fuel surfactants
Apolar media
Q-Index Code C1
Q-Index Status Provisional Code
Additional Notes Special Issue: "Interfaces Against Pollution - 5th International Conference on Interfaces Against Pollution 2008, Kyoto, Japan, 1-4 June 2008." This paper did not appear at that conference. Author prepress title: "Carbon Black Suspensions in Hydrocarbon Media via the Adsorption of Non-Ionic Surfactants".

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Australian Institute for Bioengineering and Nanotechnology Publications
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Created: Fri, 01 Oct 2010, 00:49:20 EST by Jon Swabey on behalf of Aust Institute for Bioengineering & Nanotechnology