Abstract
The impact of lipophilic linker and extended surfactant properties on admicelle formation and styrene adsolubilization were evaluated through adsorption and adsolubilization studies on aluminum oxide. While linker-based systems achieved a higher maximum adsorption than extended surfactants, the extended surfactants reached maximum adsorption at a lower aqueous surfactant concentration. Results of solubilization and adsolubilization studies are summarized by the extent of solute solubilization into micelles and admicelles, as captured through the micellar partition coefficient, K mic, and the admicellar partition coefficient, K adm. The extended-surfactant-based micelles showed greater solubilization capacity than linker-based micelles. Relative to the effect of the number of propoxy groups for extended surfactants with the same alkyl chain length, the results show that the solubilization capacity increases when the PO number increases for both C12,13- and C14,15-based surfactant series. Thus, adsolubilization using extended-surfactant-based admicelles showed adsolubilization enhancement but required lower amounts of surfactants to form admicelles. These results thus provide insights into external and internal linker-based and extended-surfactant-based admicellar systems and highlight the differences observed between them and admicelles based on conventional surfactant systems.
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Acknowledgment
Financial support for this work was provided by National Center of Excellence for Environmental and Hazardous Waste Management (NCE-EHWM), Chulalongkorn University, Thailand. In addition, financial support for this research was received from The 90th Years Anniversary of Chulalongkorn University (Ratchadphiseksomphot Endowment Fund), Chulalongkorn University, Thailand. Financial support for this research was also received from the industrial sponsors of the IASR, University of Oklahoma, including Akzo Noble, Clorox, Conoco/Phillips, Church & Dwight, Ecolab, Halliburton, Huntsman, Oxiteno, Procter & Gamble, Sasol, Shell and Unilever. Finally, funds from the Sun Oil Company Chair (DAS) at the University of Oklahoma helped support this research. We thank Geoff Russell from SASOL Company for providing us with the extended surfactants samples for this research.
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Charoensaeng, A., Sabatini, D.A. & Khaodhiar, S. Styrene Solubilization and Adsolubilization on an Aluminum Oxide Surface Using Linker Molecules and Extended Surfactants. J Surfact Deterg 11, 61–71 (2008). https://doi.org/10.1007/s11743-007-1055-1
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DOI: https://doi.org/10.1007/s11743-007-1055-1