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Low Fluorine Content CO2-philic Surfactants

Mohamed, Azmi, Sagisaka, Masanobu, Guittard, Frederic, Cummings, Stephen, Paul, Alison, Rogers, Sarah E., Heenan, Richard K., Dyer, Robert and Eastoe, Julian 2011. Low Fluorine Content CO2-philic Surfactants. Langmuir 27 (17) , pp. 10562-10569. 10.1021/la2021885

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Abstract

The article addresses an important, and still unresolved question in the field of CO2 science and technology: what is the minimum fluorine content necessary to obtain a CO2-philic surfactant? A previous publication (Langmuir2002, 18, 3014) suggested there should be an ideal fluorination level: for optimization of possible process applications in CO2, it is important to establish just how little F is needed to render a surfactant CO2-philic. Here, optimum chemical structures for water-in-CO2 (w/c) microemulsion stabilization are identified through a systematic study of CO2-philic surfactant design based on dichain sulfosuccinates. High pressure small-angle neutron scattering (HP-SANS) measurements of reversed micelle formation in CO2 show a clear relationship between F content and CO2 compatibility of any given surfactant. Interestingly, high F content surfactants, having lower limiting aqueous surface tensions, γcmc, also have better performance in CO2, as indicated by lower cloud point pressures, Ptrans. The results have important implications for the rational design of CO2-philic surfactants helping to identify the most economic and efficient compounds for emerging CO2 based fluid technologies.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: American Chemical Society
ISSN: 0743-7463
Last Modified: 04 Jun 2017 02:57
URI: http://orca-mwe.cf.ac.uk/id/eprint/14576

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