Organogels with CO2-philic surfactants
Contrast variation SANS will be used to probe structure in thermoresponsive organogels comprising of custom-synthesized surfactants (figure 5 a-c) and low molecular weight organogelators (LMOGs). These LMOGs (para-substituted phenols, figure 5 d) are a welcome change to the field due to their relatively low cost and commercial availability. They are markedly different from other LMOGs, which are both time consuming and laborious to synthesize. It is intended to test the proposed stacked phenol structure2-5 using contrast variation. Thermoresponsive structures will be explored around the pronounced ‘melting’ point, where a sharp decrease in viscosity is observed. Novel surfactants will be studied which have been specifically designed for low dielectric solvents such as supercritical CO2 (scCO2 figure 5 b-c). The structures of Co2+ and Ni2+ surfactant based gels will be investigated. This research is supported by the G8 Research Councils Initiative on Multilateral Research Funding - G8-2012 - EP/K020676/1 and an STFC funded studentship ‘Controlling fluid properties of dense CO2’. New results are included, in response to the suggestion on a previous submission 9-10-1428.
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EASTOE Julian; CZAJKA Adam; GRILLO Isabelle; HAZELL Gavin; NAVARRO Miguel; Jocelyn Peach and PEGG Jonathan. (2015). Organogels with CO2-philic surfactants. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-434
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