This proposal is to probe the gel structure with High Pressure SANS (HP-SANS) using an in-line pressure cell. The ability to control the properties of supercritical CO2, particularly the system viscosity, is an area that holds much promise in the fields of enhanced oil recovery (EOR) and carbon capture and sequestration (CCS)1,2, as well as a potential replacement for volatile organic solvents. Progress in this field has recently been reviewed by Peach et al.3. This research has received external publicity through the UK government agency UK trade and Investment (UKTI)8 and is supported by an STFC funded studentship ST/L502613/1 - ¿Controlling fluid properties of dense CO2¿ and the G8 Research Councils Initiative on Multilateral Research Funding - G8-2012 - EP/K020676/1.