Influence of supercritical carbon dioxide on the morphology of modified clays

This research examines the influence of supercritical CO2 on five different organoclays, coated with either alkyl or phenyl ammonium surfactant. The supercritical fluid was found to alter the surfactant morphology, plasticizing the organic medium leading to further cation exchange within the galleries of the clay. For organoclays with a paraffin complex conformation, this change in the morphology resulted in basal expansion provided the tilt …