| 초록 |
W/C microemulsions can be considered as a new type of green medium for dissolving polar compounds or metal species in supercritical carbon dioxide. Recently, several surfactants including a fluorocarbon-hydrocarbon hybrid surfactant and amphiphilic block copolymer surfactant with hydrophilic part and CO2-philic part have been shown to dissolve in CO2. However, these surfactants are obtained through complex and difficult processes.In the present work, we proposed perfluorinated homopolymers, PMA-Rf,PMMA-Rf,PEO-Rf and PS-Rf as surfactants in W/C microemulsion. To confirm possibility as surfactants in W/C microemulsion, we carried out phase behavior measurement using variable volume view cell for CO2 + H2O + surfactant system with varying molar ratios of water to surfactant (wo). And dispersion polymerization of PMMA, PVP and PVCL was performed in scCO2 using PMA-Rf, PMMA-Rf, PEO-Rfand PS-Rf as surfactant to find out relation and difference of role as surfactants in W/C microemulsion and in dispersion polymerization, respectively. |
