Short Review on Recent Trends in Dispersing Nanoclay Particles into Polymer Matrices Using Supercritical Carbon Dioxide

Recent advances in catalyst immobilization using supercritical carbon dioxide*

Homogeneous organometallic catalysts have a great potential for the development of sustainable synthetic processes. There is, however, an urgent need for the development of new techniques to separate products and catalysts efficiently, allowing for recycling and reuse of the precious catalyst. The unique solvent properties of supercritical carbon dioxide offer new approaches for the immobilizat...

Low-density polymer thin film formation in supercritical carbon dioxide

We report a method for producing stable low-density polymer films by using supercritical carbon dioxide (scCO2). Two different molecular weight polystyrene films with various thicknesses were exposed to scCO2 along the density fluctuation ridge in P – T phase diagram. The swollen structures could be then frozen by flash evaporation of CO2 without forming additional voids. X-ray reflectivity dat...

Synthesis of cross-linked polymer microspheres in supercritical carbon dioxide

Herein we report the synthesis of highly cross-linked polymers based on divinylbenzene by heterogeneous polymerization in supercritical CO2 (scCO2). The polymers were isolated in the form of discrete microspheres (diameter = 1.5–5 lm) in good yields (F90%), in the absence of any stabilizers. In the presence of a CO2-soluble polymeric stabilizer, much smaller particles (diameter a0.5 lm) were fo...

Synthesis of Polyurethane Particles in Supercritical Carbon Dioxide

SUPERCRITICAL CARBON DIOXIDE Eric Cloutet, Benjamin Renault, Thierry Tassaing, Patrick Lacroix-Desmazes, Henri Cramail Laboratoire de Chimie des Polymères Organiques, ENSCPB-CNRS-Université Bordeaux 1 (UMR 5629), 16 Avenue Pey-Berland, 33607 Pessac cedex, France Institut des Sciences Moléculaires, CNRS-Université Bordeaux 1 (UMR 5255), 351 Cours de la Libération, 33405 Talence cedex, France Lab...

Vetiver Oil Extraction Optimization Using Supercritical Carbon Dioxide Fluid