Critical flocculation density of dilute water-in-CO2 emulsions stabilized with block copolymers

Effect of branching on the interfacial properties of nonionic hydrocarbon surfactants at the air–water and carbon dioxide–water interfaces

“…Greater CO 2 solvation of poly(1,1-dihydroperfluoroctyl methacrylate)-b-poly(ethylene oxide) tails as indicated by less flocculation of W/C miniemulsions droplets was found at higher temperatures [79]. Greater extension and solvation of polymer brushes in CO 2 as well as end-grafted polymers on silica has also occurred with an increase in temperature [78,81].…”

“…This behavior has been investigated by optical microscopy [14], turbidimetry [78][79][80], SANS [81,82], and Monte Carlo simulations [83]. When the density is held constant, the C-W c o decreases slightly as the temperature is elevated up to 70°C.…”

Novel Semiconducting Polymer Particles by Supercritical Fluid Process

“…PFOMA was prepared by atom transfer radical polymerization of 1H,1H,2H,2H-perfluorooctyl methacrylate (Aldrich). [20] Synthesis of Poly [2-(3- PSFTE was synthesized as previously reported. [16] In a typical polymerization process, the monomer (SFTE) and oxidant (FeCl 3 ) were mixed in the ratio of 1:4 in a 36 mL dried stainless-steel reactor equipped with a Teflon-coated magnetic stir bar, and the system was purged with pure CO 2 (purity >99.9%).…”

Decontamination of Radioactive Contaminants Using Liquid and Supercritical CO2

“…To date, a majority of the investigation into the formation of macroemulsions in CO 2 has focused on the development of surfactants. Johnston found that water-in-supercritical CO 2 (W/C) emulsions were formed with a variety of surfactants such as fluorinated [26,27], block copolymer [28][29][30], nonionic polymer [31], and hydrocarbon [32].…”