Steric Stabilization of Colloids by Poly(dimethylsiloxane) in Carbon Dioxide: Effect of Cosolvents

In-Situ Investigation on the Mechanism of Dispersion Polymerization in Supercritical Carbon Dioxide

“…An increase in the solvent strength due to monomer will significantly increase PDMS chain extension from the particle surface enhancing steric stabilization. 35 In our case, the particle size decreases with monomer concentration since the stabilization of the PDMS chains increases. However, the final particle size increased with increasing monomer concentration as has been observed in other studies.…”

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

“…However, this relationship has been studied primarily for symmetric systems where the properties of each segment on the polymer match those of the solvent. For colloids stabilized with PDMS, flocculation was still present for pressures 156 bar above the USCD at 25 • C [37], perhaps due to asymmetry in the system and long-range attraction between the colloid surface and the tails [38].…”

The solubility of low molecular weight Poly(Dimethyl siloxane) in dense CO2 and its use as a CO2-philic segment

“…PDMS is of particular interest in the generation of CO 2 -soluble amphiphiles because this silicone polymer is relatively easy to end-functionalize. Therefore PDMS has been used as a CO 2 -philic segment in conjunction with CO 2 -phobic functional groups in the design of novel CO 2 -soluble dispersants [34], surfactants [35][36][37][38][39], chelating agents [40], and post-combustion CO 2 capture solvents [41], as shown in Table 1. However, the effect of varying the molecular weight of the PDMS segment on the CO 2solubility of an end-functionalized PDMS has not been systematically documented in these prior studies.…”