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Demixing of colloid-polymer mixtures in poor solvents M. Schmidt and A. R. Denton, Phys. Rev. E 65, 061410 (2002). Locate in [bare] [illustrated] list. Get [full paper] as pdf. Extract. The influence of poor solvent quality on fluid demixing of a model mixture of colloids and nonadsorbing polymers is investigated. The solvent is modeled as a two-component mixture of a primary solvent, regarded as a background theta solvent for the polymer, and a cosolvent of point particles that are excluded from both colloids and polymers. With increasing cosolvent concentration worsening solvent quality, the predicted colloid-polymer demixing binodal shifts to lower colloid concentrations, promoting demixing. [more]  Read the [full paper] as pdf. |
Colloid-polymer mixtures: Beyond the AOV model
Extensions include taking into account an explicit solvent of point particles [27], penetrability of (small) colloids into polymers [28], colloid-induced polymer compression [31], the influence of polymer interactions on fluid-demixing [34] and on the contact angle of the colloidal liquid-gas interface and a hard wall [50], as well as the stability of the floating liquid phase in sedimenting colloid-polymer mixtures for non-ideal polymers [52].[more]