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PHASE-BEHAVIOR OF COLLOID-POLYMER MIXTURES

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Original languageEnglish
Pages (from-to)1127-1139
Number of pages13
JournalNuovo cimento della societa italiana di fisica d-Condensed matter atomic molecular and chemical physics fluids plasmas biophysics
Volume16
Issue number8
Publication statusPublished - Aug 1994
EventI International Conference on Scaling Concepts and Complex Fluids - COPANELLO, Italy
Duration: 4 Jul 19948 Jul 1994

Abstract

We review the phase behaviour of mixtures of colloids and non-adsorbing polymers. The exclusion of polymer molecules from overlapping ''depletion zones'' between two neighbouring colloidal particles results in an unbalanced osmotic pressure pushing the particles together. This depletion potential is separately tunable in range and depth. Theory predicts that the resulting phase behaviour is sensitive to xi = r(g)/R, the ratio of the radius of gyration of a polymer molecule, to the radius of the colloid. At large xi, a stable colloidal liquid phase becomes possible. This has been confirmed by recent experiments. The formation of non-equilibrium ''transient gel'' states when the size ratio is small (approximate to 0.08) is also introduced briefly.

    Research areas

  • NONADSORBING POLYMER, FRACTAL AGGREGATION, DISPERSIONS, SEPARATION, SUSPENSIONS, MOLECULES, SYSTEMS, SPHERES, PERCOLATION, SIMULATION

Event

ID: 16976922