The Phase Behavior of Dispersions of Silica Particles in Mixtures of Polystyrene and Dimethylformamide

Juan Zhou, Jeroen S. van Duijneveldt, Brian Vincent

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)

Abstract

Depletion-induced phase separation in mixtures of charged silica particles and nonadsorbing polymer near theta conditions (polystyrene in dimethylformamide) was studied. The colloid polymer size ratio q was varied through the particle size and the electrical double layer thickness (kappa(-1)) through addition of lithium chloride (LiCl). The dependence of the phase boundaries, and the nature of the separated phases, on q and kappa is reported and is found to be in good agreement with recent theoretical predictions (Gogelein, C.; Tuinier, R. Eur. Phys. J., E 2008, 27, 171-184).

Original languageEnglish
Pages (from-to)9397-9402
Number of pages6
JournalLangmuir
Volume26
Issue number12
DOIs
Publication statusPublished - 15 Jun 2010

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