Comparison of complex coacervate core micelles from two diblock copolymers or a single diblock copolymer with a polyelectrolyte.

P.S. Hofs, I.K. Voets, A. de Keizer, M.A. Cohen Stuart

    Research output: Contribution to journalArticleAcademicpeer-review

    53 Citations (Scopus)

    Abstract

    With light scattering titrations, we show that complex coacervate core micelles (C3Ms) form from a diblock copolymer with a polyelectrolyte block and either an oppositely charged polyelectrolyte, a diblock copolymer with an oppositely charged polyelectrolyte or a mixture of the two. The effect of added salt and pH on both types of C3Ms is investigated. The hydrodynamic radius of mixed C3Ms can be controlled by varying the percentage of oppositely charged polyelectrolyte or diblock copolymer. A simple core-shell model is used to interpret the results from light scattering, giving the same trends as the experiments for both the hydrodynamic radii and the relative scattering intensities. Temperature has only a small effect on the C3Ms. Isothermal titration calorimetry shows that the complexation is mainly driven by Coulombic attraction and by the entropy gain due to counterion release
    Original languageEnglish
    Pages (from-to)4242-4251
    JournalPhysical Chemistry Chemical Physics
    Volume8
    Issue number36
    DOIs
    Publication statusPublished - 2006

    Keywords

    • block-copolymers
    • stability
    • chains

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