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

Bas Hofs (Corresponding author), Ilja K. Voets, Arie de Keizer, Martien A. Cohen Stuart

Research output: Contribution to journalArticleAcademicpeer-review

55 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
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume8
Issue number36
DOIs
Publication statusPublished - 18 Oct 2006
Externally publishedYes

Fingerprint

Dive into the research topics of 'Comparison of complex coacervate core micelles from two diblock copolymers or a single diblock copolymer with a polyelectrolyte'. Together they form a unique fingerprint.

Cite this