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Use of anchoring amphiphilic diblock copolymers for encapsulation of hydrophilic actives in polymeric microcapsules: methodology and encapsulation efficiency

Journal article
Authors M. A. Trojer
Asvad A Gabul-Zada
Anna Ananievskaia
L. Nordstierna
M. Ostman
Hans Blanck
Published in Colloid and Polymer Science
Volume 297
Issue 2
Pages 307-313
ISSN 0303-402X
Publication year 2019
Published at Department of Biological and Environmental Sciences
Pages 307-313
Language en
Links dx.doi.org/10.1007/s00396-018-04463...
Keywords Microcapsules, Double emulsion, Polymer brushes, Encapsulation, Amphiphiles, controlled-release, charged microcapsules, double emulsions, adsorption, dispersant, separation
Subject categories Polymer Chemistry

Abstract

Aqueous core-shell particles based on polystyrene, poly(methyl methacrylate) or polycaprolactone have been formulated using a facile double emulsion-based solvent evaporation method. The size distribution is narrow, and the morphology control is remarkable given the simple characteristics of the encapsulation method. The inner droplets are stabilized by oil-soluble poly(ethylene oxide)-based block copolymers which are anchored in the polymeric shell by using hydrophobic blocks of the same type as that of the shell-forming polymer. This facilitates the efficient encapsulation of dyes and hydrophilic biocides.

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