Pigment encapsulation by emulsion polymerization using macro-RAFT copolymers

Langmuir : the ACS Journal of Surfaces and Colloids
Duc NguyenBrian S Hawkett

Abstract

A new method is described, based on living amphipathic random macro-RAFT copolymers, which enables the efficient polymeric encapsulation of both inorganic and organic particulate materials via free-radical polymerization. The mechanism for this new approach is examined in the context of the polymer coating of zirconia- and alumina-coated titanium dioxide particles and its breadth of application demonstrated by the coating of organic phthalocyanine blue pigment particles. The particulate materials were first dispersed in water using a macro-RAFT copolymer as a stabilizer. Monomer and water-soluble initiator were then added to the system, and the monomer polymerized to form the coating. If nucleation of new polymer particles in the aqueous phase was to be avoided, it was found necessary to use a macro-RAFT copolymer that did not form micelles; within this constraint, a broad range of RAFT agents could be used. The macro-RAFT agents used in this work were found not to transfer competitively in the aqueous phase and therefore did not support growth of aqueous-phase polymer. Successful encapsulation of particles was demonstrated by TEM. The process described enables 100% of the particles to be encapsulated with greater than 95% of t...Continue Reading

References

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Citations

Sep 17, 2013·International Journal of Pharmaceutics·Rachid LadjAbdelhamid Elaissari
Aug 17, 2012·Journal of the American Chemical Society·Félix FreireRicardo Riguera
Jul 20, 2013·Journal of Colloid and Interface Science·Jérôme GarnierAlex van Herk
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May 19, 2012·Macromolecular Rapid Communications·Jérôme GarnierAlex M van Herk
Aug 28, 2015·Chemical Reviews·Per B ZetterlundMuriel Lansalot
Nov 4, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Marko PavlovicIstvan Szilagyi
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Oct 5, 2019·Angewandte Chemie·Franck D'AgostoMuriel Lansalot
Apr 29, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Thiago Rodrigues GuimarãesElodie Bourgeat-Lami
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May 1, 2009·The Journal of Physical Chemistry. B·Dominik KonkolewiczSébastien Perrier
Nov 10, 2020·Advances in Colloid and Interface Science·Robert E McMillinJames K Ferri
Apr 15, 2021·Macromolecular Rapid Communications·Duc NguyenBrian Hawkett
Mar 30, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Syed Imran AliAlex M van Herk
Aug 14, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Thaíssa de Camargo ChaparroElodie Bourgeat-Lami
Jun 9, 2020·Biomacromolecules·Alexander M van Herk
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Mar 9, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Binh T T PhamBrian S Hawkett
Aug 11, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Rodrigo Duarte SilvaAmilton Martins Dos Santos

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