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Cross-linked polymer microparticles with tunable surface properties by the combination of suspension free radical copolymerization and Click chemistry.

Authors
  • Moratille, Yoanh1
  • Arshad, Muhammad2
  • Cohen, Celine3
  • Maali, Abdelhamid2
  • Lemaire, Elisabeth3
  • Sintes-Zydowicz, Nathalie4
  • Drockenmuller, Eric5
  • 1 Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France. , (France)
  • 2 Univ. Bordeaux, CNRS, LOMA, UMR 5798, Talence F-33405, France. , (France)
  • 3 Université Côte d'Azur, CNRS, InPhyNi-UMR 7010, Nice Cedex 2 06108, France. , (France)
  • 4 Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France. Electronic address: [email protected] , (France)
  • 5 Univ Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, Lyon F-69003, France. Electronic address: [email protected] , (France)
Type
Published Article
Journal
Journal of Colloid and Interface Science
Publisher
Elsevier
Publication Date
Sep 28, 2021
Volume
607
Issue
Pt 2
Pages
1687–1698
Identifiers
DOI: 10.1016/j.jcis.2021.09.012
PMID: 34598028
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

We propose a general, versatile and broad in scope two-steps approach for the elaboration of cross-linked polymer microparticles (µPs) with tunable functionalities and surface properties. Surface-functionalized cross-linked polymer µPs with diameter in the 80 μm range are prepared by the combination of: 1) suspension free radical copolymerization of styrene, propargyl methacrylate and 1,6-hexanediol dimethacrylate, 2) subsequent covalent tethering of a variety of azide-functionalized moieties (i.e. rhodamine B fluorescent dye or poly(ethylene glycol) (PEG) brush precursor) by copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) and, 3) optional N-alkylation of the 1,2,3-triazole groups followed by anion exchange reaction to afford covalently-tethered 1,2,3-triazolium ionic liquids with iodide or cresol red counter-anions. The resulting µPs are characterized by laser diffraction, differential scanning calorimetry, as well as by optical, confocal fluorescence, scanning electron and atomic force microscopies. Finally, the rheological properties of concentrated suspensions (volume fractions of 0.40 and 0.44) of the different synthesized µPs dispersed in a 1:1 (vol/vol) mixture of polyalkylene glycol and water are studied. The modification of µPs surface properties contributes not only to change the stability of the suspensions against flocculation, but also to significantly modify their rheological behavior at high shear stresses. This represents a clear experimental evidence of the importance of non-hydrodynamic contact forces in the rheology of non-Brownian suspensions (NBSs). Copyright © 2021 Elsevier Inc. All rights reserved.

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