Garnier, J.; Warnant, J.; Lacroix-Desmazes, P.; Dufils, P.-E.; Vinas, J.; Herk, A. V., Sulfonated macro-RAFT agents for the surfactant-free synthesis of cerium oxide-based hybrid latexes. Journal of Colloid and Interface Science 2013, 407, p 273–281.
Abstract:
Three types of amphiphatic macro-RAFT agents were employed as compatibilizers to promote the polymerization reaction at the surface of nanoceria for the synthesis of CeO2-based hybrid latexes. Macro-RAFT copolymers and terpolymers were first synthesized employing various combinations of butyl acrylate as a hydrophobic monomer and acrylic acid (AA) and/or 2-acrylamido-2-methylpropane sulfonic acid (AMPS) as hydrophilic monomers. After characterizing the adsorption of these macro-RAFT agents at the cerium oxide surface by UV–visible spectrometry, emulsion copolymerization reactions of styrene and methyl acrylate were then carried out in the presence of the surface-modified nanoceria. Dynamic Light Scattering and cryo-Transmission Electron Microscopy were employed to confirm the hybrid structure of the final CeO2/polymer latexes, and proved that the presence of acrylic acid units in amphiphatic macro-RAFT agents enabled an efficient formation of hybrid structures, while the presence of AMPS units, when combined with AA units, resulted in a better distribution of cerium oxide nanoclusters between latex particles.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
This work was sponsored by Solvay and the French Ministry of Education and Research (ANRT grant CIFRE N261/2008, and research grant ANR-2010-RMNP-005-05).