Abstract
In this contribution, we report the facile preparation of vinylimidazolium-typed poly(ionic liquid) (PIL) latexes and nanoparticles via dispersion polymerization of ionic liquid monomers in aqueous solutions. A homologous series of vinylimidazolium-typed ionic liquid monomers with different alkyl tail length (C8−C18) were synthesized via quaternization of 1-vinylimidazole with corresponding n-alkyl bromides. Dispersion polymerization of these monomers was conducted at a monomer concentration of 50 g/L in aqueous solution at 70 °C without addition of further stabilizers. For ionic liquid monomers with sufficiently long alkyl chains (≥C12), PILs nanoparticles of 20−40 nm in diameter were found, which were self-stabilizing in aqueous media. In the same procedure, preparation of cross-linked PIL nanoparticles was performed in the presence of 10 mol % of divinylimidazolium-based cross-linker. The as-synthesized cross-linked PIL nanoparticles could be transferred into organic solvents, such as polar DMF, and no...
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