Surface ATRP of hydrophilic monomers from ultrafine aqueous silica sols using anionic polyelectrolytic macroinitiators

Cong Duan Vo, Andreas Schmid, Steven P. Armes, Kenichi Sakai, Simon Biggs

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A convenient two-step route was developed to prepare new anionic ATRP macroinitiators from near-monodisperse poly(2-hydroxyethyl methacrylate) precursors by partial esterification with 2-bromoisobutyryl bromide, followed by esterification of the remaining hydroxyl groups using excess 2-sulfobenzoic acid cyclic anhydride. These new macroinitiators can be electrostatically adsorbed onto ultrafine cationic Ludox CL silica sols; subsequent surface polymerization of various hydrophilic monomers in aqueous solution at room temperature afforded a range of polymer-grafted ultrafine silica sols. The resulting sterically stabilized particles were characterized by dynamic light scattering, transmission electron microscopy, aqueous electrophoresis, FTIR spectroscopy, and elemental microanalyses. © 2007 American Chemical Society.
    Original languageEnglish
    Pages (from-to)408-413
    Number of pages5
    JournalLangmuir
    Volume23
    Issue number2
    DOIs
    Publication statusPublished - 16 Jan 2007

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