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 journalArticle

54 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)408-413
Number of pages6
JournalLangmuir
Volume23
Issue number2
DOIs
Publication statusPublished - 16 Jan 2007
Externally publishedYes

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