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Poly(ethylene glycol) Surface Coated Magnetic Particles

✍ Scribed by Christophe Flesch; Yves Unterfinger; Elodie Bourgeat-Lami; Etienne Duguet; Christelle Delaite; Philippe Dumas

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
171 KB
Volume
26
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Summary: A methacrylate‐functionalized poly(ethylene glycol) macromonomer was copolymerized at the surface of methacrylate‐derivatized maghemite nanoparticles. After silylation of the magnetic core with methacryloxypropyltrimethoxysilane, two grafting procedures based on either a direct copolymerization reaction in water or an inverse emulsion polymerization were compared. A direct copolymerization led to low polymer surface amounts, whereas an inverse emulsion process allowed nanocomposite particles containing up to 90 wt.‐% polymer to be obtained.

TEM picture of maghemite‐PEG hybrid particles.

magnified imageTEM picture of maghemite‐PEG hybrid particles.

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