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Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction

Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques, UMR 7195, 4 place Jussieu - cc51 75252 Paris cedex 05, France
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Appl. Sci. 2012, 2(2), 485-495; https://doi.org/10.3390/app2020485
Received: 16 March 2012 / Revised: 7 May 2012 / Accepted: 21 May 2012 / Published: 29 May 2012
(This article belongs to the Special Issue Magnetic Nanoparticles: Synthesis, Properties and Applications)
In this article, we present an efficient synthesis pathway of polydimethylsiloxane (PDMS) coated magnetic nanoparticles from hydrophilic polyacrylate coated ferrofluids (NPPAA). A block copolymer based on polydimethylsiloxane is selected for its propensity to interact with the carboxylate functions on the NPPAA. The interaction is due to negative charges on NPPAA and positive ones on the amphiphilic copolymer. The synthesis is achieved by interfacial interaction, simplifying the purification of the PDMS-coated nanoparticles (NPPDMS) from subproducts such as ions and water. NPPDMS are well dispersed in hydrophobic solvents (toluene, diethyl ether) and can then be embedded into a curable PDMS polymer. View Full-Text
Keywords: magnetic nanoparticle; PDMS; amphiphilic copolymer; electrostatic complexation; polydimethylsiloxane composite; aminopropylsiloxane magnetic nanoparticle; PDMS; amphiphilic copolymer; electrostatic complexation; polydimethylsiloxane composite; aminopropylsiloxane
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Sötebier, C.; Michel, A.; Fresnais, J. Polydimethylsiloxane (PDMS) Coating onto Magnetic Nanoparticles Induced by Attractive Electrostatic Interaction. Appl. Sci. 2012, 2, 485-495.

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