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Thermoresponsive PNIPAM/Silica Nanoparticles by Direct Photopolymerization in Aqueous Media

  • This article presents a simple and facile method to fabricate thermoresponsive polymer-grafted silica particles by direct surface-initiated photopolymerization of N-isopropylacrylamide (NIPAM). This method is based on silica particles bearing thiol functionalities, which are transformed into thiyl radicals by irradiation with UV light to initiate the polymerization of NIPAM in aqueous media at room temperature. The photopolymerization of NIPAM could be applied to smaller thiol-functionalized particles (approximate to 48 nm) as well as to larger particles (approximate to 692 nm). Hollow poly(NIPAM) capsules could be formed after etching away the silica cores from the composite particles. It is possible to produce tailor-made composite particles or capsules for particular applications by extending this approach to other vinyl monomers. (c) 2015 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 2015, 53, 1260-1267

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Author:Hua Zou, Helmut SchlaadORCiDGND
ISSN:0887-624X (print)
ISSN:1099-0518 (online)
Parent Title (English):Journal of polymer science : A, Polymer chemistry
Place of publication:Hoboken
Document Type:Article
Year of first Publication:2015
Year of Completion:2015
Release Date:2017/03/27
Tag:nanocomposites; nanoparticles; photopolymerization; silica nanoparticles; surface-initiated photopolymerization; thermoresponsive; thiol
First Page:1260
Last Page:1267
Funder:Max Planck Society
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert