Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 8, Pages 2490-2495Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2009.10.093
Keywords
Surface modification; Atom-transfer radical polymerization (ATRP); Cu-catalyzed Huisgen [3+2] cycloaddition; Chain-end functionalization
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Funding
- Ankang University Science Foundation [2007AKXY019]
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A versatile method was developed for the chain-end functionalization of the grafted polymer chains for surface modi. cation of nanoparticles with functionalized groups through a combination of surface-initiated atom-transfer radical polymerization (ATRP) and Huisgen [3 + 2] cycloaddition. First, the surface of SiO2 nanoparticles was modified with poly(methyl methacrylate) (PMMA) brushes via the grafting from'' approach. The terminal bromides of PMMA-grafted SiO2 nanoparticles were then transformed into an azide function by nucleophilic substitution. These azido-terminated PMMA brushes on the nanoparticle surface were reacted with alkyne-terminated functional end group via Huisgen [3 + 2] cycloaddition. FTIR and H-1 NMR spectra indicated quantitative transformation of the chain ends of PMMA brushes onto SiO2 nanoparticles into the desired functional group. And, the dispersibility of the end-functional polymer-grafted SiO2 nanoparticles was investigated with a transmission electron microscope (TEM). (C) 2009 Elsevier B. V. All rights reserved.
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