期刊
APPLIED SURFACE SCIENCE
卷 357, 期 -, 页码 1619-1624出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.10.044
关键词
Fe3O4 nanoparticles; Precursor concentration; Poly(glycidyl methacrylate); Surface-initiated AGET ATRP; [PMDETA](0)/[CuBr2](0) ratio
类别
资金
- State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China [CMEMR2011-12]
- scientific research project of Guangxi Department of Science and Technology [201204LX065]
- Natural Science Foundation of Guangxi Province [2015GXNSFAA139022, 2014GXNSFFA118003]
- BAGUI scholar program [2014A001]
- Project of Talents Highland of Guangxi Province
Polymer brushes based on poly(glycidyl methacrylate) (PGMA) have been successfully grafted from the surface of silica coated iron oxide (Fe3O4@SiO2) nanoparticles via surface-initiated activators generated by electron transfer atom transfer radical polymerization (SI-AGET ATRP). The size of the nanoparticles could be adjusted from 7.3 to 9.6 nm by varying the precursor concentration of iron(III) acetylacetonate. The Fe3O4 nanoparticles possessed a highly crystalline structure, and the saturation magnetization of the as-prepared magnetite was strongly related to the particle size. Furthermore, the grafted PGMA content on the magnetic nanoparticles could be controlled by varying the ligand to transition metal ratio in a N,N,N',N '',N ''-pentamethyldiethylenetriamine (PMDETA)/CuBr2 catalyst system. The maximum grafted content was 23.1% at a ratio of [PMDETA]0(/)[CuBr2](0) = 2:1. (C) 2015 Elsevier B.V. All rights reserved.
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