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| Fabrication of Nano-SiO2 Initiator by a Novel Room Temperature Esterification Method and In-situ Polymerization |
| QIANG Xiaohu, FENG Libang, WANG Shunhua |
| School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070 |
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Cite this article:
QIANG Xiaohu FENG Libang WANG Shunhua. Fabrication of Nano-SiO2 Initiator by a Novel Room Temperature Esterification Method and In-situ Polymerization. Chin J Mater Res, 2011, 25(1): 95-98.
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Abstract A novel method for grafting azo-groups onto the surface of SiO2 nanoparticles to prepare SiO2-initiator by the esterification reaction under the mild conditions, has been developed. The monomers as styrene or methyl methacrylate was polymerized using azo-group bounded SiO2 as an initiator, and then polystyrene or poly(methyl methacrylate) chains grow out of the surface of SiO2 nanoparticles. Results show that polymer grafted onto the surface of SiO2 nanoparticles accounts of ca. 45% (mass fraction)of SiO2. As a result, the average particle size increases from 80 nm to 100 nm upon the polymer grafting. Consequently, the core-shell composite particles with polymer on the outside and SiO2 in the core are obtained.
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Received: 08 July 2010
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| Fund: “Qing Lan” Talent Engineering Funds by Lanzhou Jiaotong University |
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