期刊
JOURNAL OF LUMINESCENCE
卷 131, 期 8, 页码 1701-1706出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2011.03.065
关键词
ZnO; Photoluminescence; Nanocomposites; Thermal decomposition
类别
资金
- National Natural Science Foundation of China [51073076, 50902067, 51003045]
- Natural Science Foundation of Jiangxi Province [2008GQH0046]
In this paper, a new and simple approach for in-situ preparation of transparent ZnO/poly (metyl methacrylate) (ZnO/PMMA) nanocomposite films was developed. Poly(methyl methacrylate)-co-poly(zinc methacrylate acetate) (PMMA-co-PZnMAAc) copolymer was synthesized via free-radical polymerization between methyl methacrylate (MMA) and zinc methacrylate acetate (ZnMAAc), where asymmetric ZnMAAc with only one terminal double bond (C=C) was applied to act as the precursor for ZnO nanocrystals and could avoid cross-link. Subsequently, transparent ZnO/PMMA nanocomposite films were obtained by in-situ thermal decomposition. Scanning electron microscope (SEM) image revealed that ZnO nanocrystals were homogeneously dispersed in PMMA matrix. With thermal decomposition time increasing, the absorption intensity in UV region and photoluminescence intensity of ZnO/PMMA nanocomposite films enhanced. However, the optical properties diminished when the thermal decomposition temperature increased. The TGA measurement displayed ZnO/PMMA nanocomposite films prepared by the in-situ synthesis method possessed better thermal stability compared with those prepared by the physical blending method and pristine PMMA films. (C) 2011 Elsevier B.V. All rights reserved.
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