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Vol. 27 No. 8 (2015): Vol 27 Issue 8

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Preparation and Characterization of Two Component Transparent Zinc Oxide/Silicone Nanocomposites for Power Light Emitting Diodes Encapsulant

https://doi.org/10.14233/ajchem.2015.18282
Xiaoyong Hu
College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P.R. China
Zhiyuan Lin
College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P.R. China
Youming Zheng
College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, P.R. China
Yuqing Xu
College of Materials Science and Engineering, Guilin University of Technology, Liulin 541004, Guangxi, P.R. China

Corresponding Author(s) : Xiaoyong Hu

hxypym@126.com

Asian Journal of Chemistry, Vol. 27 No. 8 (2015): Vol 27 Issue 8

Abstract

Novel transparent zinc oxide (ZnO)/silicone nanocomposites for power light-emitting diodes packaging with excellent properties including a high transparency, UV-shielding efficiency and thermal properties were successfully synthesized through a three-step reaction routes: (i) ZnO precursor was prepared via homogeneous precipitation method and ZnO nanpoparticles were then obtained by calcination of the precursor at different temperature; (ii) the graft polymerization of surface fractionalized ZnO (m-ZnO) nanoparticles in hydrogen-containing poly(methysiloxane) were investigated and then mixed with terminal-vinyl poly(methylsiloxane) and MQ silixone resin as component B; (iii) the hydrosilylation chemistry of terminal-vinyl polymethysiloxane (as component A) in (ii) with MQ silicone resin and platinum catalysts. The structural properties of the as-prepared ZnO nanoparticles were studied and the nanocomposites were characterized through Fourier transform infrared, themogravimetry and Scanning electron microscope. The optical properties of nanocomposites namely visible light transparency and UV-light shielding efficiency were studied using an ultraviolet-visible spectrophotometer. The results indicated that functionalizations with A151 greatly improved the dispersion of ZnO in silicone due to their high chelating capacities with ZnO and the refractive index of m-ZnO in nanocomposites were changed by chemical grafting. The optical properties of the as-obtained nanocomposites were shown to depend on ZnO particle size and the nanocomposites containing 0.06 % in weight of functionalized ZnO nanoparticels with an average particle size of 96.01 nm after calcination at 400 °C possessed excellent visible-light transparency and high UV-light shielding deficiency. Moreover, the thermal properties of nanocomposites was enhanced with m-ZnO introduced and met the requirements of high-performance electronic packaging for high-power light-emitting diodes encapsulant.

Keywords

ZnO Nanoparticles Nanocomposites Optical properties Thermal properties
Hu, X., Lin, Z., Zheng, Y., & Xu, Y. (2015). Preparation and Characterization of Two Component Transparent Zinc Oxide/Silicone Nanocomposites for Power Light Emitting Diodes Encapsulant. Asian Journal of Chemistry, 27(8), 2905–2910. https://doi.org/10.14233/ajchem.2015.18282
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