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Synthesis and Characterization of TiO2/ PSt/PVP Multilayer Core-Shell Hybrid Microspheres

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Abstract:

Multiplayer core-shell TiO2/PSt/PVP hybrid microspheres were successfully synthesized by the copolymerization of vinylpyrrolidone in the solution of ethyl acetate with TiO2/PSt core-shell hybrid microspheres which were formed through the encapsulation of KH570-g-TiO2 sol particles with styrene, while the active KH570-g-TiO2 sol particles were prepared by the hydrolysis condensation of KH-570 with tetrabutyl titanate. Characterization technologies of FT-IR and TGA were applied to investigate the structure and the thermal stability of the product. The results showed that the hydroxyl groups from the hydrolysis of KH-570 condensed with the surface hydroxyl groups of TiO2, as well as PSt and PVP were grafted successively onto the surface of KH570-g-TiO2 sol particles. The thermal decomposition temperature of TiO2/PSt/PVP was higher than TiO2/PSt, which also indicated that the obtained product was the final objective product.

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Periodical:

Advanced Materials Research (Volumes 512-515)

Pages:

2443-2447

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.512-515.2443

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Online since:

May 2012

Authors:

Li Ying Guo

Keywords:

Graft Polymerization, Hybrid Microspheres, Multilayer Core-Shell, Nano-TiO2

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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