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Anchor Wrapping,"of Polymer up Nanometer-sized TiO_2

WANG Shi-Xing;WANG Ming-Tat;LEI Yong;LI Guang-Hat;ZHANG Li-De(Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China)  
TiO_2/Poly(styrene maleic anhydride) nanocomposites were synthesized in situ viamulti-component solution method. It was found that the composites existed in the formation ofcovalent bonding between TiO_2 and polymer by infrared spectra. The systematical morphologychange of TiO_2 in the composites with different reaction conditions was observed through transmission electron microscope. Based on the mechanism of " anchor wrapping ", the nanocompositeswere in the form of three-dimensional net with the separated nano-crystalline TiO2 micro-phasesinside, and the aggregation of TiO2 grains was successfully inhibitted. The anatase phase of TiO_2was proved by X-Ray diffraction.
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