无机材料学报

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纳米TiO2的高分子锚定位包覆

王世兴, 王命泰, 雷勇, 李广海, 张立德   

  1. 中国科学院团体物理研究所, 合肥 230031
  • 收稿日期:1999-04-09 修回日期:1999-04-24 出版日期:2000-02-20 网络出版日期:2000-02-20

Anchor Wrapping of Polymer up Nanometer-sized TiO2

WANG Shi-Xing, WANG Ming-Tat, LEI Yong, LI Guang-Hat, ZHANG Li-De   

  1. Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031; China
  • Received:1999-04-09 Revised:1999-04-24 Published:2000-02-20 Online:2000-02-20

摘要: 通过多组分溶液的原位合成方法,成功地制备了TiO/聚苯乙烯-马来酸酐(PSMA)纳米复合材料.红外普图(IR)分析了这种材料的化学构成,证明纳米TiO与高分子是以共价键的形式存在.随着反应条件的改变,透射电镜(TEM)观察到了纳米TiO在复合物中有规律的形貌变化.综合实验结果,提出高分子“锚定位”包覆的作用模型,形象地说明了这种材料以三维网络、纳米晶TiO微相分离的形式存在,同时TiO颗粒的团聚几率在相当大程度上得以降低.结合X射线衍射,还确定出了复合物中纳米TiO的锐钛矿型结构.

关键词: 共价键, “锚定位”包覆, TiO2锐钛矿相

Abstract: TiO2/ Poly(styrene maleic anhydride) nanocomposites were synthesized In situ via multi-component solution method. It was found that the
composites existed in the formation of covalent bonding between TiO2 and polymer by infrared spectra. The systematical morphology change of TiO2 in the composites with different reaction conditions was observed through transmission electron microscope. Based on the mechanism of “anchor wrapping”, the nanocomposites were in the form of three-dimensional net with the separated nano-crystalline TiO2 micro-phases inside, and the aggregation of TiO2 grains was successfully inhibitted. The anatase phase of TiO2 was proved by X-Ray diffraction.

Key words: covalent bonding, “anchor” wrapping, TiO2 anatase phase

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