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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (2): 171-174. 上一篇    下一篇

研究论文

分子凝胶中可聚合凝胶因子的聚集态及分形结构研究

黎坚;王理;张雪勤;杨亚江   

  1. 华中科技大学化学系
  • 发布日期:2003-02-15

The Aggregating State and Fractal Structure of Polymerizable Gelators in Molecular Gels

Li Jian;Wang Li;Zhang Xueqin;Yang Yajiang   

  1. Department of Chemistry,Huazhong University of Science & Technology
  • Published:2003-02-15

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560

被引次数

23 | 2

利用X射线衍射(XRD)及原子力显微镜(AFM)研究了可聚合凝胶因子4，4′—二 (α-甲基丙烯酰氧基—1，3—亚乙氧基碳基丙酰氨基)二苯甲烷(BMDM)在二苯醚凝 胶中的聚集态及分形结构。研究结果表明，凝胶纤维束是由大量细长的薄带状的单 元纤维有序堆积成的，单元纤维的宽度约为3nm，厚度为0．1—0．2nm；凝胶因子 聚集体则是一种规则的片层结构，具有自相似性和分形特征。利用分形理论中的 Sandbox法计算结果也表明分子凝胶具有分形特征，计算得分形维数D＝1．853。

关键词: 凝胶, 原子力显微镜, 聚集体, X射线衍射分析, 二苯基甲烷 P, 分形维数

The aggregating state and fractal structure of the polymerizable gelator, 4,4'-bis(a-methylacryloyloxy-l ,3- ethyleneoxycarbonylpropionamido) diphenyl methane (BMDM) , in diphenyl ether was investigated with X-ray powder diffraction (XRD) and atomic force microscopy (AFM) . It is revealed that the fibril bundles consist of well-ordered stacks of ribbons or sheets. The width of a ribbon is 3 nm and its thickness is 0.1-0.2 nm. It is also shown that the aggregates of gelators have a well-ordered lamellar structure, self-comparability and typical fractal characteristic. With the help of fractal theory and C++ program, fractal dimension D of the fractal structure can be calculated to be D = 1.8-1.9 through Sandbox methods.

Key words: GEL, AFM, AGGREGALES, XRD, DIPHENYLMETHANE P, FRACTAL GEOMETRY

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