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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (2): 213-217. 上一篇    下一篇

研究论文

水分子凝胶聚集态的DSC和AFM研究

王理;黎坚;杨亚江   

  1. 华中科技大学化学系
  • 发布日期:2003-02-15

DSC and AFM Studies on Aggregate of Water Molecular Gels

Wang Li;Li Jian;Yang Yajiang   

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

PDF

818

被引次数

27 | 5

合成了一种新型凝胶因子，能在很低的浓度下使水发生凝胶化，形成水分子凝 胶。通过原子力显微镜(AFM)以及透射电子显微镜(TEM)对水分子凝胶的微观形态进 行了表征，表明凝胶因子可以在水中聚集、自组装成延伸的螺旋缠绕细纤维结构， 并且得出了纤维束的平均直径在100nm左右，平均孔径在100nm左右。利用示差扫描 量热(DSC)的数据，计算了水分子凝胶体系的平均孔径大小在50～100nm左右，与 AFM和TEM观测的结果较吻合，从而验证了DSC理论推导计算的正确性。同时还得到 了不同浓度的水分子凝胶的凝胶—溶胶相转变温度Tcs在55—72℃之间，而且随着 凝胶因子浓度的增加，水分子凝胶体系的平均孔径呈减小的趋势，凝胶—溶胶相转 变温度呈上升的趋势。

关键词: 凝胶, 聚集体, 示差扫描量热法, 原子力显微镜, 透射电子显微术, 相变, 水

A water molecular gel can be formed by the aggregation and self- assembly of gelator 4,4-bissteaiylarnide diphenyl ether at very low concentration. The microcosmic morphology, thin fiber-like structure, was observed from atomic force microscope (AFM) and TEM of the gels. The average fiber bundle diameter and the average hole diameter of the gel are both about 100 nm. By DSC measurements, the average hole diameter of the gel in different concentrations is calculated to be 50- 100 nm. The gel-sol temperature TQS of 55-72 °C is obtained. It is shown that the average hole diameter of the gel decreases and the gel- sol temperature rGS increases with the increase of the concentration of gelator

Key words: GEL, AGGREGALES, DSC, AFM, TEM, PHASE TRANSFORMATION, WATER

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