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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (14): 1659-1662. 上一篇    下一篇

研究论文

基于均苯三甲酸与对羟基吡啶的超分子水凝胶

王可答a 刘利军a 唐黎明*,b

  

  1. (a绥化学院化学与制药工程系 绥化 152061)
    (b清华大学化工系 教育部先进材料重点实验室 北京 100084)

  • 投稿日期:2008-11-04 修回日期:2009-01-14 发布日期:2009-07-28
  • 通讯作者: 唐黎明

Supramolecular Hydrogels Based on 1,3,5-Benzenetricarboxylic Acid and 4-Hydroxypyridine

Wang, Keda a Liu, Lijun a Tang, Liming *,b

  

  1. (a Department of Chemistry and Pharmaceutical Engineering, Suihua University, Suihua 152061)
    (b Laboratory of Advanced Materials, Department of Chemical Engineering, Tsinghua University, Beijing 100084)

  • Received:2008-11-04 Revised:2009-01-14 Published:2009-07-28
  • Contact: TANG Li-Ming

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1495

被引次数

4

以均苯三甲酸和对羟基吡啶为原料, 采用简便方法合成了一种新的凝胶因子, 并采用1H NMR、IR和元素分析确认其结构. 红外光谱中2849和1894 cm－1处出峰证明羧基与吡啶基间形成了氢键. 在凝胶化过程中, 凝胶因子可自组装形成纤维状网络结构. 随着凝胶因子浓度的增加, 纤维搭接逐渐致密, 凝胶网络密度逐渐增大, 可冻结水含量逐渐增加. 因此, 通过改变凝胶因子浓度可有效控制凝胶的结构及性能. 该凝胶因子在较低浓度下形成的超分子水凝胶在100 ℃下也能够稳定存在.

关键词: 超分子水凝胶, 凝胶因子, 氢键, 结构

A new gelator was synthesized from 1,3,5-benzenetricarboxylic acid (BTA) and 4-hydroxy- pyridine (PHP) by a simple procedure and structurally confirmed by 1H NMR, IR and elemental analysis. The characteristic peaks of 2489 and 1894 cm－1 in the IR spectrum indicated the formation of hydrogen bond between the carboxylic acid and pyridyl groups. The gelator molecules assembled into aggregated fibers during the gelating process. On increasing the gelator concentration, the fiber size, fiber network density and freezing water content increased accordingly. Therefore the gel structures could be controlled by changing the gelator concentration. The supramolecular hydrogels formed at a gelator concentration higher than 2.3 wt% kept stable even under 100 ℃.

Key words: supramolecular hydrogel, gelator, hydrogen bond, structure