含芳环的可聚合阳离子型Hydrotrope的自缔合行为和助溶性能

doi:10.7517/j.issn.1674-0475.2013.04.005

影像科学与光化学 ›› 2013, Vol. 31 ›› Issue (4): 286-294.DOI: 10.7517/j.issn.1674-0475.2013.04.005

含芳环的可聚合阳离子型Hydrotrope的自缔合行为和助溶性能

沈桂芝^1,2, 张玉玺¹, 吴飞鹏¹, 王尔鑑¹

1. 中国科学院理化技术研究所, 北京 100190;
2. 中国科学院大学, 北京 100049

收稿日期:2013-03-11 修回日期:2013-04-09 出版日期:2013-07-15 发布日期:2013-07-15
通讯作者: 吴飞鹏,E-mail:fpwu@mail.ipc.ac.cn.
作者简介:沈桂芝(1986- ),女,主要从事水溶性功能聚合物材料的研究

Polymerizable Cationic Hydrotrope with Aromatic Structure：Self-assembly Behavior and Solubilization

SHEN Gui-zhi^1,2, ZHANG Yu-xi¹, WU Fei-peng¹, WANG Er-jian¹

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2013-03-11 Revised:2013-04-09 Online:2013-07-15 Published:2013-07-15

摘要/Abstract

摘要：

采用尼罗红(Nile red)染料为探针,利用吸收和发射光谱研究了具有不同烷芳基结构的可聚合阳离子型Hydrotropes(PCHs)的溶液性质,结果表明其在水溶液中易发生自缔合行为并具有两个阈值浓度:分子开始自缔合的临界浓度(CAC)(10^-1—10^-2 mol/L),开始大幅度提高助溶作用的最小助溶浓度(MHC)(>10^-1 mol/L),两阈值浓度均随化合物分子结构中的疏水基团尺寸的增大而减小.两亲化合物聚集体的微环境极性测定的结果显示,其极性比表面活性剂胶束高,并且随着化合物浓度的增大不断下降,表明形成的聚集体结构比较疏松,且其分子堆砌密度随聚集体的增大而逐步升高.此外,通过自由基聚合得到相应的两亲聚合物仍保留Hydrotrope原有的性能,并具有更显著的助溶作用.

关键词: 阳离子助水溶剂, 助溶作用, 自缔合行为, 可聚合性, 探针技术

Abstract:

A series of functional polymerizable cationic hydrotropes(PCHs) with different alkyl aromatic hydrophobic structures were studied. The solubilization properties and assembly behaviors were examined by absorption and emission spectra using Nile Red dye as a multi-functional probe. The result showed that there present two concentration thresholds: the critical association concentration (CAC) (10^-1—10^-2 mol/L) and the minimal hydrotropic concentration (MHC) (>10^-1 mol/L). Both of them decrease obviously with increasing dimension of hydrophobic structure. The microenvironment polarities of aggregates determined have a relatively high value compared with that for surfactant micelles, and continuously decreased with concentration suggesting formation of loose aggregated structure whose molecular stack density increase gradually with aggregate growth. In addition, hydrotropic polymers of this type obtained by radical polymerization maintained the original hydrotropic properties with more effective solubilization ablitiy.

Key words: cationic hydrotropes, solubilization, self-assemble, polymerizable, probe technique

中图分类号:

沈桂芝, 张玉玺, 吴飞鹏, 王尔鑑. 含芳环的可聚合阳离子型Hydrotrope的自缔合行为和助溶性能[J]. 影像科学与光化学, 2013, 31(4): 286-294.

SHEN Gui-zhi, ZHANG Yu-xi, WU Fei-peng, WANG Er-jian. Polymerizable Cationic Hydrotrope with Aromatic Structure：Self-assembly Behavior and Solubilization[J]. Imaging Science and Photochemistry, 2013, 31(4): 286-294.

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含芳环的可聚合阳离子型Hydrotrope的自缔合行为和助溶性能

Polymerizable Cationic Hydrotrope with Aromatic Structure：Self-assembly Behavior and Solubilization

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