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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (7): 1147-1150.    下一篇

研究论文

Bola型阴离子表面活性剂与溴化十二烷基三乙铵混合体系的表面性质与聚集行为

阎云;黄建滨;李子臣;赵小莉;马季铭   

  1. 北京大学化学与分子工程学院.北京(100871)
  • 发布日期:2002-07-15

Surface Property and Aggregation Behavior of Anionic Bolaform Surfactant/C_(12)Et_3 Mixed System

Yan Yun;Huan Jianbin;Li Zichen;Zhao Xiaoli;Ma Jiming   

  1. College of Chemistry and Molecular Engineering, Peking University. Beijing(100871)
  • Published:2002-07-15

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420

被引次数

59 | 10

研究了具有简单结构的bola型阴离子表面活性剂二十酸二钠（C_(20)Na_2)与 阳离子型普通表面活性剂溴化十二烷基三乙铵（C_(12)Et_3）混合体系的表面性质 ，发现混合体系的cmc和γ_(cmc)比C_(12)Et_3单一体系未有显著降低。以负染色 ，FF-TEM，动态光散射（DLS）及粘度方法研究了混合体系的聚集行为，发现混合 体系中同时形成球形囊泡和管状聚集体，提出了产生这种聚集行为的机制。

关键词: 表面活性剂, 聚集体, 季铵, 光散射, 粘度

The surface properties in the mixed system of simply structured bolaform amphiphile sodium eicosanedioate (C_(20)Na_2) and cationic surfactant dodecyl triethylammonium bromide (C_(12)Et_3) were studied. Compared with the C_(12)Et3 single system, it was found that cmc and γ _(cmc) in the mixed system did not decrease significantly. Negative stained and FF-TEM, dynamic laser light scattering (DLS) and viscosity methods were used to investigate the aggregation behaviors in the mixed system. Global vesicles and tube-like aggregates were formed in the mixed solution and the mechanism of aggregation was proposed.

Key words: SURFACTANTS, AGGREGALES, QUATERNARY AMMONIUM COMPOUNDS, LIGHT SCATTERING, VISCOSITY

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