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首页> 外文期刊>Journal of Oleo Science >Effects of Hydrophobic Chain Length on Temperature Dependence of Monolayer Behavior of Ester-type Tartaric Geminis
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Effects of Hydrophobic Chain Length on Temperature Dependence of Monolayer Behavior of Ester-type Tartaric Geminis

机译：疏水链长对酯型酒石双子星单层行为温度依赖性的影响

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摘要

Ester-type tartaric gemini amphiphiles bearing two carboxyl groups and two hydrophobic alkanoyl groups were prepared from L-tartaric acid, and the pressure-area (π-A) isotherms for a series of symmetric tartaric gemini amphiphiles were measured by the conventional film-balance technique. The effects of the length of the hydrophobic alkanoyl chains and of the subphase temperature (T_(sub)) on the n-A isotherms for these compounds were examined. As the length of the hydrophobic alkyl chain increased, a more tightly packed monolayer was formed at the air-water interface. The melting temperature (T_m) of the monolayer on the water surface was evaluated from the subphase temperature (T_(sub)) dependence of the monolayer static elasticity ε_s, based on a π-A isotherm. A clear relationship between T_m and hydrophobic carbon number (n) was observed for 2D monolayers of tartaric geminis on water surfaces, as well as for fatty acids and/or 3D solids.
机译：用L-酒石酸制备带有两个羧基和两个疏水链烷酰基的酯型酒石双亲物，通过常规的膜天平测量一系列对称的酒石双亲物的压力区（π-A）等温线。技术。研究了疏水链烷酰基链的长度和子相温度（T_（sub））对这些化合物的n-A等温线的影响。随着疏水性烷基链的长度增加，在空气-水界面处形成了更紧密堆积的单层。基于π-A等温线，根据单层静态弹性ε_s的子相温度（T_（sub））依赖性来评估水表面上单层的熔融温度（T_m）。对于水表面上的酒石双子星的2D单层，以及脂肪酸和/或3D固体，观察到T_m与疏水碳数（n）之间的明确关系。

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  • 来源
    《Journal of Oleo Science》 |2011年第2期|p.61-69|共9页
  • 作者

    Tokuzo Kawase; Isao Saito; Tatsuo Oida;

  • 作者单位

    Department of Chemistry and Materials Technology, Kyoto Institute of Technology (Hashigamicho 1, Matsugasaki, Sakyo-ku, Kyoto 606-8585, JAPAN);

    Department of Chemistry and Materials Technology, Kyoto Institute of Technology (Hashigamicho 1, Matsugasaki, Sakyo-ku, Kyoto 606-8585, JAPAN);

    Department of Chemistry and Materials Technology, Kyoto Institute of Technology (Hashigamicho 1, Matsugasaki, Sakyo-ku, Kyoto 606-8585, JAPAN);

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    monolayer formation; tartaric gemini; temperature dependency; melting temperature; static elasticity;

    机译：单层形成;酒石双子座温度依赖性熔点温度;静态弹性;

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