The Study on Two Dimensional Dynamic Process of Ionic Surfactants Composed of Fluorocarbon and Hydrocarbon Ions

氟碳烃离子组成的离子表面活性剂二维动态过程研究

• 批准号: 07672318
• 负责人: SHIBATA Osamu
• 金额: $ 1.28万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07672318/
• 关键词: ionic surfactants; alkylammonium perfluorohexanoates; Langmuir film (monolayr); two-dimensional phase diagram; phase transition pressure; pi-A isotherm; DELTAV-A isotherm; perfluorocarboxylic acid

Surface pressure (pi) - and surface potential (DELTAV) - area (A) isotherms were obtained for monolayrs of alkylammonium perfluorohexanoates of four different alkyl chains (m) on water and 4.4 M NaCl solutions as a function of molecular area of various temperatures by the Langmuir and the ionizing electrode methods. Some pi-A curves of these logn-hydro-short-fluoro chain salt showed three phase transition points. Judging from the surface potential and the apparent molar quantity, the first was assigned to the transition from the expanded phase to the condensed phase, the second from the condensed phase to another condensed phase, and the third from the latter phase to one other condensed phase. The phase transition pressure pi^<eq> explicitly changes with varying chain lengths of the hydro-carbon cation. The pi-A and DELTAV-A isotherms might suggest that the perfluorocarbon and hydrocarbon chains of alkylammonium perfluorohexanoates are aligned with the former dipping in the substrate. … More The surface potential behavior is totally positive : the present combinations of hydrocarbon and perfluorocarbon are critical. This originates from the fact that the long perfluorocarbon chain of the counterion contributes a negative change in surface potential on mono-molecular film compression owing to its electronegative fluorine atoms. This negative change cannot be expected with ionic hydrocarbon surfactants having a hydro-carbon counterion. Surfactants composed of both hydrocarbon and fluorocarbon portions should be investigated in more detail for the development of functional amphiphiles.To obtain more generalized information concerning the two dimensional molecular interaction between fluorocarbon and hydrocarbon chains at the air/water interface, we investigated the monolayr behavior of a hydrocarbon acid, tetradecanoic acid (HC14), with five fluorocarbon fatty acids (FCn ; n=10,12,14,16,18) on a substrate of pH1.0 as a function of compositions. Data for the mixed monolayrs were analyzed in terms of the additivity rule. Judging from classification of two-dimensional phase diagrams, our phase diagrams might be classified into three types. The first is a positive azeotrope type ; the combinations of tetradecanoic acid with perfluorodecanoic acid and with perfluorododecanoic acid seem miscible with each other. The second is a completely immiscible type ; the combination of perfluorotetradecanoic acid and tetradecanoic acid. The third might be a eutectic type, to which the combinations of HC14 with FC16 and with FC18 are assigned ; they are miscible in the expanded state but immiscible in the condensed state. Furthermore, the data on the mean molecular area, the surface dipole moment, and the phase diagrams constructed enabled us to estimate themolecular orientation of the respective acids in the mixed monolayr state. Less

用Langmuir和离子化电极法测定了四种不同烷基链（m）的全氟己酸烷基铵在水和4.4 M NaCl溶液中的单分子膜的表面压（pi）-和表面势（Δ V）-面积（A）等温线，它们是不同温度下分子面积的函数。这些对数氢短氟链盐的π-A曲线显示出三个相变点。根据表面电位和表观摩尔量的变化，第一个过程是膨胀相向凝聚相的转变，第二个过程是凝聚相向另一个凝聚相的转变，第三个过程是凝聚相向另一个凝聚相的转变。相变压力Pl ^<eq>随着烃阳离子的链长变化而明显变化。pi-A和DELTAV-A等温线可能表明全氟己酸烷基铵的全氟碳链和烃链与浸入基底中的全氟碳链对齐。 ...更多信息 表面电位行为是完全正的：目前的碳氢化合物和全氟化碳的组合是关键的。这是由于在单分子膜压缩过程中，由于其氟原子的电负性，其长的全氟化碳链对表面电位的负变化有贡献。这种负变化不能用具有烃-烃平衡物的离子烃表面活性剂来预期。为了更全面地了解氟碳分子与烃链在空气/水界面上的二维分子相互作用，我们研究了一种碳氢酸--十四烷酸（HC 14）与五种氟碳脂肪酸的单分子层行为（FCn ; n= 10，12，14，16，18）在pH1.0的底物上作为组成的函数。混合单层的数据进行了分析的加和性规则。从二维相图的分类来看，我们的相图可以分为三种类型。第一种是正互变异构体类型;十四烷酸与全氟癸酸和全氟十二烷酸的组合似乎彼此混溶。第二种是完全不混溶的类型;全氟十四烷酸和十四烷酸的组合。第三种可能是低共熔类型，HC 14与FC 16和FC 18的组合被分配给它;它们在膨胀状态下是可混溶的，但在冷凝状态下是不可混溶的。此外，平均分子面积，表面偶极矩和相图的数据，使我们能够估计themolecular取向的混合单层状态下的各个酸。少

项目成果

Yoshikiyo MOROI,Tomo MORISUE,Midori TAKE-UCHI and Osamu SHIBATA: "Solubilization of Arenes and n-Alkylbenzenes into Ionic Surfactant Micelles" Colloids Surfaces. A 109. 201-208 (1996)

Yoshikiyo MOROI、Tomo MORISUE、Midori TAKE-UCHI 和 Osamu Shibata：“将芳烃和正烷基苯溶解到离子表面活性剂胶束中”胶体表面。

Gohsuke SUGIHARA: "A Monolayer Study on Mixed Systems of Different Conjugated Bile Acids on 5M Aqueous NaCl Solution at pH 1.2 and 25℃" Colloids and Surfaces, B. (in press). (1996)

Gohsuke SUGIHARA：“在 pH 1.2 和 25℃ 的 5M 氯化钠水溶液中对不同共轭胆汁酸混合体系的单层研究”胶体和表面，B.（出版中）。

Gohsuke SUGIHARA: "Bile Acids cannot mix with Cholesterol in Two-dimensional Phases (monolayer) formed on the substrate of 5M Aqueous NaCl Solution at pH 1.2 and 25°C." Colloids and Surfaces. B6. 81-89 (1996)

Gohsuke SUGIHARA：“胆汁酸不能与在 pH 1.2 和 25°C 的 5M 氯化钠水溶液基质上形成的二维相（单层）中的胆固醇混合。”（胶体和表面 81-89）。

Shigekazu YAMAMOTO: "A Monolayer Study on Mixed Systems of a Phosphlipid (DPPC) with Fluorocarbon Fatty Acids and with Hydrocarbon Fatty Acids" Progress in Anesthetic Mechanism. 3. 25-30 (1995)

Shigekazu YAMAMOTO：“磷脂（DPPC）与氟碳脂肪酸和碳氢脂肪酸混合体系的单层研究”麻醉机制进展。

Osamu SHIBATA: "Monolayer Properties of Long-Chain Alkylammonium Perfluorohexanoates on the Conocentrated Sodium Chloride Solution" J.Colloid Interface Sci.(in press). (1996)

Osamu Shibata：“长链烷基铵全氟己酸盐在浓氯化钠溶液上的单层特性”J.Colloid Interface Sci.（出版中）。