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

用朗缪尔法和电极法测定了四种不同烷基链(M)的烷基全氟己酸铵在水和4.4M氯化钠溶液中的表面压力(Pi)和表面电位(DELTAV)-面积(A)等温线。某些对数氢氟短链盐的pi-A曲线显示出三个相变点。从表面电势和表观摩尔量来看，第一个是从膨胀相到凝聚相的转变，第二个是从凝聚相到另一个凝聚相的转变，第三个是从后一个相到另一个凝聚相的转变。相变压力pi^&lt；eq&gt；随碳氢阳离子链长的变化而明显变化。Pi-A和DELTAV-A等温线可能表明烷基全氟己酸铵的全氟碳链和碳氢链与前者在底物中的浸渍对齐。…更重要的是，表面电位行为是完全积极的：目前碳氢化合物和全氟碳的组合是关键。这是由于反离子的长全氟碳链由于其电负性氟原子而导致单分子膜压缩的表面电势负变化的事实。离子碳氢表面活性剂具有氢碳对离子，这种负面变化是不能预期的。为了更广泛地了解碳氢化合物与碳氢化合物在空气/水界面上的二维分子相互作用，我们研究了碳氢酸(HC14)与五种碳氟酸(FCN；n=10、12、14、16、18)在pH值为1.0的底物上的单层行为。混合单层的数据根据可加性规则进行了分析。从二维相图的分类来看，我们的相图可以分为三种类型。第一种是正共沸型；十四酸与全氟十二酸和全氟碘十酸的组合似乎彼此相容。第二种是完全不相容的类型；全氟十四酸和十四酸的组合。第三种可能是共晶型，即HC14与FC16和FC18的组合；它们在膨胀状态下是相容的，但在凝聚状态下是不相容的。此外，构建的平均分子面积、表面偶极矩和相图的数据使我们能够估计各酸在混合单层状态下的分子取向。较少

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）。