STUDY ON MISCIBILITY OF MOLECULES IN ORIENTED MOLECULAR ASSEMBLIES BY HIGH RESOLUTION CALORIMETER

高分辨率量热仪研究定向分子组装体中分子的相溶性

• 批准号: 05403014
• 负责人: MATSUBARA Akira
• 金额: $ 11.9万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05403014/
• 关键词: molecular assembly; high resolution calorimeter; enthalpy of mixing; micelle; enthalpy of adsorption

1.The enthalpy of mixing of water and tetraethylene glycol monooctyl ether (C8E4) was precisely measured as a function of concentration of surfactant and temperature by using the high accuracy isothermal titration calorimeter. The differential enthalpies of solution of monomer and micelle and the enthalpy of micelle formation were evaluated by applying the thermodynamic relations developed to the enthalpy of mixing measured. The dissolution of pure liquid C8E4 is exothernmic and the micelle formation is endothermic, respectively. It is shown that the partial molar enthalpy of water may afford an insight into the hydration in micellar state. It was also shown that there exists the difference in values between the enthalpy of micelle formation obtained directly from calorimetry and that indirectly from the temperature dependence of critical micelle concentration.2.The experimental method is now applied to the measurement of the enthalpy of mixing of mixed surfactant systems. Furthermore it was suggested that this calorimeter, because of its extremely high resolution, is applicable to measure directly the enthalpy of interface formation and adsorption of surfactant at the interface.

1.用高精度等温滴定量热计精确测定了水与四乙二醇单辛基醚（C8E4）的混合焓随表面活性剂浓度和温度的变化规律。将所建立的热力学关系应用于测定的混合焓，计算了单体与胶束溶液的微分焓和胶束形成焓。纯液体C8E4的溶解是放热的，胶束的形成是吸热的。结果表明，水的偏摩尔焓可以对胶束状态下的水化反应提供一个新的认识。结果还表明，直接由量热法得到的胶束形成焓值与间接由临界胶束浓度的温度依赖性得到的胶束形成焓值存在差异。该实验方法现已应用于混合表面活性剂体系的混合焓的测量。该量热计具有极高的分辨率，可以直接测量界面形成焓和表面活性剂在界面上的吸附焓。

项目成果

T.Takiue, M.Tomioka, N.Ikeda, A.Matsubara, M.Aratono, K.Motomura: "Miscibility of Sodium Dodecyl Sulfate and Sodium Decyl Sulfate in the Adsorbed Film and Micelle" Colloid & Polym.Sci.274(in press).

T.Takiue、M.Tomioka、N.Ikeda、A.Matsubara、M.Aratono、K.Motomura：“十二烷基硫酸钠和癸基硫酸钠在吸附膜和胶束中的混溶性”胶体

M.Aratono, M.Ikeguchi, T.Takiue, N.Ikeda, K.Motomura: "Thermodynamic Study on the Miscibility of Sodium Perfluorooctanoate and Sodium Dodecyl Sulfate in the Adsorbed Film and Micelle" J.Colloid Interface Sci.174. 156 (1995)

M.Aratono、M.Ikeguchi、T.Takiue、N.Ikeda、K.Motomura：“吸附膜和胶束中全氟辛酸钠和十二烷基硫酸钠混溶性的热力学研究”J.Colloid Interface Sci.174。

本村欣士: "コロイド科学II. 会合コロイドと薄膜" 日本化学会編 東京化学同人, 5 (1995)

本村欣二：《胶体科学 II.缔合胶体和薄膜》，日本化学会编，东京化学同人，5（1995）

荒殿誠: "コロイド科学II.会合コロイドと薄膜" 日本化学会編 東京化学同人, 25 (1995)

Makoto Aradono：《胶体科学 II.胶体与薄膜的关联》，日本化学会编，东京化学同人，25（1995）

荒殿 誠: "Thermodynamic study on the miscibility of sodium perfluorooctanoate and sodium dodecyl sulfate in the adsorbed film and micelle" Journal of Colloid and Interface Science. 174. 156-161 (1995)

Makoto Aradono：“吸附膜和胶束中全氟辛酸钠和十二烷基硫酸钠混溶性的热力学研究”胶体与界面科学杂志 174. 156-161 (1995)。