양쪽성 계면활성제의 유도체 합성 및 계면성에 관한 연구 ( 제6보 ) - 양쪽성 계면활성제의 미셀 형성에 대한 열역학적 고찰 = Syntheses and Surface Active Properties of Amphoteric Surfactant Derivatives (6) - Thermodynamics of Micellization of Amphoteric Surfactant Derivatives -

다국어 초록 (Multilingual Abstract)

The critical micelle concentrations(cmc) was studied on nine kinds of amphoteric surfactants; three kinds of carboxylated amides, three kinds of sulfated or sulfonated imidazoline and three kinds of sulfonated amides at 15 to 45℃ range. The change of free energy about micelle formation can be converted into the change of enthalpy and entropy. The standard free energy change ΔG˚m of micellization was estimated from the cmc, by treating the formation of micelles as thermodynamics; the determination of the variation of cmc the enables ΔG˚m to be split into the correspondingΔH˚m and ΔS˚m. These results were examined by making a comparison between this results and the previously known values. The process of micelle formation obtained the result that perfactly was attributed to interface effect and the exothermic reaction which ΔH˚m values were －1.2∼－2.3Kcal/㏖ was not related with temperature at 15 to 45℃ range. The interface effect was decresed with the hydrophilic increase of the amphoteric surfatants. The process of micelle formation was proceeded spontaneously at 15 to 45℃ range and entrophy increased with consisting of micelle formation to control entrophy process.