Solution Properties of Dissymmetric Sulfonate-type Anionic Gemini Surfactants
-
- Yoshimura Tomokazu
- Department of Chemistry, Faculty of Science, Nara Women’s University
-
- Akiba Kazuki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science
この論文をさがす
抄録
Dissymmetric and symmetric anionic gemini surfactants, N-alkyl-N’-alkyl-N,N’dipropanesulfonylethylenediamine (CmCnSul, where m and n represent alkyl chain lengths of m-n = 4-16, 6-14, 8-12, 10-10, and 12-12), were synthesized by two- or three-step reactions. Their physicochemical properties were characterized by equilibrium surface tension measurements, steady-state fluorescence spectroscopy of pyrene, and dynamic light scattering. The critical micelle concentration (CMC) of the dissymmetric surfactants C4C16Sul, C6C14Sul, and C8C12Sul was slightly lower than that of the symmetric surfactant C10C10Sul. The occupied area per molecule (A) of C8C12Sul was smaller than that of C10C10Sul, indicating that C8C12Sul has a high surface activity. However, the increase in the degree of dissymmetry from C8C12Sul to C6C14Sul and then to C4C16Sul resulted in high surface tension and large A. Based on the surface tension, the standard free energies of micellization (∆G°mic) and adsorption (∆G°ads), the efficiency of surface adsorption (pC20), and the effectiveness of surface adsorption (CMC/C20) were obtained. These parameters suggested that C8C12Sul formed micelles more readily than the other surfactants. The properties determined from the surface tension indicated that C8C12Sul’s ability is intermediate between those of C10C10Sul and C12C12Sul. The pyrene fluorescence and dynamic light scattering results revealed that the micelle size depends on the longer of the two alkyl chains in dissymmetric surfactants.
収録刊行物
-
- Journal of Oleo Science
-
Journal of Oleo Science 65 (2), 135-141, 2016
公益社団法人 日本油化学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204092421120
-
- NII論文ID
- 130005121696
-
- NII書誌ID
- AA11503337
-
- ISSN
- 13473352
- 13458957
-
- NDL書誌ID
- 027060482
-
- PubMed
- 26782304
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可