Preparation and Surface-Active Properties of Complexanetype Trimeric Surfactants from Tris(2-aminoethyl)amine
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概要
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Complexane-type trimeric surfactants of tris(1-carboxyalkyl-2-aminoethyl)amine (3Rntata; n means alkyl chain length, n=6-14) having three alkyl chains and three hydrophilic groups were prepared by the reaction of tris(2-aminoethyl)amine and 2-bromoalkanoic acid and examined for surface activities such as surface tension, emulsification and interfacial tension. Critical micelle concentration (cmc) of 3Rntata shifted to lower concentration with increasing alkyl chain length. The cmcs of 3Rntata with n of 10-14 were lower by about 1-2 orders of magnitude than those of complexane-type monomeric surfactant of 2-aminoalkanoic acid (RnNAc) and dimeric surfactant of N, N″-bis(1-carboxyalkyl)diethylenetriamine (2Rndtda) with the same alkyl groups. In the case of R12, 3Rntata gave about twice cmc of trimeric surfactant of (N1-carboxyalkyl-2-aminoethyl)alkyllamine (3Rntata) having three alkyl chains and two hydrophilic groups. Surface tension at each cmcs of 3R10tata, 3R12tata, and 3R14tata was 33.0, 26.9 and 29.6 mN m-1, respectively. 3R12tata, and 3R14tata gave more efficient in lowering the sufface tension than RnNAc and 2Rndtda. The values of cross-sectional molecular area (A) of 3Rntata with n of 10-14 were 42-75Å2. They were extremely small in comparison with three times of A of RnNAc. The aqueous solutions of 3Rntata were emulsified by shaking with toluene. Highly stable oil-in-water type emulsion was formed by using 3Rntata with n of 10-14 and the degree of emulsification was kept 60% after 20 h. Interface between the aqueous solutions of 3R10tata, 3R12tata, 3R14tata and toluene gave the interfacial tension of 1, 1 and 6 mN m-1, respectively.
- 日本油化学会の論文
- 2001-03-01
著者
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SHOSENJI Hideto
Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamot
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KOIDE Yoshifumi
Department of Applied Chemistry, Faculty of Engineering, Kumamoto University
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Koide Y
Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University
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ESUMI Kunio
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University o
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Shosenji Hideto
Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University
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Koide Yoshifumi
Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University
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YOSHIMURA Tomokazu
Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University
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ONITSUKA Emika
Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University
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Esumi K
Department Of Applied Chemistry And Institute Of Colloid And Interface Science Science University Of
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Esumi Kunio
Department Of Applied Chemistry And Institute Of Colloid And Interface Science Science University Of
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Onitsuka Emika
Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University
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Yoshimura Tomokazu
Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University
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