Preparation and Surface Activities of Zwitterionic Surfactants Derived from Cotelomers of 4-Vinylpyridine and Methyl Acrylate

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概要

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• Cotelomer type zwitterionic surfactants having multi-hexyl chains and multi-carboxylate and muti-pyridinium functions (R6S-zR6VPQ-wVP-yAA, w and y means the number of 4-vinylpyridine and sodium acrylate, respectively; z means number of hexyl chains by quaternization) were prepared by quaternization and hydrolyses of cotelomers, which were prepared by cotelomerization of 4-vinylpyridine and methyl acrylate in presence of hexanethiol, and examined for their surface activities. Critical micelle concentration (cmc) of zwitterionic cotelomers shifted to lower concentration with increasing number of hexyl chains. The cmcs of R6S-zR6VPQ-wVP-yAA with z of 2.1-3.8 were from one 110th to one 4th of those of the corresponding cationic cotelomers. Zwitterionic cotelomers gave surface tension of 40-44 mN m-1 at the cmc. The increase of number of hexyl chains in R6S-zR6VPQ-wVP-2.3AA series reduced the surface activities. Vigorous shaking of the mixtures of water and chloroform solution of zwitterionic cotelomers formed oil-in-water type emulsion. Highly stable emulsion was formed by using R6S-zR6VPQ-wVP-2.3AA with z of 1.4-2.1 and the degrees of emulsification were kept at the level of 60-70% after 360 min of standing. Zwitterionic cotelomers gave interfacial tension of 2-4 mN m-1 at the water-chloroform interfaces and oriented themselves easier than equimolar mixtures of cationic cotelomer and anionic cotelomer.

• 日本油化学会の論文
• 2001-06-01

著者

• SHOSENJI Hideto

  Department of Applied Chemistry and Biochemistry, Graduate School of Science and Technology, Kumamot

• ESUMI Kunio

  Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University o

• Shosenji Hideto

  Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University

• YOSHIMURA Tomokazu

  Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University

• TOKUNAGA Rinko

  Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University

• Esumi K

  Department Of Applied Chemistry And Institute Of Colloid And Interface Science Science University Of

• Esumi Kunio

  Department Of Applied Chemistry And Institute Of Colloid And Interface Science Science University Of

• Yoshimura Tomokazu

  Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University

• Tokunaga Rinko

  Department Of Applied Chemistry And Biochemistry Faculty Of Engineering Kumamoto University

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