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1988 Fiscal Year Final Research Report Summary

Studies on Association-dissociation and Interaction of Hydrophilic, Reversible Colloids

Research Project

Project/Area Number 60430003
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field 物理化学一般
Research InstitutionNagoya University

Principal Investigator

IKEDA Shoichi  Faculty of Science, Nagoya University Professor, 理学部, 教授 (20022535)

Co-Investigator(Kenkyū-buntansha) TOMIYAMA Tetsuo  Faculty of Science, Nagoya University Research Associate, 理学部, 助手 (20155576)
IMAE Toyoko  Faculty of Science, Nagoya University Research Associate, 理学部, 助手 (80101161)
MAEDA Hiroshi  Faculty of Science, Nagoya University Assistant Professor, 理学部, 助教授 (20022626)
Project Period (FY) 1985 – 1988
KeywordsIonic surfactant / Light scattering / Spherical micelle / Rodlike micelle / Sphere-rod transition / Micelle molecular weight / Sedimentation coefficient / 可溶化
Research Abstract

Our investigation on the salt-induced sphere-rod transition of micelles of ionic surfactants has been extended to aqueous sodium halide soultions of alkyltrimethylammonium halides having teragecyl and cetyl groups, Halides are chloride and bromide. Micelle molecular weight was been measured by light scattering. The threshold salt concentration of the sphere-rod transition is lower, as the alkyl chain is longer and as the counterion is bromide rather than chloride. The dependence of micelle molecular weight of rodlike micelles on the salt concentration is primarily determined by the degree of counterion binding. Ultracentrifugal sedimentation of aqueous NaCl solutions of dodecyldimethylammonium chloride has been measured, and charateristic feature is observed on the schlieren pattern of rodlike micelles, accompanying spherical micelles, and having strong concentration dependence of sedimentation coefficient itself. Solubilization power toward a water-insoluble dye is about twice larger for rodlike micelles than for spherical micelles.
Light scattering from aqueous solutions of dimethyloleylamine oxide in the presence of HCl or NaCl or both has been measured, and anomalous angular dependence is observed, indicating strong external interference, when the rodlike micelle has molecular weight around a million.
The effects of cationic surfactants on the conformation of anionic polypeptides, i.e.,sodium poly-L-glutamate and sodium poly-S-carboxymethyl-L-cyteine, have been examined by means of ciruclar dichroism measurements. Dodecylammonium chloride can induce the -helix and the -conformation, respectively, in aqueous solution, but its N-methyl-substitution reduces this induction. Generally, alkylammonium chlorides having alkyl longer than heptyl can induce the -helix of poly-L-glutamic acid, but their effects inducing the -conformation of poly-S-carboxymethyl-L-cysteine are somewhat compli-cated.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 今栄東洋子,神谷律,池田勝一: Journal of Colloid and Interface Science. 108. 215-225 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今栄東洋子,池田勝一: Journal of Physical Chemistry. 90. 5216-5223 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今栄東洋子,池田勝一: Colloid and Polymer Science. 265. 1090-1098 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 尾関寿美男,池田勝一: Journal of Physical Chemistry. 89. 5088-5093 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 今栄東洋子,池田勝一: Colloid and Polymer Science. 263. 756-766 (1985)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 前田悠,根津尚史,深田和宏,池田勝一: Macromolecules. 21. 1154-1158 (1988)

    • Description
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  • [Publications] 池田勝一: "コロイド化学" 裳華房, 232 (1986)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toyoko,Imae; Ritsu,Kamiya; Shoichi,Ikeda: "Formation of Spherical and Rodlike Micelles of Cetyltrimethylammonium Bromide in Aqueous NaBr Solutions" Journal of Colloid and Interface Science. 108. 215-225 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toyoko,Imae; Shoichi,Ikeda: "Sphere-Rod Transition of Micelles of Tetradecyltrimethylammonium Halides in Aqueous Sodium Halide Solutions" Jourmal of Physical Chemistry. 90. 5216-5223 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toyoko,Imae; Shoichi,Ikeda: "Characteristics of Rodlike Micelles of Cetyltrimethylammonium Chloride in Aqueous NaCl Solutions" Colloid and Polymer Science. 265. 1090-1098 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sumio,Ozeki; Shoichi,Ikeda: "The Difference in Solubilization Power between Spherical and Rodlike Micelles of Dodecyldimethylammonium Chloride in Aqueous Solutions" Journal of Physical Chemistry. 89. 5083-5093 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroshi,Maeda; Hisashi,Nezu; Kazuhiro,Fukada; Shoichi,Ikeda: "Effects of Hydrocarbon Chain Length of Cationic Surfactants on the Induction of the Secondary Structures of Anionic Polypeptides" Macromolecules. 21. 1154-1158 (1988)

    • Description
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  • [Publications] Shoichi,Ikeda: Colloid Chemistry. Shokabo, 232 (1986)

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Published: 1990-03-20  

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