The Micelle Formation of Alkylammonium Chloride in 1-Propanol–Water and Acetone–Water Mixtures

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概要

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• The change in the critical micelle concentrations (CMC) of alkylammonium chlorides (C<SUB>12</SUB>–C<SUB>18</SUB>) and in the degree of the dissociation of the micelle (α) of dodecylammonium chloride was determined by adding 1-propanol and acetone to water. Both the CMC and the α increased with an additive concentration, each reaching a maximum at a certain concentration (critical composition of solvent for micelle formation, CCSM) and decreasing beyond the CCSM. The increment in the CMC was more influenced by the alkyl-chain length in the surfactant molecule in the presence of 1-propanol than in that of acetone. The effective coefficient of electrical energy (<I>K</I><SUB>g</SUB>) and the cohesive energy difference per methylene group between the micelle and the monomer states (ω) were calculated from the CMC and the α. The <I>K</I><SUB>g</SUB> values in both mixed solvents were constant beyond the respective CCSM. The value of ω was less in the presence of 1-propanol than in that of acetone.

• 公益社団法人 日本化学会の論文

著者

• Miyagishi Shigeyoshi

  Department Of Chemistry And Chemical Engineering Faculty Of Engineering Kanazawa University

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