非イオン界面活性剤のミセル構造に及ぼす陽イオンの影響

概要

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Effects of cations on the micellar structure of dodecyl poly (oxyethylene) ether (C12EOn, n : the average number of ethylene oxide groups) were investigated. The results are summarized as follows. 1) C12EO7 and C12EO8 micelles were spherical, the micellar volume remaining approximately the same regardless of kind of alkali cation, but the C12EO6 micelle was not spherical and had a different shape. 2) The contribution of cations to decreasing the polarity within C12EOn micelles was effective in the order of K+>Na+>Li+. 3) The contribution of cations an increase in micellar weight and the aggregation number of C12EOn was effective in order of K+>Na+>Li+. Based on the above, it was concluded that micelles having large aggregation numbers prevented water penetration from the outside, thus decreasing polarity within the micelles.
社団法人日本油化学会の論文