硫酸２‐（ペルフルオロアルキル）エチル塩同族体水溶液の臨界ミセル濃度

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タイトル別名
  • Critical Micelle Concentrations for Homologs of 2-(Perfluoroalkyl)ethyl Sulfate Salts in Aqueous Solution.
  • リュウサン 2 ペルフルオロアルキル エチルエン ドウゾクタイ スイヨウエキ

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The critical micelle concentrations of homologs of 2- (perfluoroalkyl) ethyl sulfate salts CnF2n+1C2H4SO4M (M=Li, n=4, 6, 8, 10 ; M= Na, n=4, 6, 8) and, for comparison, of alkyl sulfate salts CmH2m+1SO4M (M=Li, Na, m=8, 10, 12, 14) in water were measured, and the values of cmc at 25 °C are expressed in the form, log cmc=A+Bn (or m). The B values of CnF2n+1 C2H4SO4M are -0.44 ; this means that the values of cmc decrease by the factor of about 2.8 for each CF2 group added to the perfluoroalkyl chain. The ratios of the values of B between CnF2n + 1 C2H4SO4M and CmH2m+1SO4M were about 1.5. It may be noted that the values of cmc for CnF2n+1C2H4SO4M correspond roughly to the cmc values of CmH2m+1SO4M with m=1.5 n+2. The Krafft points of C8F17C2H4SO4Na and C10F21C2H4SO4Na in water were found to be 46 and 67 °C, respectively.

収録刊行物

  • 日本油化学会誌

    日本油化学会誌 45 (11), 1277-1279, 1996

    公益社団法人 日本油化学会

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