Critical Micelle Concentrations for Homologs of 2-(Perfluoroalkyl)ethyl Sulfate Salts in Aqueous Solution.

• TAMAKI Kunio

  Department of Chemistry, Yokohama City University

• KANNO Atsushi

  Department of Chemistry, Yokohama City University

Bibliographic Information

Other Title

• 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
• 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

Abstract

The critical micelle concentrations of homologs of 2- (perfluoroalkyl) ethyl sulfate salts C_nF_2n+1C₂H₄SO₄M (M=Li, n=4, 6, 8, 10 ; M= Na, n=4, 6, 8) and, for comparison, of alkyl sulfate salts C_mH_2m+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 C_nF_2n+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 C_nF_{2n + 1} C₂H₄SO₄M and C_mH_2m+1SO₄M were about 1.5. It may be noted that the values of cmc for C_nF_2n+1C₂H₄SO₄M correspond roughly to the cmc values of C_mH_2m+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.

Journal

• Journal of Japan Oil Chemists' Society

  Journal of Japan Oil Chemists' Society 45 (11), 1277-1279, 1996

  Japan Oil Chemists' Society

Keywords

• lithium 2- (perfluoroalkyl) ethyl sulfate
• sodium 2- (perfluoroalkyl) ethyl sulfate
• critical micelle concentration
• Krafft point

Details

• CRID: 1390282679069254016
• NII Article ID: 10002271434
• NII Book ID: AN10512582
• DOI: 10.5650/jos1996.45.1277
• ISSN: 18841996
• ISSN: 13418327
• NDL BIB ID: 4087605
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4087605
• Web Site: https://www.jstage.jst.go.jp/article/jos1996/45/11/45_11_1277/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed