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2006 Fiscal Year Final Research Report Summary

Development of Novel Fluoroalkyl End-Capped Gemini Surfactants to Emulsify Fluorinated Oil

Research Project

Project/Area Number 17550173
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Organic industrial materials
Research InstitutionKyoto Institute of Technology

Principal Investigator

KAWASE Tokuzo  Kyoto Institute of Technology, Graduate School of Science and Technology, Professor, 工芸科学研究科, 教授 (60152956)

Project Period (FY) 2005 – 2006
KeywordsPerfluorooctanoic acid / Fluoroalkyl group / Two hydrophile and two lipophile surfactant / Gemini surfactants / Surface tension / Critical micellar concentration / Surface pressure-Area curve / carboxyl group
Research Abstract

Though perfluorooctanoic acid (PFOA), which is chemically and biologically stable and has excellent surfactant properties, has been widely used as an emulsifier for fluorinated oils, it is now focused on the problem that PFOA remains in human body, living entries, and also in environment. Therefore, the development of novel non-and low-remaining surfactants is necessary for the emulsification of fluorinated oils.
In this work, as fluorochemicals having short fluoroalkyl group are known to remain in body only at low level, novel two hydrophile and two lipophile surfactants (Gemini) end-capped with fluoroalkyls were designed and prepared. In 2005-2006, SO3H type Gemini surfactants having various fluoroalkyls were successfully prepared from 1,4-pentadiene via addition of fluoroalkyl radicals as key step. In 2006-2007, a new route to COOH type Gemini surfactants via linking of two fluoroalkyl substituted malonates with several methylene spacers was also established.
Their surfactant properties were studied based on the measurements of surface tension and surface pressure-Area curves. They showed excellent power of lowering surface tensions and quite lower critical micellar concentrations by 1〜2 orders in comparison with the corresponding convenient fluorinated surfactants. Moreover, based on the surface pressure-Area measurement, it was indicated that they have a superior ability to adsorb and arrange at the interface and to reduce oil/water interface tension, which will mean that they are promising as an alternative of PFOA. Next, the practical investigation of emulsification of fluorinated oils will be carried out.

  • Research Products

    (6 results)

All 2006 2005

All Journal Article (5 results) Book (1 results)

  • [Journal Article] 界面活性剤ミセル溶液中におけるコロイダルポリアニリンの合成2006

    • Author(s)
      川瀬徳三, 前田和恵, 老田達生
    • Journal Title

      材料技術 26・6

      Pages: 333-338

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Preparation of Colloidal Polyaniline in Surfactant Micellar Solutions2006

    • Author(s)
      Tokuzo Kawase, Kazue Maeda, Tatsuo Oida
    • Journal Title

      Material Technology 26(6)

      Pages: 333-338

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ch.21 "Application of Fluorinated Silane Coupling Agents"2006

    • Author(s)
      Tokuzo Kawase
    • Journal Title

      Effects and Direction for use of Silane Coupling Agents(Y.Nakamura and K.Nagata Eds.)(Science & Technology)

      Pages: 210-216

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Synthesis and applications of silicone oil-soluble fluoroalkyl end-capped cooligomers.2005

    • Author(s)
      Sawada H., Horiuchi H., Kawase T., Oharu K., Nakagawa H., Kaneda I.
    • Journal Title

      Journal of Applied Polymer Science 96(4)

      Pages: 1467-1476

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Synthesis and applications of silicone oil-soluble fluoroalkyl end-capped cooligomers.2005

    • Author(s)
      Sawada H., Horiuchi H., Kawase T., Oharu K., Nakagawa H., Kaneda I.
    • Journal Title

      J.Appl.Polym.Sci. 96(4)

      Pages: 1467-1476

    • Description
      「研究成果報告書概要(欧文)」より
  • [Book] シランカップリング剤の効果と使用法(第21章含フッ素シランカップリング剤と応用 分担)2006

    • Author(s)
      川瀬徳三(分担)
    • Total Pages
      201-216
    • Publisher
      サイエンス&テクノロジー
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2008-05-27  

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