1996 Fiscal Year Final Research Report Summary
Syntheses and properties of hybrid surfactants
| Project/Area Number |
07651040
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
有機工業化学
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| Research Institution | Science University of Tokyo |
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Principal Investigator |
YOSHINO Norio Science Univ.of Tokyo, Department of Industrial Chemistry, Associate Professor, 工学部, 助教授 (50084380)
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| Co-Investigator(Kenkyū-buntansha) |
ABE Masahiko Science Univ.of Tokyo, Department of Industrial and Enginreering Chemistry, Asso, 理工学部, 助教授 (40089371)
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| Project Period (FY) |
1995 – 1996
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| Keywords | Hybrid surfactant / Fluorocarbon chain / Fluoro compound / Synthesis of surfactant / Surface tension / Krafft point / Anionic surfactant |
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| Research Abstract |
Six hybrid surfactants, 1-oxo-1- [(4-fluoroalkyl) phenyl] -2-alkanesulfonates, [F (CF_2)_nC_6H_4COCH (SO_3Na) (CH_2)_m, n=4,6, m=2,4,6], were synthesized. These surfactants were obtained in 54-85% yields and the properties were white powder. Solution properties of hybrid surfactants have been measured in terms of Krafft point, surface tension, n-octane/water and water/perfluoro-n-hexane interfacial tension, and aggregation number of micelles. The Krafft point, the area occupied by a molecule at the air/water and octane/water interfaces, and the aggregation number of micelles increase with an increase of fluorocarbon and/or hydrocarbon chain length, while critical micelle concentration (cmc), surface tension, and octane/water interfacial tension at the cmc decrease with an increase of fluorocarbon and/or hydrocarbon chain length. These surfactants are found to exhibit lower surface tension and hydrocarbon/water and fluorocarbon/water interfacial tension at the same time and make it possible to float a surfactant aqueous solution on a hydrocarbon substance such as benzene.
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