| Oleic Acid-based gemini surfactants with carboxylic Acid headgroups. | |
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MedLine Citation:
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PMID: 21768742 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Anionic gemini surfactants with carboxylic acid headgroups have been synthesized from oleic acid. The hydrocarbon chain is covalently bound to the terminal carbonyl group of oleic acid via an ester bond, and the carboxylic acid headgroups are introduced to the cis double bond of oleic acid via disuccinyl units. The surfactants exhibit pH-dependent protonation-deprotonation behavior in aqueous solutions. In alkaline solutions (pH 9 in the presence of 10 mmol dm(-3) NaCl as the background electrolyte), the surfactants can lower the surface tension as well as form molecular assemblies, even in the region of low surfactant concentrations. Under acidic (pH 3) or neutral (pH 6-7) conditions, the surfactants are intrinsically insoluble in aqueous media and form a monolayer at the air/water interface. In this study, we have investigated physicochemical properties such as the function of the hydrocarbon chain length by means of static surface tension, pyrene fluorescence, dynamic light scattering, surface pressure-area isotherms, and infrared external reflection measurements. |
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Authors:
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Kenichi Sakai; Naoki Umemoto; Wataru Matsuda; Yuichiro Takamatsu; Mutsuyoshi Matsumoto; Hideki Sakai; Masahiko Abe |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of oleo science Volume: 60 ISSN: 1347-3352 ISO Abbreviation: J Oleo Sci Publication Date: 2011 |
Date Detail:
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Created Date: 2011-07-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101175339 Medline TA: J Oleo Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 411-7 Citation Subset: IM |
Affiliation:
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Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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