2006 Fiscal Year Final Research Report Summary
Spontaneous formation of multiple bilayes at water surface
| Project/Area Number |
16350075
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | KYUSHU UNIVERCITY |
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Principal Investigator |
ARATONO Makoto Kyushu University, Faculty of Sciences, Professor, 大学院理学研究院, 教授 (20175970)
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| Co-Investigator(Kenkyū-buntansha) |
TAKIUE Takanori Kyushu University, Faculty of Sciences, Associate Professor, 大学院理学研究院, 助教授 (40271100)
OHSHIMA Hiroyuki Tokyo University of Science, Faculty of Pharmaceutical Sciences, Professor, 薬学部, 教授 (60176873)
MATSUBARA Hiroki Kyushu University, Faculty of Sciences, Assistant Professor, 大学院理学研究院, 助手 (00372748)
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| Project Period (FY) |
2004 – 2006
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| Keywords | phase transition of adsorbed films / multilayer formation / interfacial tension / fluorocarbon alcohol / sugar surfactant / ionic liquid / X-ray reflectivity / external FTIR |
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| Research Abstract |
(1)In the mixture of didodecyldimethylammonium halide and dodecyltrimethylammonium halide, the concentration and composition regions of monomer, small aggregate, vesicles, micelles and their coexistence were clearly specified and displayed using the phase diagram. Multiple bilayer formation was suggested in a certain composition and concentration range. However, the reproducibility of surface tensions was clearly less compared to other regions and thus we have not yet reached at the final conclusion. This, in turn, suggests that there is a possibility that anomalous surface adsorption takes place in this region.
(2)The surface tension vs concentration curves of alkylmaltopyranoside and hexylmethyl imidazorium salt (ionic liquid) has a break point that suggests the phase transition of adsorbed films. The surface densities of these compounds at the concentrations above the break points are larger than that of monolayers and thus suggest the multilayer formation at the surface. Furthermore the adsorbed films of fluorocarbon alcohols also suggested the multilayer formation.
The precise interfacial tension measurements and the experiments of the X-ray reflectivity at the interface, external FTIR, and ellipsometry have been performing currently.
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[Journal Article] Spontaneous vesicle formation of single chain and double chain cationic surfactant mixtures.2007
Author(s)
M.Aratono, N.Onimaru, Y.Yoshikai, M.Shigehisa, I.Koga, K.Wongwailikhit, A.Ohta, T.Takanori, B.Lhoussaine, R.Strey, Y, Takata, M.Villeneuve, H, Matsubara
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Journal Title
J.Phys.Chem.B 111
Pages: 107-115
Description
「研究成果報告書概要(欧文)」より
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