| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
It is well-known that surfactant molecules adsorb at the interface between water and oil, and the mutual solubility of water and oil increases since the interfacial tension decreases. However, we recently discovered that the mutual solubility of water and 2,6-dimethylpyridine or acetonitrile decreases when non-ionic surfactant, C12E5, is dissolved. That is, C12E5 behaves as "surface-inactive" agents in these mixtures.
In order to clarify the origin of this phenomena, we performed small-angle neutron scattering (SANS) experiment on a mixture of water / 2,6-dimethylpyridine / C12E5 or water / acetonitrile / C12E5. The SANS data suggested that membrane structures composed of C12E5, i.e., bilayer structures or micelle structures, are formed in mixtures. These memranes should preferentially attract water molecules, and this results in the decrease of the mutual solubility of water and organic solvent.
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