Electrocapillary Phenomena at Edible Oil/Saline Interfaces
| Autor: | Takuya Ohzono, Shin Yagihara, Kohei Shoji, Hisao Tanaka, Masafumi Hayashi, Satoshi Nishimura |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
General Chemical Engineering
medicine.medical_treatment Analytical chemistry Interfacial polarization 02 engineering and technology Sodium Chloride 010402 general chemistry 01 natural sciences Surface tension chemistry.chemical_compound Electric field medicine Edible oil Plant Oils Surface Tension Polarization (electrochemistry) Saline Chromatography Chemistry General Medicine General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Oleic acid Electrowetting Sodium oleate Rapeseed Oil 0210 nano-technology Electromagnetic Phenomena Oleic Acid |
| Zdroj: | Journal of Oleo Science. 66:235-249 |
| ISSN: | 1347-3352 1345-8957 |
| Popis: | Interfacial tension between edible oil and saline was measured under applied electric fields to understand the electrocapillary phenomena at the edible oil/saline interfaces. The electric responses of saline droplets in edible oil were also observed microscopically to examine the relationship between the electrocapillary phenomena and interfacial polarization. When sodium oleate (SO) was added to edible oil (SO-oil), the interfacial tension between SO-oil and saline decreased. However, no decrease was observed for additive-free oil or oleic acid (OA)-added oil (OA-oil). Microscopic observations suggested that the magnitude of interfacial polarization increased in the order of additive-free oil < OA-oil < SO-oil. The difference in electrocapillary phenomena between OA- and SO-oils was closely related to the polarization magnitude. In the case of SO-oil, the decrease in interfacial tension was remarkably larger for saline (pH 5.4~5.6) than that for phosphate-buffered saline (PBS, pH 7.2~7.4). However, no difference was observed between the electric responses of PBS and saline droplets in SO-oil. The difference in electrocapillary phenomena for PBS and saline could not be simply explained in terms of polarization magnitude. The ratio of ionized and non-ionized OA at the interfaces changed with the saline pH, possibly leading to the above difference. |
| Databáze: | OpenAIRE |
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