Monitoring the Stability of an Emulsion by High-Frequency Spectroscopy

通过高频光谱监测乳液的稳定性

• 批准号: 14540564
• 负责人: SUGITANI Yoshinori
• 金额: $ 1.34万
• 依托单位: Kanagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540564/
• 关键词: emulsion; high-frequency spectroscopy; stability; frequency shift; permittivity; 高周波分光; emulsion; stability evaluation; high frequency spectra; oil-in-water

High-Frequency spectroscopy has been applied to monitoring the stability of oil-in-water emulsions. Emulsion is a kind of colloidal suspension composed of a liquid dispersed throughout another liquid, like oil droplets in water. It was found that stable emulsions showed absorption peaks at around 550 MHz ; further, they shifted from lower to higher frequencies with time. The amount of shift from lower to higher frequencies increased with the stored time. The rate of increase of the frequencies was dependent on the amount of emulsifier added. These results show that the stability of emulsions can be monitored by the amount of the frequency shift.The reason why the absorption peak shifted to a higher frequency region is considered to be because the relative ratio of oil to water increased in the upper layer of the emulsion sample, where the electrode of detecting resonance was dipped.

高频光谱已被应用于监测水包油乳液的稳定性。乳化液是一种胶体悬浮液，由一种液体分散在另一种液体中组成，就像油滴在水中一样。结果发现，稳定的乳液在550 MHz附近显示出吸收峰;此外，它们随时间从较低频率向较高频率移动。从较低频率到较高频率的偏移量随着存储时间的增加而增加。频率的增加速率取决于添加的乳化剂的量。实验结果表明，可以通过频移量来监测乳状液的稳定性，其吸收峰向高频区移动的原因可能是由于在乳状液样品的上层，即检测共振的电极所处的位置，油水的相对比例增加。

项目成果

杉谷 嘉則: "高周波分光法を用いるD-グルコースの異性化反応の追跡"分析化学. 51・9. 735-739 (2002)

杉谷义典：“利用高频光谱追踪 D-葡萄糖的异构化反应”，分析化学 51・9（2002 年）。

Takei, Kuroeaki, Nishimoto, Sugitani: "Behavior of Bound Water in Polyethylene Oxide Studied by DSC and High-Frequency Spectroscopy"ANALYTICAL SCIENCES. 18・6. 601-604 (2002)

Takei、Kuroeaki、Nishimoto、Sugitani：“通过 DSC 和高频光谱研究聚环氧乙烷中的结合水行为”分析科学 18・6 (2002)。

Yuko Nishimoto: "Detection of water-polar solvent interaction using melting of eutectic"Thermochimica acta. 399. 139-144 (2003)

Yuko Nishimoto：“利用共晶熔化检测水-极性溶剂相互作用”Thermochimica acta。

杉谷嘉則: "高周波分光法を用いるD-グルコースの異性化反応の追跡"分析化学. 51・9. 735-739 (2002)

杉谷义典：“利用高频光谱追踪 D-葡萄糖的异构化反应”，分析化学 51・9（2002 年）。

Yoshinori Sugitani: "High-frequency spectroscopic study on the isomerization of a D-glucose aqueous solution"BUNSEKI. Vol.51, No.9. 735-739 (2002)

杉谷义典：“D-葡萄糖水溶液异构化的高频光谱研究”BUNSEKI。