溶液中のクラスタ構造から見た超音波霧化現象

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  • 脇坂 昭弘
    独立行政法人産業技術総合研究所　環境管理技術研究部門　環境分子科学研究グループ

書誌事項

タイトル別名
  • Ultrasonic Atomization from the Viewpoint of Cluster Structure in Solution
  • ヨウエキ チュウ ノ クラスタ コウゾウ カラ ミタ チョウオンパムカ ゲンショウ

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抄録

When mist particles are generated from ethanol-water mixtures by ultrasonic atomization at a low temperature, ethanol is concentrated in the atomized mist particles. This paper explains the mechanisms of ethanol thickning in atomized droplets based on the cluster-level structures analysed by the mass spectrometry. When ultrasonic atomization of equimolar ethanol-water mixture is carried out at a lower temperature, e.g. 10°C, small clusters composed of only ethanol molecules can transfer from the liquid phase to the gas phase, while the large clusters consisting of both ethanol and water molecules cannot move across the interface. This leads to the thickning of ethanol in the atomized mist particles. The cluster-level structures of ethanol-water mixture, which varies with the ethanol concentration and the liquid temperature, directly determines the characteristics of ultrasonic atomization of ethanol aqueous solution.<br>

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