P4 キャビテーションバブル界面領域におけるアニオン界面活性剤の分解(ポスターセッション)

概要

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In this study, aqueous solutions of STS and 3 kinds of linear alkyl benzene sodium sulfonate (LAS) were adjusted to 100-1000mM. After that, these samples (STS, LAS C_8, LAS C_<10>, LAS C_<12>) were irradiated by 200kHz ultrasound (W=8.4W) under argon atmosphere. Because of their involatile and amphiphilic properties, LAS accumulates at the gas-liquid interface of cavitation bubbles but doesn't go into the bubbles. These properties are used for analysis of the reaction at the interface of cavitation bubbles. Analysis of their concentrations and SO_4^<2-> concentrations was performed by HPLC and IC. Surface excess concentrations were also measured. The degradation rate increases with increasing of the surface excess value, but after the local maximal value, it tends to decrease. It shows that there is the limit of surfactant's accumulation on the interface of cavitation bubbles.
日本ソノケミストリー学会の論文
2006-10-27