著者

大常 雄基 安田 啓司 朝倉 義幸

出版者

日本ソノケミストリー学会

雑誌

ソノケミストリー討論会講演論文集 25 (ISSN:24241512)

巻号頁・発行日

pp.39-40, 2016 (Released:2017-07-21)

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To investigate generation of ultrasonic cavitation in gel, sodium polyacrylate swollen in potassium iodide solution was used as a sample. After ultrasonic irradiation at 500 kHz, absorbance and viscosity of sample were measured. The absorbance and viscosity changes are originated from oxidation reaction of potassium iodide and decrease in the degree of polymerization of sodium polyacrylate, respectively. The absorbance started to increase after several minutes irradiation. On the other hand, viscosity decreases immediately after irradiation. This is because polymer is degraded due to shear stress of ultrasonic propagation in addition to cavitation. After sample viscosity fully decreased, it is able to generate ultrasonic cavitation and chemical reaction occurs. As sample temperature became lower, the viscosity decreased and the absorbance increased. To use this sample, detection of cavitation generation in gel is possible.