Precise measurement of ultrasonic absorption in micellar solutions in the frequency range from 0.2 to 10 MHz.

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概要

• 論文の詳細を見る

• A cylindrical resonator for the measurement of ultrasonic absorption has been designed. It was found that a newly designed resonator can determine the absolute value of the ultrasonic absorption coefficient of water at frequencies above 0.7 MHz. For aqueous solutions it has a sufficient resolution power down to 0.2 MHz by means of a reference measurement. Precise measurements of ultrasonic absorption were carried out for aqueous solutions of dodecyltrimethylammonium bromide using a newly designed resonator and two other previously reported resonators. The ultrasonic relaxation spectra show a single relaxation process within the investigated frequency range. The relaxation process can be ascribed to a "fast" relaxation related to the exchange of a surfactant between micelles and bulk solution. The kinetic parameters for the exchange process were estimated on the basis of Teubner's theory.

• 公益社団法人 日本化学会の論文

著者

• Kato Shigeo

  Department Of Astrophysics Nagoya University

• Nomura Hiroyasu

  Department Of Chemical Engineering Faculty Of Engineering Nagoya University

• Zielinski Ryszard

  Department of Chemistry, Faculty of Science, Nagoya University

• Ikeda Shoichi

  Department of Chemistry, Faculty of Science, Nagoya University

• Ikeda Shoichi

  Department of Biology, Osaka University

• Kato Shigeo

  Department of Chemical Engineering, School of Engineering, Nagoya University

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