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Paper Abstract and Keywords
Presentation 2014-01-27 10:00
Frequency dependence of the ultrasonic degradation of a polyethlene glycol
Kazuya Nagamine, Taisuke Ihozaki, Ryuichi Arakawa, Ken Yamamoto (Kansai Univ.) US2013-81
Abstract (in Japanese) (See Japanese page) 
(in English) The polyethylene glycol (PEG) of the average molecular weight 6000 in aqueous media was degraded using the ultrasonic waves of frequency 20 kHz, 400 kHz, and 1 MHz. Sonicated PEG solutions were investigated by means of matrix-assistedlaser desorption/ionization time-of-flight mass spectrometry(MALDI-TOFMS). The degradation effects at 400 kHz and 1 MHz were much higher than that at 20 kHz that generally used for ultrasonic cleaner or the chemical industry. Sonoluminescence spectrum from PEG solution during the sonication was measured in the range of 240-370 nm. As compared with sonoluminescence spectrum of distilled water saturated with Ar, broadband luminescence spectrum from PEG solution was very strong. However, the spectral peaks from OH radical emission of 290 nm, 310 nm and 340 nm disappeared almost completely. We found that higher-frequency sonication is more effective for the degradation of PEG than horn-type sonication at tens of kHz. This ultrasonic degradation process of PEG was suggested to becaused by OH radicals.
Keyword (in Japanese) (See Japanese page) 
(in English) polyethylene glycol / sonoluminescence / OH radical / / / / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 412, US2013-81, pp. 1-4, Jan. 2014.
Paper # US2013-81 
Date of Issue 2014-01-20 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EA US  
Conference Date 2014-01-27 - 2014-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Kansai University, Centenary Memorial Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonic and Underwater Acoustics，and Related Topics 
Paper Information
Registration To US 
Conference Code 2014-01-EA-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Frequency dependence of the ultrasonic degradation of a polyethlene glycol 
Sub Title (in English)  
Keyword(1) polyethylene glycol  
Keyword(2) sonoluminescence  
Keyword(3) OH radical  
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1st Author's Name Kazuya Nagamine  
1st Author's Affiliation Kansai University (Kansai Univ.)
2nd Author's Name Taisuke Ihozaki  
2nd Author's Affiliation Kansai University (Kansai Univ.)
3rd Author's Name Ryuichi Arakawa  
3rd Author's Affiliation Kansai University (Kansai Univ.)
4th Author's Name Ken Yamamoto  
4th Author's Affiliation Kansai University (Kansai Univ.)
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Speaker Author-1 
Date Time 2014-01-27 10:00:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2013-81 
Volume (vol) vol.113 
Number (no) no.412 
Page pp.1-4 
#Pages 4 
Date of Issue 2014-01-20 (US) 

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