1 Ultrasonic degradation of cellulose solutions and production of oligo-cellulose
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- Matsuoka Tatsuro
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University
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- Suzuki Tatsuya
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University
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- Futamura Kazunori
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University
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- Koda Shinobu
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University
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- Nomura Hiroyasu
- Laboratory of Chemistry, Department of Natural Science, School of Science and Technology, Tokyo Denki University
Bibliographic Information
- Other Title
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- 1 ソノリシスによるセルロース溶液からのオリゴ糖生成
Abstract
Ultrasonic degradation of cellulose is expected to give oligomers, which are valuable reagents in the biological field. In this work, we examine the ultrasonic degradation of cellulose in solutions and discuss the production of the oligo-cellulose. Cellulose (Avicel-PH101) was dissolved in lithium chloride (LiCl)/dimethylacetamide (DMAc) solvent. The concentration of LiCl was 8wt%. The ultrasonic homogenizer (BRANSON SONIFIER 450D) was used and its working frequency was 20kHz. Sonication was carried out at 25℃. The viscosity-averaged molecular (M_v) weight was estimated for the cellulose after the sonication. The M_v value of the sonicated sample deceased from 2×10^5 with increasing the ultrasonic intensity to around 1×10^5. The ethanol was added to the sonicated solutions as the precipitating agent and the precipitation was filtered and dried. After that it was dissolved in water and was fractionated into the water-insoluble component and soluble one. The water-soluble component was characterized by the GPC measurements and ^1H NMR spectroscopy. From the GPC and ^1H NMR analysis, the production of the oligo-cellulose was suggested.
Journal
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- Proceedings of the Annual Meeting of the Japan Society of Sonochemistry
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Proceedings of the Annual Meeting of the Japan Society of Sonochemistry 11 (0), 5-7, 2002
Japan Society of Sonochemistry
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Details 詳細情報について
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- CRID
- 1390001206051138944
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- NII Article ID
- 110009710174
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- ISSN
- 24241512
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed