1 Ultrasonic degradation of cellulose solutions and production of oligo-cellulose

Matsuoka Tatsuro, Suzuki Tatsuya, Futamura Kazunori, Koda Shinobu, Nomura Hiroyasu

doi:10.20577/pamjss.11.0_5

Bibliographic Information

Other Title

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

Proceedings of the Annual Meeting of the Japan Society of Sonochemistry

Proceedings of the Annual Meeting of the Japan Society of Sonochemistry 11 (0), 5-7, 2002

Japan Society of Sonochemistry

Details 詳細情報について

CRID: 1390001206051138944

NII Article ID: 110009710174

DOI: 10.20577/pamjss.11.0_5

ISSN: 24241512

Text Lang: ja

Data Source

JaLC
CiNii Articles

Abstract License Flag: Disallowed

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