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논문 기본 정보

자료유형
학술저널
저자정보
Rui Li (Qilu University of Technology) Guihua Yang (Qilu University of Technology) Jiachuan Chen (Qilu University of Technology) Ming He (Qilu University of Technology)
저널정보
한국펄프·종이공학회 펄프·종이기술 펄프·종이기술 제49권 제4호(통권 제177호)
발행연도
2017.8
수록면
29 - 40 (12page)
DOI
10.7584/JKTAPPI.2017.08.49.4.29

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초록· 키워드

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In this paper, the stepwise alkaline extraction and structural characterization of hemicelluloses in corn stalk were conducted, and the theoretical support for the application of hemicelluloses was provided. Stepwise alkaline extraction of dewaxed corn stalk was performed with water, KOH aqueous solution (0.6%, 1.0%, 1.5%, and 2.0%) and a mixture of KOH solution and ethanol with a volume ratio of 2:3, and under these conditions, 2.6%, 10.2%, 16.5%, 24.8%, 11.2% and 8.7% of total hemicelluloses were extracted from corn stalk, respectively. The six types of hemicelluloses from different KOH concentration extraction process were characterized by high performance anion exchange chromatography, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TG), carbon-13 magnetic resonance spectroscopy (13C-NMR) and hydrogen-1magnetic resonance spectroscopy (1H-NMR). Xylose was the predominant sugar constituent in the six types of hemicelluloses, and arabinose, glucose and galactose were present in small amounts. The straight chain and higher thermal stability hemicellulose can be obtained at optimal alkali concentration. An optimal alkali solution concentration was found to be at 1.5% KOH with the higher yield, xylose content and thermal stability of the hemicelluloses. NMR analysis showed that the alkaline extraction of the corn stalk with 1.5% KOH did not result in any obvious change in the macromolecular structure of hemicelluloses.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
Literature Cited

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UCI(KEPA) : I410-ECN-0101-2018-586-001270784