Extraction and Structural Characterization of Hemicellulose from Coconut Coir Fiber

doi:10.7506/spkx1002-6630-201714038

Abstract

Abstract: In this investigation, hemicellulose was extracted from crude coconut coir fiber with aqueous sodium hydroxide solution, and its structure was analyzed. It turned out that the highest yield (14.33%) of hemicellulose was obtained when the extraction was performed at 65 ℃ for 4.0 h in 5% sodium hydroxide solution with a solid-to-solvent ratio of 1:50 (g/mL). The extracted product was confirmed as hemicelluloses using infrared spectroscopy. By gel permeation chromatography, the number-average molecular weight of the hemicellulose was 49 049 D and weight-average molecular weight 368 354 D. The hemicellulose was hydrolyzed with sulfuric acid and analyzed by high performance liquid chromatography, and the results showed that the retention time was completely consistent with that of standard xylose.

Key words: coir fiber, hemicellulose, structural characterization

CLC Number:

TQ352

WANG Zheng, HUANG Guangmin, ZHAO Bin, LI Shandan, LU Daxing, HU Dan. Extraction and Structural Characterization of Hemicellulose from Coconut Coir Fiber[J]. FOOD SCIENCE, 2017, 38(14): 245-249.

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Extraction and Structural Characterization of Hemicellulose from Coconut Coir Fiber

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