食品科学 ›› 2017, Vol. 38 ›› Issue (14): 245-249.doi: 10.7506/spkx1002-6630-201714038

• 工艺技术 • 上一篇    下一篇

椰衣半纤维素的提取及其结构表征

王政,黄广民,赵斌,李山丹,陆大兴,胡旦   

  1. (海南大学食品学院,海南?海口 570228)
  • 出版日期:2017-07-25 发布日期:2017-09-06
  • 基金资助:
    海南省自然科学基金项目(20153161);海南省研究生创新科研课题(Hys2016-46)

Extraction and Structural Characterization of Hemicellulose from Coconut Coir Fiber

WANG Zheng, HUANG Guangmin, ZHAO Bin, LI Shandan, LU Daxing, HU Dan   

  1. (College of Food Science and Technology, Hainan University, Haikou 570228, China)
  • Online:2017-07-25 Published:2017-09-06

摘要: 以新鲜椰衣粗纤维为原料,采用NaOH溶液提取分离椰衣中的半纤维素,并对其结构进行分析表征。结果表明:在料液比1∶50(g/mL)条件下,NaOH溶液质量分数5%,提取时间4.0?h,提取温度65?℃时,椰衣半纤维素的产率最高,达14.33%。对所得样品进行红外光谱分析,确认为椰衣半纤维素,采用凝胶渗透色谱分析,数均分子质量为49?049?D,质均分子质量为368?354?D。所得椰衣半纤维素,用稀硫酸水解,高效液相色谱分析,其保留时间与标准木糖保留时间高度吻合。

关键词: 椰衣纤维, 半纤维素, 结构分析

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

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