稻草木质素的硫酸法提取与表征

doi:10.3969/j.issn.1000-1565.2016.05.005

河北大学学报(自然科学版) ›› 2016, Vol. 36 ›› Issue (5): 474-479.DOI: 10.3969/j.issn.1000-1565.2016.05.005

稻草木质素的硫酸法提取与表征

张保平^1,2,杨芳^1,2,马钟琛^1,2,郭美辰^1,2,刘运^1,2

收稿日期:2015-11-17 出版日期:2016-09-25 发布日期:2016-09-25
通讯作者: 杨芳(1989—),女,湖北黄冈人,武汉科技大学在读硕士研究生.E-mail:1290738823@qq.com
作者简介:张保平(1974—),男,江西宁都人,武汉科技大学副教授,博士后,主要从事有色金属冶炼方面研究. E-mail:zbp2001@sina.com
基金资助:
教育部留学回国人员科研启动基金资助项目;冶金及资源利用省部共建教育部重点实验室开放基金资助项目(FMRU201203)

Extraction and characterization of the lignin from rice straw by sulfuric acid

ZHANG Baoping^1,2,YANG Fang^1,2,MA Zhongchen^1,2,GUO Meichen^1,2,LIU Yun^1,2

1.Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China; 2.The State Key Laboratory ofRefractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

Received:2015-11-17 Online:2016-09-25 Published:2016-09-25

摘要/Abstract

摘要： 用硫酸法提取农作物废弃物稻草中的木质素,采用质量分数72%的硫酸,以15(mg)∶1(L)的液固单位比,室温下反应2 h,得到产率9.23%的木质素.利用扫描电镜(SEM)、综合热分析、傅里叶红外光谱(FTIR)和氢核磁共振波谱(¹H-NMR)分析手段表征木质素的物理性质和化学结构,结果表明:木质素呈表面粗糙且有大量孔隙的不规则块状结构,在175~700 ℃内发生热解,分子结构中存在着大量羟基、羰基和醚键等活性官能团,属于对羟基苯基-愈创木基-紫丁香基型木质素.

关键词: 木质素, 稻草, 硫酸法, 表征

Abstract: In this work,lignin was extracted from rice straw by sulfuric acid.The brown lignin was obtained through extraction by 72% H₂SO₄ for 2 h at room temperature and the ratio of liquid to solid was 15.The content of lignin in rice straw was 9.23%.The lignin was analyzed using scanning electron microscope(SEM),thermogravimetric analysis and differential scanning calorimetry(TG-DSC),Fourier transform infrared spectroscopy(FT-IR)and proton nuclear magnetic resonance(¹H-NMR).It was showen that the lignin was irregular block,its surface was rough and lacunaris,and it had a good thermal stability,and the decomposition temperature of lignin was between 175 ℃ and 700 ℃.It contained many functional groups like hydroxyl,carbonyl,ether linkage and benzene ring structure and was composed of p-hydroxyphenyl lignin,guaiacyl lignin and syringyl lignin.

Key words: lignin, rice straw, sulfuric acid separation, characterization

中图分类号:

O636.2

张保平,杨芳,马钟琛,郭美辰,刘运. 稻草木质素的硫酸法提取与表征[J]. 河北大学学报(自然科学版), 2016, 36(5): 474-479.

ZHANG Baoping,YANG Fang,MA Zhongchen,GUO Meichen,LIU Yun. Extraction and characterization of the lignin from rice straw by sulfuric acid[J]. Journal of Hebei University (Natural Science Edition), 2016, 36(5): 474-479.

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稻草木质素的硫酸法提取与表征

Extraction and characterization of the lignin from rice straw by sulfuric acid

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