The Degradation of Lignin, Cellulose, and Hemicellulose in Kenaf Bast Under Different Pressures Using Steam Explosion Treatment
The Degradation of Lignin, Cellulose, and Hemicellulose in Kenaf Bast Under Different Pressures Using Steam Explosion Treatment
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DOI：
10.1080/02773813.2017.1303514
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发表时间：
2017-01-01
影响因子：
2
通讯作者：
Via, Brian
中科院分区：
文献类型：
--
作者：
Jiang, Wei;Han, Guangting;Via, Brian
主要化学成分降解的研究，特别是纤维素在高温和高湿度环境下的降解，为指导使用蒸汽爆炸（STEX）和其他类似处理生物质提供了重要的信息。本研究采用STEX在0.5、1.0和1.5MPa压力下处理红麻韧皮。对其化学成分变化和红外光谱进行了研究。测定了红麻纤维素的结晶指数和聚合度。结果表明，在STEX处理下，果胶和半纤维素容易被降解，而木质素只表现出轻微的分解；纤维素在1.5 MPa的STEX处理下降解。研究还表明，低分子量的纤维素可以通过低压STEX处理去除。将STEX与化学脱胶工艺耦合，可获得残胶含量7.12%、细度134.5Nm的优质红麻纤维。
The study of the main chemical composition degradation, especially cellulose degradation at high temperatures and within high moisture environments, provides important information that can guide biomass processing using steam explosion (STEX) and other similar treatments. In this paper, kenaf bast was treated using STEX at pressures of 0.5, 1.0, and 1.5MPa. The chemical composition change and the infrared spectra were investigated. The crystalline index and degree of polymerization of kenaf cellulose were also quantified. It was found that pectin and hemicellulose could be easily degraded with the STEX treatment, while lignin only exhibited slight decomposition; cellulose degraded at 1.5 MPa STEX treatment on the kenaf. Research also indicates that cellulose with a low molecular weight can be removed with a low-pressure STEX treatment. By coupling STEX with chemical degumming process, the high-quality kenaf fiber with 7.12% residue gum content and 134.5Nm fineness can be obtained.