Comparison of the Thermal Degradation Properties of Crystalline and Amorphous Cellulose, as well as Treated Lignocellulosic Biomass
Comparison of the Thermal Degradation Properties of Crystalline and Amorphous Cellulose, as well as Treated Lignocellulosic Biomass
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DOI：
10.15376/biores.11.3.6309-6319
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发表时间：
2016-08-01
期刊：
影响因子：
1.5
通讯作者：
Hideno, Akihiro
中科院分区：
文献类型：
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作者：
Hideno, Akihiro
本研究以微晶纤维素、无定形纤维素及处理过的桧木锯屑为研究对象，进行热重分析。结晶纤维素的热降解温度随球磨时间的增加而降低，而无定形纤维素的热降解温度变化不大。然而，结晶纤维素（即，球磨前）和无定形纤维素（即，球磨后）。高结晶度纤维素的DTG曲线与低结晶度纤维素的DTG曲线相似。球磨使JC的热降解温度降低，DTG峰形变宽变低。这些影响可能是由非纤维素物质如半纤维素和木质素的变性引起的。DTG曲线揭示的热降解行为可以作为结晶纤维素纯度和木质纤维素生物质的其他物理性质的指标。
Thermo-gravimetric analyses of three cellulosic substances, namely, microcrystalline and amorphous cellulose, and treated Japanese cypress (JC) sawdust were carried out in this study. The thermal degradation temperature of crystalline cellulose decreased with increasing ball-milling time, while that of amorphous cellulose barely changed. However, small differences in the derivative thermo-gravimetric (DTG) curves between crystalline cellulose (i.e., before ball milling) and amorphous cellulose (i.e., after ball milling) were observed. The DTG curves of high-crystalline cellulose were sharp and similar to those of low-crystalline samples. The thermal degradation temperature of JC was decreased by ball milling, and its DTG peak shape became broad and low. These effects could be caused by the denaturing of non-cellulosic substances such as hemicellulose and lignin. The thermal degradation behaviors revealed by the DTG curves may serve as indicators of crystalline cellulose purity and other physical properties of lignocellulosic biomass.