加压热水预处理温度对毛白杨木材结构及酶解效果的影响  

Influence of Temperature of Pressurized Hot Water Treatment on Structure and Enzymatic Efficiency of Chinese White Poplar Wood

作　　者：邢靖晨 于丽丽[1] 马晓军[1] XING Jinchen YU Lili MA Xiaojun(College of Packaging ＆ Printing Engineering,Tianjin University of Science ＆ Technology, Tianjin 300222, Chin)

机构地区：[1]天津科技大学包装与印刷工程学院,天津300222

出　　处：《生物质化学工程》2017年第5期36-40,共5页Biomass Chemical Engineering

基　　金：国家自然科学基金资助项目(31270607);天津科技大学大学生创新训练项目(201510057010)

摘　　要：采用加压热水对毛白杨进行预处理,利用扫描电镜(SEM)、X射线衍射仪(XRD)、傅里叶变换红外光谱(FT-IR)等研究了预处理温度对毛白杨木材及其酶解材微结构的影响,并考察了预处理温度对还原糖得率的影响。结果表明:毛白杨木材经加压热水处理后结构松散,纤维形态和表面结构发生了改变;加压热水处理温度超过180℃以后,酶解前后物料的结晶度降低明显,酶解后的降幅最大可达74%。随着预处理温度的增加,木材酶解还原糖得率先增加后减小,其中预处理温度为200℃时还原糖得率最大可达38.3%。Chinese white poplar （Populustomentosa Carr. ） was pretreated by pressurized hot water treatment. The influences of pretreatment temperature on the structure and enzymatic efficiency of wood were discussed by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, and Fourier transform infrared spectroscopy （FT-IR）, and the effect of pretreatment temperature on the sugars yield was also investigated. Results showed that the structure of wood was loose after the pressurized hot water treatment, the morphology and structure of fiber were changed. It was also found that when the pretreatment temperature during pressurized hot water treatment was more than 180 ℃, the crystallinity of the material decreased obviously after enzymolysis, and the maximum reduction rate reached 74 %. With increasing the pretreatment temperature, the reducing sugars yields of the enzymolysis of pretreated wood increased firstly and then decreased. As the pretreating temperature was 200 ℃, the reducing sugars yield of wood could reach 38.3 %.

关 键 词：毛白杨 加压热水预处理 酶解 XRD FT-IR 

分 类 号：TQ351.3[化学工程]