林产化学与工业2018，Vol.38Issue(3)：69-74,6.DOI:10.3969/j.issn.0253-2417.2018.03.009
螺杆蒸汽爆破预处理对稻秆结构及其无胶板性能的影响
Effect of Screw-extrusion Steam Explosion on the Structure of Rice Straw and the Performance of Binderless Board
摘要
Abstract
The rice straw ( RS) was pretreated by continuous screw-extrusion steam explosion to obtain steam explosion pretreated rice straw for the preparation of binderless board. The pretreated rice straw was washed by distilled water and filtered to obtain washing solution and filter residue ( steam explosion pretreated rice straw fiber, SE-RS ) . The structure and properties were investigated by scanning electron microscopy ( SEM ) , ultraviolet-visible absorption spectrum ( UV-Vis ) , Fourier transform infrared spectroscopy ( FT-IR) , X-ray diffraction ( XRD) , thermogravimetric analysis ( TGA) , components testing and moisture absorption testing respectively. The SEM images show that after pretreatment the surface structure of rice straw was destoried and the fiber bundle was separated to slender fiber and fragment. The UV-Vis , FT-IR and TG analyses showed that the hemicellulose and lignin of RS were degraded during the pretreatment and there was no significant change in the structure of fiber. Comparing to the raw material, the content of benzene-alcohol extract and the ash of SE-RS were decreased by 36. 91% and 23. 13%respectively;The crystallinity of cellulose was increased by 10.61% and the moisture absorption rate was decreased by 17.02%after washing. Binderless boards were then prepared from rice straw and pretreated rice straw. The modulus of rupture ( MOR) and modulus of elasticity ( MOE) of the binderless board was increased by 142. 02% and 196. 78% compared to the control respectively, and the thickness expansion rate of water absorption for 2 h( 2 h TS) was only one-third of the control′s.关键词
连续式蒸汽爆破/预处理/稻秆/蜡质层/无胶板Key words
continuous steam explosion/pretreatment/rice straw/wax layer/binderless board分类
化学化工引用本文复制引用
冯彦洪,王端,肖和平,何和智,瞿金平..螺杆蒸汽爆破预处理对稻秆结构及其无胶板性能的影响[J].林产化学与工业,2018,38(3):69-74,6.基金项目
国家自然科学基金资助项目(51373058) （51373058）
2015年江苏省"双创计划"(无编号) （无编号）
广东省特支计划(2015TX01X151) （2015TX01X151）
