荻的蒸汽爆破预处理研究

摘要

研究了蒸汽爆破预处理对荻化学组成变化以及纤维素酶水解效率的影响，通过扫描电镜(SEM)、X 射线衍射仪(XRD)和红外光谱等分析爆破预处理对荻纤维形态、结构的影响．结果表明：蒸汽爆破预处理后物料中绝大部分半纤维素发生降解，部分木质素降解溶出，纤维素的相对含量有所提高；蒸汽爆破预处理后荻纤维表面和细胞壁受到不同程度的破坏，纤维素绝对结晶度降低，有利于酶水解作用进行；未处理原料的酶水解效率仅为14.38%,，蒸汽爆破预处理后纤维素酶水解效率最高达到了88.95%,．%The effects of steam-explosion pretreatment on the composition and enzymatic hydrolysis efficiency of solid residues of Triarrherca sacchariflora were investigated in the experiments.The fiber shape and structure have been charac-terized with scanning electron microscopy(SEM),as well as infrared and X-ray diffraction(XRD)spectrum methods.The results showed that after the steam explosion pretreatment,most hemicellulose was degraded,a fraction of lignin was also solubilized,and the relative content of cellulose was increased.The fiber surface and cell wall of Triarrherca sacchariflora were broken in various extents and the cellulose crystallinity was reduced,which were helpful to increasing the efficiency of enzymatic hydrolysis.The enzymatic hydrolysis efficiency of the untreated material was only 14.38%,,but the highest enzy-matic hydrolysis efficiency of 88.95%, was obtained after the steam-explosion pretreatment.