蒸汽爆破和有机溶剂预处理对杨木底物酶水解性质的影响  

Effect of Steam Explosion and Organosolv Pretreatment on the Hydrolysis of Poplar Substrate

作　　者：亢能[1] 刘忠[1] 惠岚峰[1] 卢秀娟[1] 苗红[1] 

机构地区：[1]天津科技大学天津市制浆造纸重点实验室,天津300457

出　　处：《林产化学与工业》2012年第4期43-46,共4页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(31000283;21076160);天津市自然科学基金合作项目(09ZCGHHZ00800)

摘　　要：选取三倍体毛白杨为原料,通过分析最优条件下有机溶剂法和蒸汽爆破法预处理后纤维素得率、结晶度指数、木质素含量及酶水解的结果,比较两种预处理工艺对底物性质的影响。结果表明:蒸汽爆破法能脱出部分木质素,而有机溶剂法能使大部分木质素脱除,木质素质量分数比未处理的降低63.34%。与原料相比,经过预处理后,结晶度指数都有所提高,蒸汽爆破预处理后达1.962,有机溶剂法预处理后达1.712。有机溶剂法预处理的样品葡萄糖转化率为81.36%,蒸汽爆破预处理的样品的葡萄糖转化率可达91.29%。The influences of steam explosion and organosolv pretreatments on the cellulose content, crystallinity index, lignin con- tent and hydrolysis of the triploid populous tomentosa under the optimal conditions were investigated in present study. Their im- pacts on hydrolysis characterizations of poplar substrate were studied, too. The results indicated that lignin could partly be re- moved by steam explosion pretreatment. In contrast, organosolv pretreatment can removed more lignin than that by steam explo- sion. The lignin was 63.34% lower than that of untreated one. The crystallinity index increased to 1. 962 after steam explosion and to 1. 712 after organosolv pretreatment compared to the raw material. The conversion rate of glucose was 81.36% after or- ganosolv pretreatment and up to 91.29% after steam explosion.

关 键 词：蒸汽爆破法 有机溶剂法 预处理工艺 水解性质 酶水解 底物 木质素含量 杨木 

分 类 号：TQ35[化学工程]