离子液体微乳液预浸渍对桉木酶解效率的影响  

Effect of Preimpregnation with Ionic Liquid Microemulsion on Enzymolysis Efficiency of Eucalyptus

作　　者：杨仁党[1] 李龙[1] 杨飞[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2015年第6期30-36,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家"十二五"科技支撑计划项目(2013BAC01B03);华南理工大学中央高校基本科研业务费专项资金资助项目(2014ZZ0062)~~

摘　　要：研究了碱强化的离子液体微乳液（DILMS）体系的配比、浸渍方式及处理条件对速生阔叶材桉木酶解效率的影响，探讨了浸渍处理后原料残渣和浸渍液中单糖含量的变化，并利用离子色谱法对单位质量底物的葡萄糖增加比进行定量分析．实验结果表明：适宜的DILMS浸渍工艺参数为100℃、8h、底物目数40（即直径180～380μm），进一步结合碱强化的乙二胺浸渍工序（70℃，3h）而形成的“两步法”预浸渍可以使单位质量底物中葡萄糖占总还原糖的百分比由64．33％上升到96．34％，酶解得率由35．8％上升到83．2％，葡萄糖实际产量提高了1．11倍．研究表明碱强化的离子液体微乳液具有优良的预浸渍处理效果．The effects of the composition, impregnation mode and treatment condition of alkali-strengthened DILMS （ Double Ionic Liquid Microemulsion） on the enzymatic hydrolysis efficiency of eucalyptus were discussed, and the variation of monose content in the residue and the impregnation liquid was analyzed. Moreover, the increment of glucose in the enzymatic hydrolysis process was quantitatively investigated by means of the ion chromatography. Fi- nally, suitable DILMS impregnation conditions, that is, a temperature of 100 ~C, an impregnation duration of 8 h and a substrate size of 40 meshes （namely a diameter of 180 ~ 380 trm）, were determined. Experimental results in- dicate that, by using the alkali-strengthened quadrol （70 ~C, 3 h） impregnation with the DILMS preimpregnation, the glucose proportion in the total reducing sugar increases from 64. 33% to 96. 34%, the enzymatic hydrolysis effi- ciency improves from 35.8% to 83.2%, the actual yield of glucose is 2. 11 times that of the untreated raw mate- rial. It is thus concluded that the alkali-strengthened DILMS is effective in improving the preimpregnation efficiency.

关 键 词：双离子液体 微乳液 乙二胺 酶解 桉木 

分 类 号：S216[农业科学—农业机械化工程]