复合纤维素酶预处理对漂白麦草纤维结构的影响  

Effect of composite cellulase pretreatment on the structure of bleached wheat straw fiber

作　　者：陈帅[1] 李新平[1] 杜敏[1] 王志杰[1] 陈立红[2] 

机构地区：[1]陕西科技大学轻工与能源学院、陕西省造纸技术及特种纸品开发重点实验室,西安710021 [2]陕西科技大学化学与化工学院,西安710021

出　　处：《功能材料》2015年第8期8090-8093,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(31370578);陕西省自然科学基础研究计划资助项目(2014JZ013);陕西省科技厅省级重点实验室资助项目(2011HBSZS014);陕西科技大学科研启动基金资助项目(BJ13-21)

摘　　要：针对纤维素微纤丝(CMF)制备所需要高能耗的问题,以漂白麦草纤维为原料,利用SEM、FT-IR、XRD等研究复合纤维素酶预处理对漂白麦草纤维结构的影响;对酶处理后纤维的微观形貌、化学结构和结晶结构进行了分析与表征。结果表明,随着酶用量的增大,酶处理后的纤维表面变得疏松多孔,细胞壁表层脱落,直至纤维被切断,纤维素结晶度发生了先增加后降低,再增加再降低的周期性变化,纤维素平均聚合度逐渐减小;酶处理后纤维素没有引入新的官能团,纤维仍具有纤维素的基本化学结构,纤维素基本保持了天然植物纤维素的晶型。Aiming at the problem of high energy consumption in the preparation of cellulose microfibril( CMF),bleached wheat straw were used as raw materials,SEM,FT-IR,XRD and other methods were used to study the structure of bleached wheat straw fiber pretreated by composite cellulase. After enzymatic hydrolysis,the morphology,chemical structure and crystalline structure of the fibers were analyzed and characterized. The results showed that with the increase of enzyme dosage,the fiber surface became porous and cell wall surface fell off until the fibers were cut; Cellulose crystallinity changed periodically,which first increased then reduced,once again increased then reduced,the average DP of cellulose reduced gradually. The new functional groups were not introduced into the cellulose,and the fiber still had a basic chemical structure of the cellulose; The cellulose's crystalline form of the natural fiber was remained substantially after enzymatic hydrolysis.

关 键 词：复合纤维素酶 漂白麦草纤维 酶水解 纤维素结晶度 纤维素平均聚合度 

分 类 号：TQ353[化学工程]