摘要
为了拓宽天然低共熔溶剂预处理原料的范围、深入研究预处理机理,考察了5种不同天然低共熔溶剂和预处理条件对麦秸预处理和酶水解效果的影响,并采用傅里叶变换红外光谱仪(FT-IR)、X射线衍射分析仪(XRD)以及扫描电子显微镜(SEM)分析了预处理前后麦秸的化学结构、晶体结构及表面形貌。结果表明,在90℃、12 h的预处理条件下,氯化胆碱∶乳酸(摩尔比为1∶2)可去除49%的木质素和80%的聚木糖;预处理残渣酶水解72 h后,94%的纤维素转化为葡萄糖、70%的聚木糖转化为木糖。氯化胆碱∶乳酸通过切断酯键、醚键去除木质素和聚木糖,以提高酶水解效率。
In order to broaden the range of raw materials for natural deep eutectic solvent(NDES)pretreatment and in-depth study the pretreatment mechanism,the effects of five kinds of NDESs and pretreatment conditions on pretreatment and enzymatic hydrolysis were investigated.The chemical structure,crystalline structure,and surface morphology of wheat straw before and after pretreatment were also analyzed by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),and scanning electron microscope(SEM).Typically,choline chloride∶lactic acid(molar ratio is 1∶2,C∶L)could remove 49.0%lignin and 80.4%xylan(90℃,12 h).After enzymatic hydrolysis for 72 h,93.9%cellulose was converted to glucose and 69.0%xylan was converted to xylose,respectively.C∶L removed the lignin and xylan by breaking the ester and ether bond to enhance enzymatic hydrolysis efficiency.
作者
李冉冉
刘天旺
艾心雨
韩名硕
孙晓然
赵峥
LI Ranran;LIU Tianwang;AI Xinyu;HAN Mingshuo;SUN Xiaoran;ZHAO Zheng(College of Chemical Engineering,North China University of Science and Technology,Tangshan,Hebei Province,063210)
出处
《中国造纸学报》
CAS
CSCD
北大核心
2022年第S01期140-148,共9页
Transactions of China Pulp and Paper
基金
河北省科技厅项目(20373805D)
河北省属高校基本科研业务费(JQN2022011)
大学生创新训练计划项目(X2021123)
关键词
天然低共熔溶剂
氯化胆碱
麦秸
预处理
酶水解
natural deep eutectic solvents
choline chloride
wheat straw
pretreatment
enzymatic hydrolysis
作者简介
李冉冉,女,在读本科生,主要研究方向:生物质预处理;通信联系人:赵峥,副教授,主要研究方向:生物质高值转化与利用,E-mail:buctzhaozheng@163.com。
