纤维素科学与技术2025，Vol.33Issue(2)：39-49,11.DOI:10.16561/j.cnki.xws.2025.02.07
青龙衣纤维素的低共熔溶剂法提取及其结构表征
Extraction and Structural Characterization of Walnut Green Husk Cellulose by Deep Eutectic Solvent
摘要
Abstract
Using the by-product of walnut,Qinglongyi,as raw material,the process conditions of extracting cellulose from Qinglongyi by DES method were optimized by single factor test combined with Box-Behnken response surface method.The experimental results showed that the optimal extraction conditions were as follows.The optimal DES solvent system consisted of choline chloride and oxalic acid at a molar ratio of 1∶2.The optimized extraction parameters were determined as follows:an extraction time of 4.2 h,an extraction temperature of 107℃,and a solid-liquid ratio of 1∶14(g/mL).Under the optimized conditions,the yield of cellulose extracted from Qinglongyi was determined to be 43.45%±1.15%,which was basically consistent with the predicted value of 44.38%.The extracted Qinglongyi cellulose was characterized,and its Mw was 1.962×106 Da;FTIR results showed that the concentration of hemicellulose and lignin decreased significantly.SEM and AFM results showed that the surface of cellulose was rough after DES treatment.EDX analysis confirmed that Qinglongyi cellulose was mainly composed of carbon,hydrogen and oxygen,which was harmless to the environment.XRD analysis showed that the extracted Qinglongyi cellulose was type I crystalline structure and belonged to natural cellulose.TG analysis showed that Qinglongyi cellulose had good thermal stability.IC results showed that the purified natural Qinglongyi cellulose was mainly composed of glucose with a purity of 87.31%.In summary,Qinglongyi is a feasible source of cellulose and has broad potential in various application fields.关键词
青龙衣/纤维素/低共熔溶剂/结构表征Key words
Qinglongyi/cellulose/deep eutectic solvent/structural characterization分类
化学引用本文复制引用
刘营飞,薛雪,高波,郭玉婷,魏有鸿,杜双,唐辉,廖兵武..青龙衣纤维素的低共熔溶剂法提取及其结构表征[J].纤维素科学与技术,2025,33(2):39-49,11.基金项目
新疆植物药资源利用教育部重点实验室主任基金(2021QDJF002) （2021QDJF002）
石河子大学创新发展专项(CXFZ202219) （CXFZ202219）
新疆维吾尔自治区天池英才青年博士项目(CZ000904). （CZ000904）
