玉米芯纤维素的绿色高效提取及其特性研究  

Study on green and efficient extraction of corncob cellulose and its characteristics

作　　者：王建 张瑞敏 权彩琳 邵心怡 刘泽覃 胡娜 姚昕杰 WANG Jian;ZHANG Rui-min;QUAN Cai-lin;SHAO Xin-yi;LIU Ze-tan;HU Na;YAO Xin-jie(College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi′an 710021, China)

机构地区：[1]陕西科技大学轻工科学与工程学院轻化工程国家级实验教学示范中心,陕西西安710021

出　　处：《陕西科技大学学报》2022年第1期19-24,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21978161)。

摘　　要：玉米芯是一种农林废弃物,实现其高值化利用的途径之一是组分分离.利用低浓对甲苯磺酸(p-TsOH)预处理脱除玉米芯半纤维素,然后利用高浓p-TsOH处理提取玉米芯纤维素,考察了p-TsOH浓度、反应温度和反应时间对玉米芯纤维素纯度和得率的影响,并且采用SEM、FT-IR、XRD对玉米芯纤维素进行了表征分析.研究表明,经过低浓p-TsOH预处理,半纤维素的脱除率达92.44%;玉米芯纤维素的最佳提取工艺为p-TsOH浓度为80 wt%、反应温度为80℃、反应时间为60 min,此时玉米芯纤维素的得率为34.07%、纤维素纯度为88.47%,并且呈现多孔的棒状结构,结晶度为60.99%.Corncob is an agricultural residue,one of the ways to achieve its high-value utilization is component separation.Low-concentration p-toluenesulfonic acid(p-TsOH)was used to remove corncob hemicellulose,then high-concentration p-TsOH was used to extract corncob cellulose.The effects of p-TsOH concentration,reaction temperature and reaction time on the purity and yield of corncob cellulose were investigated,and SEM,FT-IR and XRD were used to characterize corncob cellulose.The results showed that after low-concentration p-TsOH pretreatment,the removal rate of hemicellulose reached 92.44%;the optimal extraction process of corncob cellulose was that the concentration of p-TsOH was 80 wt%,the reaction temperature was 80℃,and the reaction time was 60 min.And under this condition,the yield of corncob cellulose was 34.07%,and its purity was 88.47%.The corncob cellulose exhibited a rod-like porous structure,and its crystallinity was 60.99%.

关 键 词：纤维素 对甲苯磺酸(p-TsOH) 玉米芯 组分分离 

分 类 号：TQ352.7[化学工程]