以棉籽壳为原料合成纤维素氨基甲酸酯的研究  

Study on the synthesis of cellulose carbamate from cotton seed hull

作　　者：张祥坤 张海燕[1] 尤厚美 李仲 陈明鸽[1,2] ZHANG Xiangkun;ZHANG Haiyan;YOU Houmei;LI Zhong;CHEN Mingge(College of Life Sciences,Tarim University,Alar,Xinjiang 843300;Engineering Laboratory of Chemical Resources Utilization in South Xinjiang,Xinjiang Production&Construction Corps.Alar,Xinjiang 843300)

机构地区：[1]塔里木大学生命科学学院,新疆阿拉尔843300 [2]新疆兵团南疆化工资源利用工程试验室,新疆阿拉尔843300

出　　处：《塔里木大学学报》2021年第4期36-44,共9页Journal of Tarim University

基　　金：国家自然科学基金项目“基于超分子组装原理二维层状蛭石剥离与组装机理研究”(21761029);新疆生产建设兵团中青年科技创新领军人才项目“层状蛭石纳米复合材料的制备和性能的研究”(2020CB019)。

摘　　要：本研究以棉籽壳为原料,采用酸煮法提取棉籽壳上的纤维素,再经尿素浸泡,在高温反应体系中制备纤维素氨基甲酸酯。通过单因素试验研究NaOH浓度、活化时间、尿素浓度、尿素浸泡和酯化时间对纤维素氨基甲酸酯制备的影响。结果表明:使用质量分数为20%的NaOH溶液活化4.0 h,质量分数为40%的尿素溶液浸泡2.0 h,酯化3.0 h时为制备纤维素氨基甲酸酯的最佳工艺条件,该工艺条件下制备纤维素氨基甲酸酯的含氮量可达1.6%以上。In this study,cottonseed hulls were used as raw materials to extract cellulose from the cottonseed hulls by acid cooking,and then soaked in urea to prepare cellulose carbamate in a high-temperature reaction system.The effects of NaOH concentration,ac-tivation time,urea concentration,urea soaking time and esterification time on the preparation of cellulose carbamate were studied by single factor test.The results showed that the optimum conditions for the preparation of cellulose carbamate were as follows,the cel-lulose was activated with 20%NaOH solution for 4.0 h,40%urea soaking for 2.0 h,and esterification for 3.0 h,The nitrogen con-tent of cellulose carbamate can reach more than 1.6%.

关 键 词：棉籽壳 分离 纤维素 纤维素氨基甲酸酯 

分 类 号：TQ352.71[化学工程]