DES/TEMPO法制备纳米纤维素及其性能研究  

Study on preparation and properties of nano-cellulose by DES/TEMPO method

作　　者：李佩燚 雷镐哲 简博星 刘瑞岩 周苗苗 刘鹤震 LI Pei-yi;LEI Hao-zhe;JIAN Bo-xing;LIU Rui-yan;ZHOU Miao-miao;LIU He-zhen(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25-30,64,共7页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅重点实验室开放基金项目(17JS017);陕西省大学生创新创业训练计划项目(S202010708077)。

摘　　要：纤维素纳米纤维(CNF)是一种具有优异性能的纳米材料.豆渣作为一种农业废弃物,其纤维素含量高,木素含量低,可省去常规木材纤维原料的蒸煮工艺,直接提纯纤维素并制备纳米纤维素.本文研究了一种简便的DES预处理方法结合TEMPO氧化制备纳米纤维素的方法.结果表明,TEMPO氧化后的纳米纤维素(TOCN)平均粒径为13.1 nm,粒径分布均匀,羧基含量高(1.723 mmol/g纤维).与DES预处理纤维素纤维(DCF)相比,紫外线透过率提高约50%,有更好的分散性.总体而言,豆渣CNF的简易和低成本制备为纳米纤维素的开发提供了一个便捷选择.Cellulose nanofibers(CNF)is a nano material with excellent properties.Okara is an agricultural waste with high cellulose content and low lignin content,which can purified cellulose to prepare nanocellulose without the cooking process of wood fiber materials.In this study,a simple DES pretreatment method combined with TEMPO oxidation to prepare CNF was reported.The results showed that the TEMPO oxidized nanocellulose(TOCN)with uniform particle size distribution and average particle size of 13.1 nm has high carboxyl content(1.723 mmol/g cellulose).TOCN was contrasted with DES pretreatment cellulose fiber(DCF),the UV transmittance is increased by about 50%with better dispersibility.In general,the simple and low-cost preparation of okara CNF provides a convenient option for the development of nanocellulose.

关 键 词：豆渣 低共熔溶剂(DES) 纳米纤维素(CNF) TEMPO氧化 

分 类 号：TQ352.6[化学工程]