稻草乙醇浆纳米纤维素的性状分析  

Preparation of Nanocellulase from Alcohol Straw Pulp

作　　者：刘裕杰 平清伟 李娜 张健 盛雪茹 LIU Yujie;PING Qingwei;LI Na;ZHANG Jian;SHENG Xueru(School of Light Industry and Chemical Engineering,Dalian Polytechnic Universty,Dalian,Liaoning Province,116034)

机构地区：[1]大连工业大学轻工与化学工程学院

出　　处：《中国造纸》2019年第8期29-33,共5页China Pulp & Paper

基　　金：国家自然科学基金项目（项目编号：31270634）

摘　　要：以稻草为原料制备稻草乙醇浆,再采用酸水解-超声法制备稻草乙醇浆纳米纤维素,对稻草乙醇浆纳米纤维素性状进行分析。结果表明,稻草经乙醇-水溶液蒸煮及OPDEP漂白后,漂白浆在硫酸质量分数54%、液比1︰16、60℃下水解60min以及在硫酸质量分数56%、液比1︰18、60℃下水解60min,然后经800W超声处理20min,分别制得最高得率和最高结晶度的稻草乙醇浆纳米纤维素;经X射线衍射(XRD)分析,发现稻草乙醇浆纳米纤维素是典型的纤维素Ⅰ型结晶结构;扫描电子显微镜(SEM)观察其宽度约为10~30nm,长度100~500nm;粒径分析发现其90%以上的粒径基本分布在20~50nm;热稳定性分析发现,样品的热降解过程为180~240℃、240~320℃、320~480℃三个主要阶段。Straw nanocellulose was prepared by means of acid hydrolysis-ultrasonic method using bleached alcohol straw pulp as raw materi?al.At 54%sulfuric acid concentration,liquid ratio 1︰16,hydrolysis was carried out at 60℃for 60 minutes,or at 56%sulfuric acid concen?trated,liquid ratio 1︰18,hydrolysis was implemented at 60℃for 60 minutes,followed by ultrasonic treatment at 800 W for 20 minutes,the nanocellulose with the highest yield and highest crystallinity was prepared which exhibited typical cellulose I type crystal structure and had short rod structure under SEM observation.Its width was about 10~30 nm,length from 100~500 nm.Particle size analysis found that more than 90%particle radius distribution was basically in between 20~50 nm.The thermal stability analysis found that the degradation of the sample took place in three main processes of 180~240°C,240~320°C,and 320~480°C.

关 键 词：稻草 乙醇法制浆 纳米纤维素 

分 类 号：TS72[轻工技术与工程—制浆造纸工程]