期刊论文

Preparation of sodium carboxymethyl cellulose with high degree of substitution and low viscosity by poplar pulp board

中文

应用化工

1671-3206

2019

48

7

1587-1591

10.16581/j.cnki.issn1671-3206.20190523.088

湖南省科技重大专项（2017NK1013）；

本校为第一机构

以杨木浆板纤维素为原料,通过单因素实验和正交实验,采取预处理工艺和三次碱化两次醚化工艺,并采用超声波和高速剪切分散等辅助手段,制备高取代度羧甲基木质纤维素钠。结果表明,预处理工艺: 70 ℃下用10% NaOH溶液(固液比1∶ 40 g/mL)浸泡搅拌90 min;碱化醚化工艺:室温下首次碱化时间为60 min, 50 ℃下第二次碱化和首次醚化反应时间为30 min,最后在70 ℃下第三次碱化和第二次醚化反应时间为90 min,氯乙酸钠用量∶ NaOH用量∶碱化纤维素用量=1. 4 ∶ 1 ∶ 1 (质量比);经过预处理和三次碱化两次醚化,产品取代度达到1. 33,黏度为404. 0 mPa·s。在碱化醚化过程中,在室温碱化后用高速剪切分散处理10...

Wood pulp board cellulose is used as raw material,pretreatment technology and three times of alkalization and twice of etherification processes are adopted through single factor experiment and orthogonal experiment,and ultrasonic and high-speed shear dispersion are used as auxiliary methods. The preparation of high substitution sodium carboxymethyl lignocellulose were determined,and the results showed that the pretreatment process was that soaking and stirring lasted for 90 min with 10% sodium hydroxide solution (solid-liquid ratio 1∶ 40) at 7...