摘要
以福建毛竹为原料,经过四次加碱法制备羧甲基纤维素(CMC),并通过FTIR、XRD、TGA、SEM手段对原料与产品的结构和性能进行表征。结果表明,制备CMC的最佳工艺条件为:精制毛竹5 g,氢氧化钠6 g,氯乙酸6 g,乙醇质量分数为85%,第一次碱化温度为30℃,时间为90 min,氢氧化钠加入量为总质量的80%;后三次碱化是在醚化过程中平均加入剩余20%的碱,醚化最终温度为70℃,醚化总时间为3 h。在此工艺条件下,所得到的CMC的取代度为0.9137,黏度为37 mPa.s。
In this study carboxymethyl cellulose was successfully synthesized from moso bamboo of Fujian using four alkali-adding method. The raw material and products were characterized by FTIR, XRD, TGA and SEM. The results showed that the optimal preparation conditions were pretreated cellulose 5 g, sodium hydroxide 6 g, chloroacetic acid 6 g, ethanol concentration 85%, first basification temperature and time were 30℃ and 90 rain with 80% of total sodium hydroxide, the remaining 20% was averagely divided into three parts to react during the etherification process, final etherification temperature and total etherification time were 70℃ and three hours. Under the optimized reaction conditions, the substituting degree of carboxymethyl cellulose obtained reached 0.913 7 and the viscosity was 37 mPa·s.
出处
《纤维素科学与技术》
CAS
CSCD
2013年第2期53-58,62,共7页
Journal of Cellulose Science and Technology
关键词
毛竹
羧甲基纤维素
取代度
羧甲基化
moso bamboo
carboxymethyl cellulose
degree of substitution
carboxymethylation
