用木屑制备羧甲基纤维素  

Preparation of Carboxymethyl Cellulose from Bits of Wood

作　　者：夏士朋[1] 

机构地区：[1]淮阴师范学院化学系,江苏淮安223300

出　　处：《淮阴师范学院学报（自然科学版）》2004年第3期236-239,共4页Journal of Huaiyin Teachers College;Natural Science Edition

摘　　要：研究了以木屑为原料制备羧甲基纤维素.最佳条件为:纤维素(g)∶NaOH(g)∶氯乙酸(g)=1.0∶1.1∶1.2;以85%乙醇为溶剂,碱化温度为30～35℃,时间为60～90min;醚化温度为70℃,时间为150～180min;产品的粘度大于550mPa·s,取代度大于0.65,有效成分大于85%,氯化物小于3%.A method of preparing carboxymethyl cellulose (CMC) from bits of wood is reported. Best reaction conditions are as follows: The quality ratio among cellulose and sodium hydroxide and chloroacetic acid is 1.0:1.1:1.2;Alkalization temperature is 30～35℃ for 60～90 min and etherification temperature 70℃ for 150～180 min. with the ethanol(W(C_2H_5OH)=85%) as solvent; Viscosity of CMC is above 550 mpa.s, degree of substitution above 0.65, mass fraction of available composition above 85%,and the content of chloride below 3%.

关 键 词：木屑 制备 羧甲基纤维素(CMC) 

分 类 号：TQ352.79[化学工程]