微波法制备阳离子纤维素工艺的研究

Etherification Process of Bagasse Pulp by Usin Microwave

以漂白硫酸盐蔗渣浆和醚化剂3-氯-2-羟丙基三甲基氯化铵(CHPTMA)为原料,用微波作为加热方式合成阳离子纤维素,探讨了CHPTMA用量、NaOH用量、体系含水量、微波功率和微波时间等因素对产物取代度和Zeta电位的影响,确定了较优的合成条件:醚化剂与纤维素质量比0.45,NaOH与醚化剂质量比4.45,微波时间9 min,微波功率400 W,体系含水量60%。此条件下制备的蔗渣阳离子纤维素的取代度可达0.192,Zeta电位为25.6 mV。通过红外光谱图分析证明,已经合成了具有阳离子官能团的纤维素。

Cationic cellulose was synthesized by using bagasse bleached kraft pulp and 3-chloro-2-hydroxy propyl trimethyl ammonium chloride（CHPTMA） as raw material and using microwave heating.The optimal synthesis conditions were determined： quality ratio of etherifying agent and cellulose 0.45,quality ratio of NaOH and etherifying agent 4.45,microwave heating time 9 minutes,microwave power 400 W,water content of the system 60%.The substitution degree of the resultant bagasse cationic cellulose is 0.193,and Zeta potential is 25.6 mV.The infrared spectra proves that this method can synthesise the cellulose containing cationic functional group.