【摘要】 主要研究了干法制备高取代度阳离子淀粉的方法 ,将玉米原淀粉和适量的碱催化剂在混合容器中混合均匀后 ,再加入 3 氯 2 羟丙基三甲基氯化铵阳离子醚化剂 ,在温度为 6 0～ 80℃时 ,反应 5h ,用乙醇溶液浸泡、过滤、洗涤、真空干燥 ,制得高取代度阳离子淀粉 ,用其作为阴电荷中和剂可提高填料留着率。在造纸过程中具有显著的助留效果 ,且用量明显减少更多还原

【Abstract】 This paper deals with the preparation of the cationic starch with high degree of substitute by dry-process The corn starch and the alkali catalyst are mixed in the mixer, the reaction is conducted for 5 ho urs at the temperature of 70℃ after adding the cationic etherfying agent(N-(3 -chloro-2-hydroxypropyl)trimethylammonium chloride).The cationic starch with high degree of substitute which can be used as anionic charge neutralizing agent s to improve filler retention is produced.The experiments show that the kind of c ationic starch have remarkable effect on filler retention in papermaking process and its dosages can be decreased.更多还原