聚阴离子纤维素合成工艺

A Study on the Technology of Synthesizing Polyanionic Cellulose

摘要:

研究了溶剂法合成聚阴离子纤维素（ＰＡＣ）过程中游离碱浓度、氯乙酸钠水解率和产品取代度及其溶液粘度与反应条件的关系。选用低极性异丙醇／水（体积比９／１）溶剂，能有效地抑制氯乙酸钠的水解从而获得较高的产品取代度和氯乙酸利用率。合成过程中加入表面活性剂有利于提高反应的均匀性，使产品抗盐性增强。

Abstract:

The dependence of concentration of free sodium hydroxide,hydrolyzation ratio of sodium chloroacetate,degree of substitution(DS)and solution viscosity of product on reaction conditions in the synthesis of polyanionic cellulose (PAC)in various alcohol mediu