【摘要】 在高碘酸氧化纤维素的非均相反应体系中加入添加剂 ,将传统的非均相反应时间缩短 ,同时提高了反应温度。文中考察了添加剂的用量及反应温度对反应的影响。实验结果显示 ,不同的添加剂有不同的最佳用量 ,反应温度可提高到 40℃。与均相法比较 ,改进的非均相方法具有操作简单 ,所用试剂种类少 ,对试剂要求低 ,后处理容易等特点。更多还原

【Abstract】 The oxidation of cellulose with periodic acid was improved by using the additives under heterogeneous method. The effects of the experimental conditions, such as the additives and their quantities and the reaction temperature, were investigated. The results show when the degree of oxidation is 100%, the reaction temperature is raised to 30~40 ℃ and the reaction time is shortened to 40 h. The temperature is 4 times higher and the time is 8 times less than that of conventional heterogeneous method. Compared to homogeneous method, the method has several advantages that are easy to operate, specially in the step of after treatment, and rapid to carry out the reaction by using small quantities of additives.更多还原