aCl2辅助高碘酸钠氧化醋酸纤维素的研究

ellulose can be selectively oxidized to dialdehyde cellulose by sodium periodate. This paper focused on CaCl2 assisted oxidation of cellulose acetate with sodium periodate, and the structure of the obtained dialdehyde cellulose acetate was confirmed by FTIR. Moreover, the effects of oxidant concentrations, oxidation temperatures and oxidation time on aldehyde contents and weight loss rates of dialdehyde cellulose acetate were thoroughly investigated, respectively. The results showed that in the case of pH value of 3.5, with the increase of oxidant concentrations, oxidation temperatures and oxidation time, the aldehyde contents of dialdehyde cellulose acetate increased firstly, then it decreased, while weight loss rates of dialdehyde cellulose acetate increased gradually. Most importantly, the introduction of CaCl2 can significantly increase the aldehyde contents of dialdehyde cellulose acetate at the same experiment conditions, which is beneficial to the oxidation of cellulose acetate.