H_2O_2固相氧化法合成氧化淀粉及微波催化

Oxidized Starch Synthesized Using H_2O_2 as Oxidizer in Dry Process and Microwave Catalysis

用双氧水作氧化剂固相法合成了氧化淀粉。考察了催化剂及其用量、反应温度、反应时间、水量、双氧水的用量、微波等条件对氧化程度的影响。实验结果表明适宜的反应条件为:淀粉∶Cat3∶水量的质量为100∶0 5∶10,70℃反应5h;改变双氧水用量可以得到不同羧基含量的氧化淀粉;微波能大大加快反应速度,反应时间只需几分钟。

Oxidized Starch was synthesized using hydrogen peroxide as oxidizer in dry process.The effect of the amount of catalyst,reaction temperature,reaction time,amount of water and microwave radiation on the degree of oxidation was investigated.Experimental results showed that the suitable condition was that the weight ratio of starch∶Cat3∶water was 100∶05∶10;reaction time 5 hours at 70℃.Oxidized Starch with different carboxyl group contents could be obtained by using different amount of H2O2.Microwave radiation could greatly speed up the reaction rate.The reaction time needed was just a few minutes.