微波辐射合成顺丁烯二酸单淀粉酯

Study on the synthesis of starch maleat ester in microwave

以木薯淀粉为原料,顺丁烯二酸酐为酯化剂,在微波条件下合成了顺丁烯二酸单淀粉酯.着重研究了淀粉与酸酐的摩尔比、碳酸钠的用量、水的用量、反应时间、微波功率对产物取代度的影响.结果表明:当淀粉用量为10 g、淀粉与酸酐的摩尔比为1:0.5、碳酸钠加入量为0.6 g、水的加入量为8 g、反应时间为4 min、微波功率为400 W时,可以得到取代度为0.369的酯化产物.

The starch maleat ester was prepared from tapioca starch by esterification with maleic anhydride with microwave irradiation.It mainly discussed the influence of several important parameters to the product.These parameters were the molar ratio of tapioca starch to maleic anhydride,the amount of Na2CO3,the amount of water,and the reaction time as well as the power of microwave.It has been observed that the degree of substitution（D） was 0.369 when tapioca starch was 10 g,the molar ratio of starch to maleic anhydride was 1：0.5,Na2CO3 was 0.6 g,water was 8 g,reaction time was 4 min,and microwave power was 400 W.