微波辅助与传统加热法合成植物油淀粉酯

Conventional Heating and Microwave- assited Synthesis of Vegetable Oil Starch Ester

以植物油和预处理玉米淀粉为反应底物,利用脂肪酶分别在微波辅助和传统加热的方式下催化合成植物油淀粉酯。通过筛选不同反应底物,探究影响合成植物油淀粉酯反应的因素,并考察反应时间、反应温度、植物油添加量、反应转速及微波功率对酯化反应的影响。结果表明,在单因素试验的基础上,传统加热的最佳反应条件为反应温度65℃,反应时间20 h,植物油添加量20 g,反应转速200 r/min,取代度可达0.033 4;微波辅助的最佳反应条件为反应温度60℃,反应时间3 h,植物油添加量20 g,微波功率240 W,取代度可达0.036 2。

With vegetable oil and pretreatment of corn starch as substrate, synthesis of plant oil starch ester by lipase are investigated under microwave irradiation and conventional heating mode. On the different substrates are screened, and the influence factors in the synthesis of vegetable oil starch ester reaction is discussed, the reaction time, the reaction temperature,adding the amount of vegetable oil,reaction speed and effect of microwave power on the esterification reaction.On the basis of single factor, the optimum reaction conditions of traditional heating 65 ℃ of reaction temperature, 20 h of reaction time,20 g of vegetable oil content,the reaction speed of 200 r/min. Substitution degree can be up to 0.033 4. The best microwave assisted reaction conditions are as follows 60 ℃ of reaction temperature, 3 h of reaction time, 20 g of vegetable oil content,microwave power 240 W. Substitution degree can be up to 0.036 2.