微波法制备醋酸酯淀粉的工艺及其性能的研究

以玉米淀粉为原料,以醋酸酐为乙酰化试剂,氢氧化钠为催化剂,利用微波辐射技术对醋酸酯淀粉的合成工艺和性能进行了研究。通过正交试验得到了微波法制备醋酸酯淀粉的最佳工艺为:醋酸酐用量80%,加水量2g,辐射时间5min,辐射功率200W。此条件下醋酸酯淀粉的取代度为0.1386。利用RVA快速黏度分析仪、红外光谱仪、扫描电子显微镜对其性能进行了研究。

Study on Preparation of Starch Acetate by Microwave and Its Properties

With the corn starch as a raw material, the acetic anhydride as the acetylize reagent and the sodium hydroxide as the catalyst, the starch acetate synthesis process test are its properties wer studied. The optimum conditions confirmed by orthogonal: the acetic anhydride amount 80%, water amount added 2 g, radiation time 5 min, radiation power 200 W. On these conditions degree of substitution is 0.1386. And by the RVA fast viscosity analyzer, theinfrared light spectrometer and the scanning electron microscope the properties of product were determined.