【摘要】 讨论了干法制备阳离子淀粉工艺中阳离子试剂、催化剂用量及反应温度、反应时间等因素对取代度和反应效率的影响。研究表明最佳工艺条件是:淀粉、醚化剂及NaOH加入量的质量比为50∶18∶5,淀粉含水量为34%,反应温度60℃,时间5h,可以制备出取代度为0.289,反应效率为75%的高取代度阳离子淀粉。更多还原

【Abstract】 This paper discussed the effect of cationic agent and catalyst dosages, reaction temperatureand reaction time on the degree of substitution and reaction efficiency of cationic starch prepared by dry process. The results show that a cationic starch with a DS of 0.289 is prepared when the reaction of starch ,etherifying agent and the sodium hydroxide at a mass ratio of 50 ∶18 ∶5 is carried out at 60 ℃ for 5 h and the amount of water in starch is 34%. The reaction efficiency is 75%.更多还原