应用超声波辐射分别研究了甲壳素在水中和乙醇介质中脱乙酰反应 ,并将其与无超声波辐射下甲壳素的脱乙酰反应进行了对比。结果表明 :在水中和乙醇 2种反应介质中超声波可以促进反应 ,在较低的反应温度下即可提高产品脱乙酰度和粘度。但比较而言 ,超声波对水介质中的脱乙酰反应促进作用更加显著 The deacetylation reaction of chitin in water and ethanol was studied by using ultrasonic irradiation. The deacetylation of chitin was compared with that without ultrasonic irradiation. The results show that ultrasonic can promote the reaction in water and ethanol two kinds of reaction medium, and the product deacetylation and viscosity can be improved at lower reaction temperature. In contrast, however, the effect of ultrasound on the deacetylation reaction in aqueous media is even more pronounced