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先采用二乙二醇和葡萄糖合成二乙二醇葡萄糖苷,以此为起始物,再与环氧丙烷(PO)反应,得二乙二醇葡萄糖苷聚氧丙烯醚,研究了催化剂用量、温度、压力、n(PO)/n(二乙二醇葡萄糖苷)等因素对反应及产物理化性能的影响。结果表明,适宜的合成工艺条件为:催化剂用量1.5%、温度125~135℃、压强0.2~0.3 MPa,在上述条件下反应速率较快。当聚合进料比n(PO)/n(二乙二醇葡萄糖苷)为13,制备产物的表面活性最高,其表面张力最低可达37.5 m N?m-1,产物乳化性能优良,可应用在低泡表面活性剂领域。
Diethylene glycol glucoside was first synthesized by using diethylene glycol and glucose as the starting material and then reacted with propylene oxide (PO) to obtain polyoxyethylene glycol diglycidyl ether. The effects of catalyst dosage, temperature , Pressure, n (PO) / n (diethylene glycol glucoside) and other factors on the reaction and physical and chemical properties of the product. The results showed that the suitable synthesis conditions were: catalyst dosage 1.5%, temperature 125 ~ 135 ℃, pressure 0.2 ~ 0.3 MPa, under the above conditions, the reaction rate was faster. When the feed ratio of n (PO) / n (diethylene glycol glucoside) is 13, the surface activity of the prepared product is the highest, and the lowest surface tension is 37.5 mN? M-1. The product has excellent emulsifying property and can be applied In the field of low foam surfactants.