新型甘露醇基凝油剂的制备及性能研究

Preparation and Properties of a Novel Mannitol-Based Oil Gelator

通过甘露醇和环己酮的缩酮反应,合成了具有相选择性的新型糖基凝油剂-环己酮缩甘露醇。考察了反应时间、催化剂用量、分子筛用量、底物配比等多个因素对产物产率的影响。结果表明,分子筛用量为12g、催化剂用量为0.8g、环己酮与甘露醇摩尔比为6.2∶1的条件下反应1h,产率为52%。对所制备的环己酮缩甘露醇的凝油能力测试表明,它可以凝固汽油、硅油等多种油类,柴油、汽油和硅油凝固的最小浓度分别为0.74(wt)%、2.70(wt)%和0.39(wt)%。

A novel mannitol-based oil gelator was synthesized from cyclohexanone and mannitol through ketal reaction. Factors including reaction time,weight of catalyst,weight of molecular sieve,the ratio of the reactants that influenced on the reaction yield were studied. Under the optimal conditions,that is,12 g molecular sieve,0. 8 g catalyst,the mole ratio of cyclohexanone to mannitol 6. 2∶ 1,and the reaction time 1 h,52% yield of oil gelator can be achieved. The test of the gelation ability of as-synthesized sugar-based gelator indicated that it can gel several solvents like petrol and silicone oil. The critical gelation concentrations for diesel,petrol and silicone oil were 0. 74（ wt） %,2. 70（ wt） % and 0. 39（ wt） %,respectively.