双十八烷基二羟乙基溴化铵的微波合成及性能

以十八烷基二乙醇胺和溴代十八烷通过微波合成技术制备了双十八烷基二羟基溴化铵季铵盐（DODAB）。确定最佳合成工艺条件为：反应物浓度为2.17 mol·L^-1、反应时间为158.61 min、微波功率为626.06 W,在此条件下转化率的预测值为93.71%。产品由IR和¹H NMR进行表征。测定产品的表面活性为：CMC=0.501 g·L^-1,表面张力为30.27 mN·m^-1,优于阳离子表面活性剂D1821。测定产品应用于织物的柔软性能,结果显示：DODAB的柔软效果与D1821相当,随着处理的次数增多,DODAB处理后的柔软效果虽比D1821稍微弱一些,但其手感上会更为自然,更为舒适。同时,DODAB较D1821有着更好的维持织物白度性能的效果,具有较好的抗黄变能力。

Microwave synthesis and properties of dioctadecyldihydroxyethyl ammonium bromide

Dioctadecyldihydroxyethyl ammonium bromide (DODAB) was prepared by microwave synthesis of octadecyldiethanolamine and bromooctadecane. The optimum synthetic conditions were determined as follows: the concentration of reactant was 2.17 mol·L^-1, the reaction time was 158.61 min, and the microwave power was 626.06 W. Under these conditions, the predicted conversion was 93.71%. The product was characterized by IR and ¹H NMR. The surface activity of the product is determined as follows: CMC=0.501 g·L^-1, surface tension is 30.27 mN·m^-1, which is better than cationic surfactant D1821. The results show that the softening effect of DODAB is similar to that of D1821. With the increase of treatment times, the softening effect of DODAB treatment is slightly weaker than that of D1821, but its hand feel is more natural and comfortable. At the same time, DODAB is better than D1821 in maintaining fabric whiteness and yellowing resistance.