【摘要】 增溶剂聚氧乙烯蓖麻油EL—40(Ⅰ)与吐温80(Ⅱ),于胶团状态下,可进行水解,呈伪一级反应,受特殊酸碱催化,于pH6附近较稳定,且Ⅰ稳定性优于Ⅱ。增溶后位于胶团中心的维生素E,由于相互作用使Ⅰ、Ⅱ水解均加快。更多还原

【Abstract】 The kinetics of hydrolysis of polyoxyethylene castor oil EL-40 and Tween 80 in solutions at 55℃. were studied. Each of these solubilizers was degradated by a pseudo-first order reaction. The hydrol-ysis appeared to be catalysed by specific acid-base and pH of maximum stability for each in solution was 6 at 55℃. Polyoxyethylene castor oil EL-40 was more stable than Tween 80.The effect of solubilizate vitamin E on the degradation of both solubilizers were investigated. The location of vitamin E within the micelle was determined by solubility method. On the basis of the results, it was suggested that vitamin E might penetrate into the corn position of the micelle and reve aled a promoting degradative effect.更多还原