乙二醇双硬脂酸酯乙氧基化物的合成与性能研究

Synthesis and properties of ethoxy glycol distearate

以乙二醇双硬脂酸酯为原料,在催化剂作用下直接与环氧乙烷(EO)进行加成反应得到具有反Bola结构的乙二醇双硬脂酸酯乙氧基化物的系列产物,通过红外光谱对产物结构进行了表征,并研究了产物的物化性能。实验结果表明,随着EO加合数的增加,产物的浊点升高;临界胶束浓度(cmc)增大,cmc时的表面张力(γcmc)先降低后升高,最低为33.18 mN·m-1;乳化力先增加后降低;去污力提高,当EO加合数为30时,产物的去污力达到93%;泡沫性能较差,为低泡类表面活性剂。

A series of ethoxy glycol distearate product, with anti - Bola structure, was prepared with glycol distearate as starting material and direct catalytic additive reaction of ethylene oxide. Structure of the product was characterized by IR spectrum. Physicochemical properties were investigated. Results showed that following the increase of ethylene oxide content, cloud point, critical micelle concentration （cmc） and detergency increase;surface tension at the cmc （Tcmc） decreases in the beginning,then increase after the lowest value of 33.18 mN· m^- 1. When the addition of EO achieves 30,the detergency achieves 93%. The emulsifying power increases firstly and then reduces later. The foaming power is rather low, so the product belongs to low foam surfactant.