一种新脂肪酸衍生物—辛酸三乙醇胺酯的表面活性研究

Study on the Surface Activity of a Novel FattyAcid Derivative--Triethanolamine Ester ofCaprylic Acid

通过辛酸与三乙醇胺的直接反应,合成了辛酸三乙醇胺酯,经分离、提纯可得单、双及三辛酸酯。单、双脂有较高的表成活性,与一般非离子表面活性剂相当,三乙醇胺酯在水中部分电离为阳离子,故与阴离子表面活性剂(如十二烷基硫酸钠)有较强的相互作用,其混合体系有很好的表面活性(高于三乙醇胺酯本身)。

Triethanolamine esters of caprylic acid had been synthesized by the reaction of caprylic acid with triethanolamine. The crude product was chromatographically separated and purified to obtain the mono - ,di- and tri - caprylic acid esters. The mono -and di -ester have a higher surface activity .being equivalent to that of a nonionic surfactant. The triethanolamine ester partially ionized to cation in water,thus there was a strong interaction between it and anionic surfactant, showing excellent surface activity which is higher than that of triethanolamine ester itself.