十二烷基二甲基-2-羟乙基氯化铵在乙腈做溶剂下的合成及表面活性测定

The Synthesis of Dimethyl Dodecyl Hydroxyenthyl Aminium Chloride in Acetonitrile Solvent and Its Surface Activity Measurement

季铵盐阳离子表面活性剂具有良好的吸附性和杀菌性[1],乳化和增稠效果明显,广泛用于化工、医学等领域。本文利用N,N-二甲基十二烷基胺和氯乙醇合成了十二烷基二甲基-2-羟基氯化铵,并测定了其在水中的cmc值为13.2mmol/L,此cmc值对应的表面张力值为28.3mN/m。合成的产物十二烷基二甲基-2-羟基氯化铵由于其基团中增加了亲水的羟基,亲水性增高,并且能表现出良好的表面活性。

Because of its good capacity in absorption,bactericidal,emulation and thickening,quarternary ammonium cationic surfactants was widely used in many industial sectors.In this work,the dimethyl dodecyl hydroxyethyl ammonium chloride was synthesized by N,N-dimethyl dodecyl amine and chlorine ethanol.The cmc of the compound is 13.2mmol/L,and the corresponding surface tension is 28.3mN/m.The good surfactant ability is much associated with the hydroxyl added into the compound which increases the hydrophilic ability.