双正辛酸酯基酒石酸钠的合成条件优化及性能评价

以正辛酸、酒石酸为原料,通过两步反应合成了双子表面活性剂双正辛酸酯基酒石酸钠(DCTS)双子表面活性剂,考察了反应时间、反应物料比对中间产物及目标物产率的影响,得到中间产物的最佳反应条件是:反应时间2 h,氯化亚砜与正辛酸物质的量之比为1.2∶1;目标物的最佳反应条件是:反应时间6 h,正辛酰氯与酒石酸物质量之比为2.1∶1。测定了其在不同浓度下的表面张力,得到目标物水溶液在20℃的表面活性数据为:超临界胶束浓度为12 mmol/L,表面张力为27.6 mN/m。

Reaction condition optimization and performance evaluation of DCTS

Using n-caprylic acid and tartaric acid as raw materials,gemini DCTS was synthesized by two reaction steps.The factors of amount of materials,reaction time and the yield of target product were studied.The optimum conditions of intermediate product were as follows:reaction time 2 h,n[CH3(CH2)6COOH] ∶n(SOCl2)=1 ∶1.2.The optimum conditions of target product: reaction time 6 h,n[CH3(CH2)6COCl] ∶n(tartaric acid)=2.1 ∶1.The Ccmc value of aqueous solution of DCTS is 12 mmol/L,the γcmc of the product is 27.6 mN/m.