精氨酸月桂基酯表面活性剂的合成与应用

Synthesis and application of arginine lauryl ester surfactant

氨基酸基表面活性剂具有无毒、绿色、可降解的特点,在表面活性剂工业中发挥着重要的作用。以L-精氨酸与月桂醇为原料,一步法合成了精氨酸月桂基酯阳离子表面活性剂(ALE),利用正交实验考察了反应条件对产物收率的影响,在最优工艺反应温度110℃,精氨酸与盐酸的摩尔比为1∶1.2,精氨酸与月桂醇的摩尔比为1∶6,反应时间6小时,产物收率为89.7%,并对其结构进行了表征。性能方面主要对其相关的表面化学性能、应用性能(泡沫、乳化、润湿、抑菌及缓蚀性)进行了测试,相对于十二烷基三甲基氯化铵(DTAC),ALE具有较好的表面活性、泡沫性能和抑菌活性,较差的乳化和润湿性,同时ALE对碳钢具有较强的缓蚀性能,当ALE浓度达到80 mg·L^(-1)时,缓蚀效率为97.4%。

Amino acid surfactants play an important role in surfactant industry as of non-toxic,green and degradable characteristics.Arginine lauryl ester cationic surfactant(ALE)was synthesized from L-arginine and lauryl alcohol in one step.The effect of reaction conditions on the yield was investigated by orthogonal experiment.At the optimal reaction temperature of 110℃,the molar ratio of arginine to hydrochloric acid was 1∶1.2,the molar ratio of arginine to lauryl alcohol was 1∶6,the reaction time was 6 hours,and the yield of ALE was 89.7%.The surface properties and application properties(foam,emulsification,wetting,bacteriostatic and corrosion inhibition)were tested.Compared with dodecyltrimethylammmonium chloride(DTAC),ALE had good surface activity,foam and antibacterial activity,poor emulsification and wettability,and ALE had a strong corrosion inhibition performance for carbon steel.