一种新型腰果酚基阳离子表面活性剂的合成及表面活性

Synthesis and Surface Activity of A Novel Cashew Phenol-Based Cationic Surfactant

以腰果酚为原料分别与环氧氯丙烷、三甲胺进行反应,得到了一种新型腰果酚基阳离子表面活性剂。采用单因素实验得到优化反应条件为:n(腰果酚)∶n(环氧氯丙烷)∶n(三甲胺)=1∶1.6∶1.6、反应温度50℃、反应时间6h,在此条件下产率达到56%。通过红外光谱表征了产物的结构;利用四苯硼钠返滴定法测定了阳离子表面活性剂中季铵盐含量为80%;在(298.15±0.5)K下,采用滴体积法测定了阳离子表面活性剂的表面张力(γ)。结果表明,该阳离子表面活性剂的临界胶束浓度(CMC)为4.83mmol.L-1,γCMC为28.62mN.m-1,表现出良好的表面活性。

A novel cashew phenol-based cationic surfactant was synthesized using cashew phenol as raw ma- terial with the reaction of epichlorohydrin and trimethylamine, respectively. The single factor experiment was applied to optimizing the reaction conditions, the optimal conditions were as follows：n（cashew phenol） ： n（epi- chlorohydrin） ： n（trimethylamine） = 1 ： 1.6 ： 1.6,the reaction temperature was 50 ℃ ,the reaction time was 6 h,the yield was 56 % under above conditions. The structure of product was confirmed by infrared spectrosco- py. The content of quaternary ammonium salt was 80% measured by tetraphenyl boron sodium back titration method. The surface tension of cationic surfactant was determined by means of drop volume method under （298. 15±0.5） K. The results showed that the cationic surfactant exhibited good surface activity with the criti- cal micelle concentration（CMC） of 4.83 mmol ·L^-1 ,the γCMC Of 28. 62 mN ·m^-1.