知识与财富的链接
以丙酮为溶剂,二(二甲基胺基乙基)邻苯二甲酸酯分别与氯乙酸正十二醇酯、氯乙酸正十四醇酯及氯乙酸正十六醇酯回流反应36 h,得到3种含长链脂肪醇酯基季铵盐双子表面活性剂C12、C14、C16,收率80%.采用两相滴定法测定了其纯度,采用电导法测定了其CMC值分别是2.6×10-4、3.6×10-5,8.02×10-6.在无水乙酸钠与对甲基氯苄反应中,研究了C16的催化性能.当其浓度为0.004 394 mol.L-1,该反应活化能(Ea)相对于不加催化剂降低了18.59 kJ.mol-1,具有良好的催化性能.
Three Gemini surfactants(C12,C14,C16) with ester based long-chain fatty alcohol were prepared by reacting bis((dimethylamino) methyl) phthalate with dodecyl 2-chloroacetate,tetradecyl 2-chloroacetate and hexadecyl 2-chloroacetate respectively with 80% yield in acetone for refluxing 36 h.The purity was measured by two-phase chemical titration analysis,and the critical micelle concentration(CMC) values were 2.6×10-4,3.6×10-5,8.02×10-6 by measuring the electrical conductivity.The phase transfer catalysis property of(C16) was studied by reaction of 4-methyl benzyl chloride with sodium acetate.It was founded that C16 had good catalysis property when reaction activation energy(Ea) was 18.59 kJ·mol-1 lower than the blank at Cb=0.004 394 mol·L-1.