基于丙二酰胺结构不对称双子表面活性剂的合成及性能

在丙酮溶剂中，氯乙酸十六醇酯（I）与过量的二（3-二甲氨基丙基）丙二酰胺反应，用乙醚洗涤后，再与溴代十六烷季铵盐化，经丙酮-乙腈混合溶剂重结晶，得到了一种新型基于丙二酰胺结构的不对称Gemini表面活性剂（命名为16．18），收率为51．2％（以I计），纯度为99．6％。采用IR、1HNMR表征了结构，电导率法测定其CMC值为7．91×10^-5mol／L，滴体积法测定其YCMC为37．87mN／m，其Krafft点小于0℃，研究了其乳化、泡沫性能。

Synthesis and properties of a unsymmetrical Gemini surfactant based on the malonamide

Cetyl chloroacetate（ I ） reacted with excess bis [3-（dimethylamino） propyl] diethyl mal- onamide in acetone, washed with ether, and then quatemized with 1-bromohexadecane, the resulting qua- ternary salt with acetone-acetonitrile mixed solvent was recrystallized to obtain a novel of unsymmetrical Gemini surfactant based on the malonamide,named 16-18 ,with 51.2% yield （ based on I ）and 99.6% purity. The structure was confirmed by IRI1H NMR. The criticalmicelle concentration （CMC） was found to be 7.91×10-5 mol/L by measuring the electrical conductivity,and the surface tension TcMc was 37.87 rnN/m by a drop volume method,the Krafft point was below 0℃. Moreover,the forming property, emulsifying property were also studied.