一种新型含十六烷基Gemini表面活性剂的合成及性质研究

Study on Synthesis and Properties of a New Gemini Surfactant with Cetyl

以N,N-二甲基乙醇胺(DMAE)、己二酸二甲酯(DMH)和1-溴代十六烷为原料,合成了一种新型含十六烷基Gemini阳离子表面活性剂,总收率67.52%(以己二酸二甲酯计)。产物经1H-NMR、IR和元素分析确定了结构,其熔点为178～180℃,并对表面活性剂的性能进行了讨论。电导法测定产物的CMC(临界胶束浓度)为8.45×10-5mol/L,其乳化力较十二烷基硫酸钠(SDS)强,发泡性和稳泡性不及十二烷基硫酸钠(SDS)。

A cationic Gemini surfactant with cetyl was synthesized using DMAE, DMH and cetyl bromide. The total yield was 67.52% based on DMH. The structure of the product was characterized by 1H-NMR,IR and elemental analyzer and its melting point is 178-180℃. The interfacial properties of the surfactant has been discussed. The C MC was 845×10^-5mol/L with conductivity method. The emulsifying ability is excellent to SDS and the foam ability and foam stabilizer are not good as SDS.