论文部分内容阅读
通过三步反应合成出一系列不同碳原子数连接基阴离子双子表面活性剂(N,N′-双十二烷基-双羧丙酰基-烷撑二胺(2C12H25CnAm,n=2,3,4)。三种表面活性剂都具有低临界胶束浓度,且都能高效地降低表面张力。通过pC20,CMC/C20,pC30,CMC/C30参数分析了它们的吸附和胶束化行为。表面活性剂CMC值随连接基长度的增加先减小再增大,在n=3时达到最小2.17×10-5 mol/L;界面张力值随着连接基长度的增加而减小,最小可达到1.87mN/m。
A series of anionic anionic gemini surfactants (N, N’-didodecyl-bocarboxypropionyl-alkylene diamine (2C12H25CnAm, n = 2, 3, ) .The three surfactants all have low critical micelle concentration, and can effectively reduce the surface tension.The adsorption and micellar behaviors of pC20, CMC / C20, pC30, CMC / C30 were analyzed by their surface activity The CMC value decreases first and then increases with the increase of linker length, reaching the minimum of 2.17 × 10-5 mol / L at n = 3. The interfacial tension value decreases with the increase of linker length, and the minimum can reach 1.87 mN / m.