摘要
以N,N-二甲基脂肪胺和1,4-二溴丁烷为原料,合成了一系列具有不同疏水链的不对称Gemini表面活性剂C12H25(CH3)2N+(CH2)4N+(CH3)2CmH2m+1(C12-4-Cm,m=12,14,16,18),并通过1H NMR(核磁共振氢谱)、MS(质谱)和元素分析等方法鉴定其结构.采用表面张力法测定15℃时,m=14,16,18的临界胶束浓度ccmc值依次为7.56×10-7,9.72×10-7,1.23×10-6mol/L;对应的表面张力cγmc分别为28.46,30.08,28.71 mN.m-1.
A series of dissymmetric Gemini surfaetants with the structure of （C12H25（CH3）2N^＋ （CH2）4 N^＋ （CH3）2CmH2m＋1）, denoted as C12-4-Cm（m is 14,16,18）, have been synthesized with N,N dimethylal kylamine and 1,4-dibromobutane as the initial reagents. The structures were identified by 1^HNMR, MS and element analysis, and their surficial properties were investigated by equilibrium surface tension. All these products exhibit low critical micelle coneentration（ccmc ） and great efficiency in lowering the surface tension. Whilem is 14,16,18, their ccmc values are 7.56×10^-7,9.72×10^-7,1.23×10^- 6mol/L, and the y values are 28.46,30.08,28.71 mN·m^-1 , respectively.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2006年第2期163-166,共4页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(40472079)
湖北省自然科学基金资助项目(2000J023)
