以α,ω-二溴代烷、丁基咪唑和三丁基膦为原料经过二步反应合成了3种Bola型非对称阳离子表面活性剂。中间体1-（12-溴十二烷基）-3-丁基咪唑溴盐的较佳合成工艺条件为：n（丁基咪唑）∶n（1,12-二溴十二烷）∶n（四丁基碘化铵）=1∶1.5...以α,ω-二溴代烷、丁基咪唑和三丁基膦为原料经过二步反应合成了3种Bola型非对称阳离子表面活性剂。中间体1-（12-溴十二烷基）-3-丁基咪唑溴盐的较佳合成工艺条件为：n（丁基咪唑）∶n（1,12-二溴十二烷）∶n（四丁基碘化铵）=1∶1.5∶0.005,异丙醇作溶剂,反应温度65℃,反应时间6 h;Bola型表面活性剂的合成工艺条件为：n（1-（12-溴十二烷基）-3-丁基咪唑溴盐）∶n（三丁基膦）=1.05∶1,微波辅助反应,反应温度80℃,反应时间12 h。所合成的Bola型表面活性剂表现出了优良的表面活性,30℃时cmc在5.7×10^-3～8.7×10^-2mol·L^-1之间、γcmc在30～36 m N·m^-1之间;随着碳链长度的增长,其cmc,γ_cmc及分子最小横截面积（A_min）逐渐减小,饱和吸附量（Γ_max）和吸附效率（pc_20）逐渐增大。展开更多
The color reaction of 1(2,6dichloro4nitrophenyl)3(4nitrophenyl)Triazene(DCNPNPT)with cethyltrimethylammonium bromide(CTMAB) and cetylpyridinium bromide(CPB)were studied.In NaOH medium,DCNPNPT reacts with quartenary am...The color reaction of 1(2,6dichloro4nitrophenyl)3(4nitrophenyl)Triazene(DCNPNPT)with cethyltrimethylammonium bromide(CTMAB) and cetylpyridinium bromide(CPB)were studied.In NaOH medium,DCNPNPT reacts with quartenary ammonium cationic surfactant(CTMAB,CPB)to form a purplered complex with the molar ratio of 1∶3.The molar absorptivities of CTMAB and CPB are 393×104L·mol1·cm1 and 416×104L·mol1·cm1 by using dualwavelength spectrophotometry.Beers law is obeyed in the range of 0～328×105mol·L1 for CTMAB,0～316×105 mol·L1 for CPB.The critical micella concentration of CTMAB and CPB in the color system was determined.The method was applied to the direct determination of cationic surfactant in water with satisfactory results.展开更多
文摘以α,ω-二溴代烷、丁基咪唑和三丁基膦为原料经过二步反应合成了3种Bola型非对称阳离子表面活性剂。中间体1-（12-溴十二烷基）-3-丁基咪唑溴盐的较佳合成工艺条件为：n（丁基咪唑）∶n（1,12-二溴十二烷）∶n（四丁基碘化铵）=1∶1.5∶0.005,异丙醇作溶剂,反应温度65℃,反应时间6 h;Bola型表面活性剂的合成工艺条件为：n（1-（12-溴十二烷基）-3-丁基咪唑溴盐）∶n（三丁基膦）=1.05∶1,微波辅助反应,反应温度80℃,反应时间12 h。所合成的Bola型表面活性剂表现出了优良的表面活性,30℃时cmc在5.7×10^-3～8.7×10^-2mol·L^-1之间、γcmc在30～36 m N·m^-1之间;随着碳链长度的增长,其cmc,γ_cmc及分子最小横截面积（A_min）逐渐减小,饱和吸附量（Γ_max）和吸附效率（pc_20）逐渐增大。
文摘The color reaction of 1(2,6dichloro4nitrophenyl)3(4nitrophenyl)Triazene(DCNPNPT)with cethyltrimethylammonium bromide(CTMAB) and cetylpyridinium bromide(CPB)were studied.In NaOH medium,DCNPNPT reacts with quartenary ammonium cationic surfactant(CTMAB,CPB)to form a purplered complex with the molar ratio of 1∶3.The molar absorptivities of CTMAB and CPB are 393×104L·mol1·cm1 and 416×104L·mol1·cm1 by using dualwavelength spectrophotometry.Beers law is obeyed in the range of 0～328×105mol·L1 for CTMAB,0～316×105 mol·L1 for CPB.The critical micella concentration of CTMAB and CPB in the color system was determined.The method was applied to the direct determination of cationic surfactant in water with satisfactory results.
