以异丙醇为溶剂,柠檬酸、十二烷基二甲基叔胺和环氧氯丙烷为原料合成了柠檬酸三酯三联季铵盐阳离子表面活性剂(CTTTA)。在反应温度85℃,反应时间12 h 条件下,产物的收率大于90%,纯度97.58%,Krafft 点<0℃。用表面张力法、稳态荧光探...以异丙醇为溶剂,柠檬酸、十二烷基二甲基叔胺和环氧氯丙烷为原料合成了柠檬酸三酯三联季铵盐阳离子表面活性剂(CTTTA)。在反应温度85℃,反应时间12 h 条件下,产物的收率大于90%,纯度97.58%,Krafft 点<0℃。用表面张力法、稳态荧光探针法和电导法在25℃测定的产物临界胶束浓度(cmc)值分别为3.3×10^(-4),3.4×10^(-4)和3.5×10^(-4)mol/L。CTTTA 与传统阳离子表面活性剂相比,有较高的表面活性。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
文摘以异丙醇为溶剂,柠檬酸、十二烷基二甲基叔胺和环氧氯丙烷为原料合成了柠檬酸三酯三联季铵盐阳离子表面活性剂(CTTTA)。在反应温度85℃,反应时间12 h 条件下,产物的收率大于90%,纯度97.58%,Krafft 点<0℃。用表面张力法、稳态荧光探针法和电导法在25℃测定的产物临界胶束浓度(cmc)值分别为3.3×10^(-4),3.4×10^(-4)和3.5×10^(-4)mol/L。CTTTA 与传统阳离子表面活性剂相比,有较高的表面活性。
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.
