Four gemini cationic surfactants were synthesized by N alkylation reaction of N,N dimethyl dodecyl amine with 1,2 ethanediol dichloracetate, 1,3 propanediol dichloracetate, 1,4 butanediol dichloracetate and 1,6 hexane...Four gemini cationic surfactants were synthesized by N alkylation reaction of N,N dimethyl dodecyl amine with 1,2 ethanediol dichloracetate, 1,3 propanediol dichloracetate, 1,4 butanediol dichloracetate and 1,6 hexanediol dichloracetate, respectively. The molecular structures of the surfactants were characterized by IR and 1H NMR spectra. The cmc values of gemini cationic surfactants SAA1, SAA2, SAA3, SAA4 were 0 91, 0 34, 0 35 and 0 78 mmol/L, respectively, much lower than that of the corresponding conventional single tailed surfactant [C 12 H 25 N(CH 3) 2CH 2 COOC 2H 5] +Cl -, whose cmc is 8 9 mmol/L. Their foaming capacity was 162, 171, 160, 168 mm, respectively , higher than 157 mm for [C 12 H 25 N(CH 3) 2CH 2COOC 2H 5] +Cl -.展开更多
以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSG...以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSGS).用红外光谱(IR)对QSGS和EPEPS的结构进行了表征,并对QSGS的临界胶束浓度(cmc)、表面张力、发泡力、耐酸碱盐稳定性和在硬水中的稳定性等进行了测定.结果表明:QSGS水溶液的cmc为1.6 g/L,cmc处表面张力(γcmc)为25.5 m N/m.质量分数为0.5%的QSGS水溶液发泡力为1.63,5 min稳泡性为0.158,在硬水中的稳定性为5级.QSGS溶液具有很好的耐酸、耐碱、耐盐等化学稳定性.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 wi...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Four gemini cationic surfactants were synthesized by N alkylation reaction of N,N dimethyl dodecyl amine with 1,2 ethanediol dichloracetate, 1,3 propanediol dichloracetate, 1,4 butanediol dichloracetate and 1,6 hexanediol dichloracetate, respectively. The molecular structures of the surfactants were characterized by IR and 1H NMR spectra. The cmc values of gemini cationic surfactants SAA1, SAA2, SAA3, SAA4 were 0 91, 0 34, 0 35 and 0 78 mmol/L, respectively, much lower than that of the corresponding conventional single tailed surfactant [C 12 H 25 N(CH 3) 2CH 2 COOC 2H 5] +Cl -, whose cmc is 8 9 mmol/L. Their foaming capacity was 162, 171, 160, 168 mm, respectively , higher than 157 mm for [C 12 H 25 N(CH 3) 2CH 2COOC 2H 5] +Cl -.
文摘以α,ω-含氢硅油(α,ω-PHMS)和烯丙基环氧基聚醚(APEE)为原料,无水乙醇为溶剂,在铂催化下,通过硅氢加成合成环氧基聚醚聚硅氧烷(EPEPS),再与N,N-二甲基十二烷基叔胺(DMA12)进行开环反应,制得一种新型季铵盐型有机硅双子表面活性剂(QSGS).用红外光谱(IR)对QSGS和EPEPS的结构进行了表征,并对QSGS的临界胶束浓度(cmc)、表面张力、发泡力、耐酸碱盐稳定性和在硬水中的稳定性等进行了测定.结果表明:QSGS水溶液的cmc为1.6 g/L,cmc处表面张力(γcmc)为25.5 m N/m.质量分数为0.5%的QSGS水溶液发泡力为1.63,5 min稳泡性为0.158,在硬水中的稳定性为5级.QSGS溶液具有很好的耐酸、耐碱、耐盐等化学稳定性.
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.
