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作 者:蒋福宾[1] 曾华辉[1] 杨正业[1] 黄丽亚[1] 李俊杰[1] 宋宝玲[1]
机构地区:[1]广西大学化学化工学院
出 处:《精细化工》2007年第11期1074-1079,共6页Fine Chemicals
基 金:广西壮族自治区自然科学基金(0575002;0640008)~~
摘 要:以脱氢枞胺(DA)为原料,经中间体N,N-二甲基脱氢枞胺(DMDA),在乙腈溶液中,DMDA分别与1,3-二溴丙烷(摩尔比2.4∶1)和对溴二亚甲苯(摩尔比2.2∶1)加热回流48h,得到二(N-脱氢枞基-N,N-二甲基)-N,N′-(1,3-亚丙基)溴化二铵(DDMPDAB)和二(N-脱氢枞基-N,N-二甲基)-N,N′-对二亚甲苯基溴化二铵(DDMXDAB)两种双子表面活性剂。用元素分析,FTIR,1HNMR和13CNMR对二者进行了结构表征,测定其表面性能如下:DDMPDAB的阳离子表面活性物的质量分数为94.2%,临界胶束浓度为2.1×10-5mol/L,乳化力为22min,泡沫力为149mm,泡沫稳定性为53mm,Krafft为42℃,HLB为10.24;DDMXDAB的阳离子表面活性物的质量分数为90.8%,临界胶束浓度为8.0×10-5mol/L,乳化力为26.5min,泡沫力为160mm,泡沫稳定性为91mm,Krafft为43℃,HLB为10.88。二者与N-脱氢枞基-N,N,N-三甲基硫酸甲酯铵(DTMAS)、N-脱氢枞基-N,N-二甲基-N-苄基氯化铵(DDMBAC)和十六烷基三甲基溴化铵(CTAB)的表面性能进行了对比,结果表明:作者合成的两种表面活性剂具有更优良的表面活性。将产品和十二烷基硫酸钠(K12)分别配成质量分数为0.3%的水溶液,等体积混合后均不产生沉淀,说明产品与阴离子表面活性剂有很好的相容性。Two types of germini cationic surfactants, N, N-dimethyl-N-dehydroabietyl-N, N'-( 1, 3- propylene) diammonium dibromide (DDMPDAB) and N, N-dimethyl-N-dehydroabietyl-N, N'-(pxylene) diammonium dibromide (DDMXDAB) ,were synthesized in acetonitrile solvent by refluxing the intermediate N,N-dimethyldehydroabietylamine (DMDA) for 48 h with 1,3-dibronlpropane or p-xylene dibromide in mole ratio 2.4:1 or 2.2:1 respectively. DMDA was prepared with dehydroabietylamine, formic acid and formaldehyde. Structures of the products were characterized by elementary analysis, FTIR, ^1HNMR and ^13CNMR. For DDMPDAB, w [ CSA( cationic surface active substarlce)] = 94. 2%, CMC = 2. 1 × 10^-5 mol/L, EA (emulfying ability) = 22 min, FA (foaming ability) = 149 mm, FS ( foaming stability) = 53 mm, KP ( Krafft point) = 42 ℃, and HLB = 10.24 ;for DDMXDAB, w (CSA) =90.8% ,CMC =8.0 × 10^-5 mol/l,,EA =26.5 min,FA = 160 mm,FS =91 mm,KP =43 ℃ and HLB = 10.88. These results show that they possess trimethyl-N-dehyroabietylammonium dehydroabietylammonium chloride ( better surface activity as compared with N, N, N- sulfate (DTMAS), N, N-dimethyl-N-benzyl-N- and CTAB. No precipitation occurs when 0. 3% aqueous solutions of these products are mixed with 0.3% aqueous solution of anionic surfactant K12, thus they can be used together with anionic surfactants.
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