【作者】 许虎君； 吕春绪； 陆明； 叶志文；

【Author】 XU Hu-jun,LV Chun-xu,LU Ming,YE Zhi-wenSchool of Chemical and Material Engineering,Southern Yangtze University,Wuxi 214036,China School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

【机构】 江南大学化学与材料工程学院； 南京理工大学化工学院；

【摘要】 合成了一系列酯基Gemini型季铵盐表面活性剂:烷基-α,ω-双(二甲基酰氧乙基溴化铵),标记为II-m-n(m=12,14;n=3,4,6);采用红外光谱和核磁共振进行结构表征。测定了相关的性能,结果表明,酯基Gemini型季铵盐表面活性剂具有很强的胶束生成能力,其临界胶束浓度(cmc)为2.63×10(?)-4.17×10-4 mol·L-1(m=12)及2.88×10-5-4.46×10-5 mol·L-1(m=14),分别比相应的单季铵盐表面活性剂的临界胶束浓度低两个数量级;其泡沫稳定性、乳化性能和杀菌性明显优于相应的单季铵盐表面活性剂。更多还原

【Abstract】 The preparation and properties of esterquat Gemini surfactants,[H2m-1Cm-1,COOCH2CH2-(CH3)2N+ (CH2)n+N(CH3)2CH2CH2OOCCm-1H2m-1]2Br(symbolized Ⅱ-m-n,m=10,12,14,18 ;n=3,4,6) ,were investigated.The chemical structure of the products were detected by IR and H-NMR.The results show that these surfactants have powerfully formation capability of micellization.the critical micelle concentration (cmc) of these surfactants is 2.63 10-4- 4.17 10-4 mol·L-1(m=12) and 2.88×10-5- 4.46×10-5 mol·L-1(m=14).The foaming,emulsification and bactericidal activities are better than conventional cationic surfactants.更多还原