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
以蛋氨酸和长链脂肪酸为原料,合成了4种不同碳链长度的含亚砜基蛋氨酸型表面活性剂（CnMSO）。通过FTIR、1HNMR和ESI-MS表征了产物的结构,并对该系列表面活性剂的表面张力、临界胶束浓度（CMC）、乳化性能、发泡性能、硬水稳定性和抑菌...以蛋氨酸和长链脂肪酸为原料,合成了4种不同碳链长度的含亚砜基蛋氨酸型表面活性剂（CnMSO）。通过FTIR、1HNMR和ESI-MS表征了产物的结构,并对该系列表面活性剂的表面张力、临界胶束浓度（CMC）、乳化性能、发泡性能、硬水稳定性和抑菌性能进行了测定。结果表明,该系列的表面活性剂的最低表面张力（γCMC）为21-24 m N/m,临界胶束浓度为0.15-1.5 mmol/L,在硬水中的平均稳定性均在3级以上,具有良好的泡沫性能和乳化性能。另外,产物对大肠杆菌、金黄色葡萄球菌和白色念珠菌的生长抑制作用明显,抑菌性优于N-月桂酰谷氨酸（C12G）。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 -.
文摘以蛋氨酸和长链脂肪酸为原料,合成了4种不同碳链长度的含亚砜基蛋氨酸型表面活性剂（CnMSO）。通过FTIR、1HNMR和ESI-MS表征了产物的结构,并对该系列表面活性剂的表面张力、临界胶束浓度（CMC）、乳化性能、发泡性能、硬水稳定性和抑菌性能进行了测定。结果表明,该系列的表面活性剂的最低表面张力（γCMC）为21-24 m N/m,临界胶束浓度为0.15-1.5 mmol/L,在硬水中的平均稳定性均在3级以上,具有良好的泡沫性能和乳化性能。另外,产物对大肠杆菌、金黄色葡萄球菌和白色念珠菌的生长抑制作用明显,抑菌性优于N-月桂酰谷氨酸（C12G）。
