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
以地沟油(主要成分为脂肪酸甘油三酯)为原料,经硫酸水解和环氧氯丙烷开环酯化反应制得脂肪酸氯代丙二醇酯(3);3与三乙胺经季铵化反应合成了一种新型的阳离子表面活性剂——氯化脂肪酸丙醇三乙基铵(4),其结构经1H NMR和IR表征。界面性能...以地沟油(主要成分为脂肪酸甘油三酯)为原料,经硫酸水解和环氧氯丙烷开环酯化反应制得脂肪酸氯代丙二醇酯(3);3与三乙胺经季铵化反应合成了一种新型的阳离子表面活性剂——氯化脂肪酸丙醇三乙基铵(4),其结构经1H NMR和IR表征。界面性能研究表明:4的cmc为4.16×10-3mol·L-1,γcmc为38.36 m N·m-1,其发泡力及稳泡性与十六烷基三甲基氯化铵接近。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 -.
文摘以地沟油(主要成分为脂肪酸甘油三酯)为原料,经硫酸水解和环氧氯丙烷开环酯化反应制得脂肪酸氯代丙二醇酯(3);3与三乙胺经季铵化反应合成了一种新型的阳离子表面活性剂——氯化脂肪酸丙醇三乙基铵(4),其结构经1H NMR和IR表征。界面性能研究表明:4的cmc为4.16×10-3mol·L-1,γcmc为38.36 m N·m-1,其发泡力及稳泡性与十六烷基三甲基氯化铵接近。
