Journal of Surfactants and Detergents p. 533 - 539 (2012)
Update date:2022-07-29
Topics:
Qiao, Weihong
Zheng, Zhibo
Shi, Qingzhao
Switchable surfactants are environment-friendly compounds, which can be separated from the system or lose surface activity after completing their function during one stage of a process. In order to study switchable properties of a kind of CO2 switchable surfactant with an imidazoline group, four 2-alkyl-1-hydroxyethylimidazolines were synthesized by condensation of N-(2-hydroxyethyl)ethanediamine with dodecanoic, tetradecanoic, hexadecanoic, and octadecanoic acids. Then, the series of long-chain alkyl imidazoline compounds were reacted with dry ice to produce imidazolinium bicarbonates cationic surfactants. The critical micelle concentration (CMC) and surface tension at CMC (γcmc) measured by the Wilhelmy plate technique show that these surfactants have excellent surface activity. The changes of conductivity before and after bubbling CO2 show the conversion between imidazolines and imidazolinium bicarbonates cationic surfactants. Conductivity cycles indicated that these surfactants could be switched by CO2 reversibly and repeating this three times. However, their switchable function on the emulsification-demulsification of water-alkane was dissatisfactory due to the emulsibility of amide which was hydrolyzed from 2-alkyl-1-hydroxyethylimidazoline. Therefore, the application of these switchable surfactants needed to be studied further.
View MoreZhejiang Genebest Pharmaceutical Co.,Ltd.
Contact:0086-571-63532866
Address:No.1 Jinboshi Rd Lishan Town Fuyang City Zhejiang Province China
Luzhou North Chemical Co., Ltd.
Contact:+86-830-2796784;+86-830-2796776
Address:Gaoba, Longmatan District, Luzhou, Sichuan Province
HaiNan Periwinkle Pharmaceutical Co.,Ltd.
website:http://www.cchpharm.com/en/index.html
Contact:020-82208978
Address:Gongye road,Wuzhishan city,HaiNan province
Taixing Joxin Bio-tec Co.,Ltd.
website:http://www.joxbio.com
Contact:86-523-87558858 87612088
Address:No.88, chengdong industrial park
Shanghai Demand Chemical Co., ltd,China
Contact:86-021-55237578/55239122
Address:Room 3H, No.578, Yingkou Road, Yangpu District, Shanghai, China
Doi:10.1002/asia.201200234
(2012)Doi:10.1063/1.440707
(1980)Doi:10.3390/molecules25204858
(2020)Doi:10.1002/jhet.859
(2012)Doi:10.1134/S1070363212080257
()Doi:10.1002/ejic.201200378
(2012)