Author:
SHU 舒 Ruchen 茹晨,XU 许 Hui 卉,PEI 裴 Chenxiao 晨霄,WANG 王 Nan 楠,LIU 刘 Xingang 新刚,HOU 侯 Jianyuan 剑源,YUAN 袁 Yuan 圆,ZHANG 张 Renxi 仁熙
Abstract
Abstract
The ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate treated with radiofrequency plasma is proposed for functionalization and immobilization on polyethersulfone supports to form supported ionic liquid membranes for CO2 separation. The effects of treatment time and transmembrane pressure difference on CO2 permeance were evaluated. The best gas permeation performance was obtained with a treatment time of 10 min and the transmembrane pressure difference was 0.25 MPa. Characterization of the materials by Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy and nuclear magnetic resonance spectroscopy demonstrates that the IL is grafted with carboxyl groups and deprotonated through plasma treatment. A preliminary mechanism for the plasma treatment and facilitated transport of CO2 has been proposed on this basis.
Funder
the National Key R&D Program of China ‘intergovernmental international scientific and technological innovation cooperation’