Investigation of the CO2 adsorption performance of ionic liquid polymer
Guo Chenchen
Abstract：To improve the CO2 adsorptive capacities ot ionic liquid,the quaternary ammonium salt ionic liquid polymers were synthesized by free radical polymerization.Additionally,the porous ionic liquid polymers were achieved by two-staged seeded swelling polymerzation.The characteristics of the polymers were tested by SEM and DSC-TG.Adsorption isotherms of CO2 on the polymers,which were synthesized by four different kinds of swelling agents,were investigated.The main findings are summarized as follows:the porous ionic liquid polymers have highly developed micro pore structure,and the pore widths have continuous distribution in the range of 0.4 ～ 0.8 nm.The pore widths mainly distribute in the range of 0.5 ～ 0.6 nm,which is up to 38％.The swelling agents had effect on pore size distribution and the cumulative pore volume,which is attributed to the difference of the solubility between the swelling agents and polymers.The pore size distribution of polymers is more uniform when using the mixed swelling agents.The cumulative pore volume decreases obviously when using the cyclic ethane swelling agents.The CO2 adsorptive capacity is mainly affected by the cumulative pore volume.The polymers with equivalent cumulative pore volume have the similar CO2 adsorptive capacity,which is about 1.1％ at 273 K and 0.101 MPa.
Keywords：ionic liquidspolymerspore size distributionswelling agentsCO2 adsorption
Publication Date：2017-01-01