title: Probe Into the Influence of Crosslinking on CO2Permeation of Membranes.
abstract: Crosslinking is an effective way to fabricate high-selective CO2separation membranes because of its unique crosslinking framework. Thus, it is essentially significant to study the influence of crosslinking degree on the permeation selectivities of CO2. Herein, we report a successful and facile synthesis of a series of polyethylene oxide (PEO)-based diblock copolymers (BCP) incorporated with an unique UV-crosslinkable chalcone unit using Reversible Addition-Fragmentation Chain Transfer Polymerization (RAFT) process. The membranes of as-prepared BCPs show superior carbon dioxide (CO2) separation properties as compared to nitrogen (N2) after UV-crosslinking. Importantly, the influence of different proportions of crosslinked chalcone on CO2selectivities was systematically investigated, which revealed that CO2selectivities increased obviously with the enhancement of chalcone fractions within a certain limit. Further, the CO2selectivities of block copolymer with the best block proportion was studied by varying the crosslinking time which confirmed that the high crosslinking degree exhibited a better CO2/N2(αCO2/N2) selectivities. A possible mechanism model revealing that the crosslinking degree played a key role in the gas separation process was also proposed.
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, PR China.
authors.forename: Jinghui
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, PR China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Kingdom of Saudi Arabia.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Umar
authors.affiliation: Beijing Key Laboratory of Radiation Advanced Materials, Beijing Research Center for Radiation Application, Beijing 100015, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Shang
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, PR China.
authors.forename: Xiaokai
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, PR China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Wang