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Probe Into the Influence of Crosslinking on CO2 Permeation of Membranes.

Abstract：

:Crosslinking is an effective way to fabricate high-selective CO2 separation 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 CO2 selectivities was systematically investigated, which revealed that CO2 selectivities increased obviously with the enhancement of chalcone fractions within a certain limit. Further, the CO2 selectivities 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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Li J,Chen Z,Umar A,Liu Y,Shang Y,Zhang X,Wang Y

doi

10.1038/srep40082

subject

Has Abstract

pub_date

2017-01-04 00:00:00

pages

40082

issn

2045-2322

pii

srep40082

journal_volume

7

pub_type

杂志文章

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