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Enhanced CO2/N2 separation performance by using dopamine/polyethyleneimine-grafted TiO2 nanoparticles filled PEBA mixed-matrix membranes.
- Source :
-
Separation & Purification Technology . May2019, Vol. 214, p78-86. 9p. - Publication Year :
- 2019
-
Abstract
- Highlights • TiO 2 filled PEBA mixed-matrix membranes were fabricated. • TiO 2 fillers were grafted with dopamine and polyethyleneimine. • Enhanced CO 2 /N 2 separation were achieved by incorporating these TiO 2 fillers. Abstract Mixed matrix membranes (MMMs) were fabricated by incorporating synthesized titanium dioxide (TiO 2) nanoparticles into polyether block amide (PEBA) matrix to fabricate TiO 2 /PBEA MMMs for CO 2 /N 2 separation. The mesoporous channels of TiO 2 increased the density of active sites with high accessibility and also facilitate the diffusion of CO 2 in the gas separation process. Furthermore, amine groups are grafted onto the TiO 2 fillers via one step reaction with dopamine (DA) and polyethyleneimine (PEI). The modified TiO 2 fillers with abundant amine groups are conductive to transfer CO 2 owing to the reversible reaction occurred between CO 2 and amine groups. The effects of TiO 2 loading, DA/PEI modification on the morphology and CO 2 /N 2 separation performance of the resulting TiO 2 /PBEA MMMs were systematically studied. The results showed that the MMMs filled with 3 wt% DA-PEI-TiO 2 synthesized with DA/PEI mass ratio of 1/1 and PEI molecular weight of 1800 exhibited optimal separation performance with CO 2 permeability of 67 Barrer and CO 2 /N 2 selectivity of 101, surpassing the 2008 Robeson upper-bound. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13835866
- Volume :
- 214
- Database :
- Academic Search Index
- Journal :
- Separation & Purification Technology
- Publication Type :
- Academic Journal
- Accession number :
- 134957253
- Full Text :
- https://doi.org/10.1016/j.seppur.2018.02.020