Enhanced permeation performance of polyether-polyamide block copolymer membranes through incorporating ZIF-8 nanocrystals

Longwei Xu; Long Xiang; Chongqing Wang; Jian Yu; Lixiong Zhang; Yichang Pan

doi:10.1016/j.cjche.2016.11.007

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Enhanced permeation performance of polyether-polyamide block copolymer membranes through incorporating ZIF-8 nanocrystals

Separation Science and Engineering | Updated：2026-01-06

- Enhanced permeation performance of polyether-polyamide block copolymer membranes through incorporating ZIF-8 nanocrystals
- Chinese Journal of Chemical Engineering Vol. 25, Issue 7, Pages: 882-891(2017)
- Affiliations：
  
  State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University,Nanjing,China,210009
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.11.007
  CLC：
- Published：2017
- Accepted：
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Longwei Xu, Long Xiang, Chongqing Wang, Jian Yu, Lixiong Zhang, Yichang Pan. Enhanced permeation performance of polyether-polyamide block copolymer membranes through incorporating ZIF-8 nanocrystals[J]. , 2017, 25(7): 882-891.
DOI：

Longwei Xu, Long Xiang, Chongqing Wang, Jian Yu, Lixiong Zhang, Yichang Pan. Enhanced permeation performance of polyether-polyamide block copolymer membranes through incorporating ZIF-8 nanocrystals[J]. , 2017, 25(7): 882-891. DOI： 10.1016/j.cjche.2016.11.007.

摘要

Abstract

Membrane-based CO

separation is a promising alternative in terms of energy and environmental issues to other conventional techniques. Polyether-polyamide block copolymer (Pebax) membranes are promising for CO

separation because of their excellent selectivity

but limited by their moderate gas permeability. In this study

fresh-prepared zeolitic imidazolate framework-8 (ZIF-8) nanocrystals were integrated into the Pebax

1657 matrices to form mixed matrix membranes. The resulting membrane exhibits significantly improved CO

permeability (as high as 300% increase)

without the sacrifice of the selectivity

to the pristine polymer membrane. Several physical characterization techniques were employed to confirm the good interfacial interaction between ZIF-8 fillers and Pebax matrices. The effect of added ZIF-8 fillers on the transport mechanism through MMMs is also explored. Mixed-gas permeation for both CO

and CO

/CH

was also evaluated. The separation performance for CO

/CH

mixtures on the ZIF-8/Pebax MMMs is very close to the Roberson upper bound

and thus

is technologically attractive for purification of natural gas.

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