Remarkably Improved Gas Separation Performance of Polyimides by Forming “Bent and Battered” Main Chain Using Paracyclophane as Building Block

Lu-Jun Huang; Ya-Tao Weng; Aqib Raiz; Zhi-Jie Mao; Xiao-Hua Ma

doi:10.1007/s10118-023-3012-5

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Remarkably Improved Gas Separation Performance of Polyimides by Forming “Bent and Battered” Main Chain Using Paracyclophane as Building Block

RESEARCH ARTICLE | Updated：2023-09-21

- Remarkably Improved Gas Separation Performance of Polyimides by Forming “Bent and Battered” Main Chain Using Paracyclophane as Building Block
- Chinese Journal of Polymer Science Vol. 41, Issue 10, Pages: 1617-1628(2023)
- Affiliations：
  
  a.State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China
  b.School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China
  c.Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, China
- Author bio：
  
  mzjnju@jxstnu.edu.cn (Z.J.M.)
  xhuama@tiangong.edu.cn (X.H.M.)
- Funds：
- DOI：10.1007/s10118-023-3012-5
  CLC：
- Received：19 April 2023，
  
  Revised：2023-5-27，
  
  Accepted：28 May 2023，
  
  Online First：05 July 2023，
  
  Published：01 October 2023
- Accepted：
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Huang, L. J.; Weng, Y. T.; Raiz, A.; Mao, Z. J.; Ma, X. H. Remarkably improved gas separation performance of polyimides by forming “bent and battered” main chain using paracyclophane as building block. Chinese J. Polym. Sci. 2023, 41, 1617–1628

Lu-Jun Huang, Ya-Tao Weng, Aqib Raiz, et al. Remarkably Improved Gas Separation Performance of Polyimides by Forming “Bent and Battered” Main Chain Using Paracyclophane as Building Block[J]. Chinese Journal of Polymer Science, 2023, 41(10): 1617-1628.
Huang, L. J.; Weng, Y. T.; Raiz, A.; Mao, Z. J.; Ma, X. H. Remarkably improved gas separation performance of polyimides by forming “bent and battered” main chain using paracyclophane as building block. Chinese J. Polym. Sci. 2023, 41, 1617–1628 DOI： 10.1007/s10118-023-3012-5.

Lu-Jun Huang, Ya-Tao Weng, Aqib Raiz, et al. Remarkably Improved Gas Separation Performance of Polyimides by Forming “Bent and Battered” Main Chain Using Paracyclophane as Building Block[J]. Chinese Journal of Polymer Science, 2023, 41(10): 1617-1628. DOI： 10.1007/s10118-023-3012-5.

摘要

A huge improvement of microporosity

solubility and gas separation properties for two intrinsic microporous polyimides were reported by incorporating of the paracyclophane with topological ultra-micropore (3.09 Å) into the polyimide backbone. This strategy of using topological ultra-micropore subunit to construct polymers paves a new way to search for advanced membranes for gas separation applications.

Abstract

The design and development of highly permeable

selective and stable polymer membranes are great challenges in the gas separation industry. Herein

we constructed two intrinsic microporous polyimides (6FPCA and 6FMCA) derived from two isometric diamines (PCA and MCA)

which were synthesized by palladium catalyzed C―N coupling reaction. The PCA and MCA diamines contain a hollow beaded structure of 2

2’-paracyclophane as a building block with a specified window size of 3.09 Å. The chemical structures of monomers

polyimides were confirmed by NMR

FTIR

and elementary analysis. 6FPCA and 6FMCA exhibit good solubility

excellent thermal stability

and mechanical properties. 6FPCA exhibits much larger microporosity (434 versus 120 m

·g

−1

)

FFV (0.22 versus 0.15)

-spacing (6.9 versus 5.9 Å)

and over 10 times higher permeability with a very little decrease in selectivity than the corresponding polyimide (6FpA) with a plane structure

which remarkably increased their separation performance from far below the 2008 Robeson Upper bounds to reach these limitations for O

and CO

/CH

. Additionally

the 6FPCA also demonstrates good plasticization resistance

moderate aging properties

and high CO

/CH

mixed-gas separation performance. These results indicate that paracyclophane subunit can be successfully incorporated into polymers to enhance their ultra-microporosity and separation properties

which open a new avenue for developing high performance gas separation membranes with topological ultra-micropores.

关键词

Keywords

references

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