Volume 139, Issue 41 e52994
RESEARCH ARTICLE

Synthesis of new copolyimides containing pyridine and morpholine groups for gas separation through molecular design and simulation

Jing Ni

Jing Ni

College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China

Contribution: Data curation (lead), Software (lead), Validation (lead), Writing - original draft (lead)

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Hongchao Niu

Hongchao Niu

College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China

Contribution: Formal analysis (supporting), Validation (supporting)

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Shiqing Lai

Shiqing Lai

Contribution: Conceptualization (supporting), Supervision (supporting)

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Chanjuan Liu

Corresponding Author

Chanjuan Liu

College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China

Correspondence

Xiaohua Huang and Chanjuan Liu, College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, No. 12, Jiangan Road, Guilin City 541004, Guangxi Province, China.

Email: [email protected] and [email protected]

Lichun Wang, School of Textile and Clothing, Nantong University, Nantong 226019, China.

Email: [email protected]

Contribution: Funding acquisition (supporting), ​Investigation (supporting), Supervision (equal), Validation (supporting), Writing - original draft (supporting)

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Li Zhou

Li Zhou

College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China

Contribution: Writing - original draft (supporting)

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Lichun Wang

Corresponding Author

Lichun Wang

School of Textile and Clothing, Nantong University, Nantong, China

Correspondence

Xiaohua Huang and Chanjuan Liu, College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, No. 12, Jiangan Road, Guilin City 541004, Guangxi Province, China.

Email: [email protected] and [email protected]

Lichun Wang, School of Textile and Clothing, Nantong University, Nantong 226019, China.

Email: [email protected]

Contribution: Validation (supporting), Writing - original draft (supporting)

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Xiaohua Huang

Corresponding Author

Xiaohua Huang

College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin, China

Correspondence

Xiaohua Huang and Chanjuan Liu, College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, No. 12, Jiangan Road, Guilin City 541004, Guangxi Province, China.

Email: [email protected] and [email protected]

Lichun Wang, School of Textile and Clothing, Nantong University, Nantong 226019, China.

Email: [email protected]

Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (lead), Funding acquisition (lead), Project administration (lead), Resources (lead), Software (supporting), Supervision (lead), Validation (equal), Writing - original draft (lead)

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First published: 18 August 2022

Funding information: National Natural Science Foundation of China, Grant/Award Numbers: 51963007, 52003064; Natural Science Foundation of Guangxi Province, Grant/Award Numbers: 2020GXNSFAA159006, 2021GXNSFAA075016, 2020GXNSFAA159009; Project of the Department of Science and Technology of Guilin, Grant/Award Number: 2020010906

Abstract

Through one-step copolymerization of 4-(4-[1-morpholinyl]phenyl)-2,6-bis(4-aminophenyl)pyridine (MPAP), 9,9-bis(4-aminophenyl)fluorene (BAFL), and (4,4′-hexafluoroisopropylidene)diphthalic anhydride (6FDA), a series of polyimides containing morpholine group, pyridine ring, fluorene “cardo” pendant and hexafluoroisopropyl group are obtained. The synthesized polyimides have good thermal stability, high transparency, outstanding hydrophobicity and excellent solubility in not only high-boiling solvents but also low boiling-point solvents. Furthermore, polyimide films have large molecular chain spacing, which is consistent with the free volume calculated by molecular simulation. Consequently, polyimide membranes display better gas permeability values of CO2 (up to 24.47 Barrer) and He (up to 45.04 Barrer), and good ideal gas selectivity values of CO2/N2 (up to 15.33 Barrer) and He/N2 (up to 23.89 Barrer), which also shows potential application of polyimide matrix materials in gas separation.

DATA AVAILABILITY STATEMENT

The authors confirm that the data supporting the findings of this study are available within the article and its supplementary materials.

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