Long-spacer-chain imidazolium functionalized poly(ether ether ketone) as hydroxide exchange membrane for fuel cell

Yan, Xiaoming; Gao, Li; Zheng, Wenji; Ruan, Xuehua; Zhang, Caimian; Wu, Xuemei; He, Gaohong

doi:10.1016/j.ijhydene.2016.06.030

Cited by 41 publications

(6 citation statements)

References 49 publications

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“…Cationic (ammonium) polyelectrolyte forms of PEEK containing some portion of aromatic methyl groups have been produced via benzylic bromination with N -bromosuccinimide and subsequent quaternization using imidazole or tertiary amines. − Thus, the literature does contain a handful of examples of modifying PEEK with imidazolium pendants; however, no work has been reported regarding the placement of imidazolium cations within the PEEK backbone. , …”

Section: Introductionmentioning

confidence: 99%

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

O’Harra

Kammakakam

Shinde

et al. 2022

ACS Appl. Polym. Mater.

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This work presents the first example of an imidazolium ionene containing aromatic ether-ketone-ether linkages inspired by poly(ether ether ketone) (PEEK), a well-known ultrahigh-performance (UHP) engineering polymer. The requisite starting materials for this “PEEK ionene” were efficiently synthesized in good yields and then polymerized through condensation (Menshutkin reaction), followed by anion metathesis to form the final polymer product, which had a number-average molecular weight (M n) of ∼90 kDa. The properties of the PEEK-ionene were thoroughly characterized, and its potential utility was demonstrated by analyzing this material as a gas separation membrane and 3D-printing this ionic UHP polymer. Thin films of this material and composites containing “free” ionic liquids (ILs) were also tested as membranes, to evaluate the gas/permeation behaviors. While the addition of [C4mim][Tf2N] IL to the PEEK-ionene enhanced membrane performance, the ether-functionalized [PEG1mim][Tf2N] IL exhibited notably different interactions with the PEEK-ionene, resulting in diminished selectivity and irregular ordering due to partial exfoliation and dissolution of the polymer. To better understand the range of processability and morphological effects with ILs, the PEEK-ionene was extruded into fibers and was 3D-printed through fused deposition modeling (FDM) techniques, to demonstrate how the PEEK-ionene is more readily processable than conventional PEEK. Compared to neutral PEEK, the PEEK-ionene with bistriflimide (Tf2N) counterions exhibited reduced glass-transition temperature (T g) and melting point (T m) and increased permeability to gases, as well as the ability to hold ILs within their structures. This approach to the design of ionenes and PEEK-containing materials can provide great opportunities to create tailored materials for a variety of applications.

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Section: Introductionmentioning

confidence: 99%

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

O’Harra

Kammakakam

Shinde

et al. 2022

ACS Appl. Polym. Mater.

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“…) of the flexibility of the side chain and thus can aggregate to form the interconnected ion conducting channels. The side-chain type AEMs generally exhibit hydroxide ion conductivity of 30-45 mS/cm and their nano-phase separated morphology could be clearly observed by atomic force microscopy (AFM), TEM or small angle X-ray scattering (SAXS) (Gao et al, 2016;Jannasch and Weiber, 2016;Qi et al, 2015;Yan et al, 2016;Yang et al, 2015;Zheng et al, 2017;Zuo et al, 2016). Although enhanced hydroxide ion conductivity was observed compared to the traditional main-chain type AEM, the performance of the side-chain type AEMS can hardly match that of Nafion ® (a commercial CEM with proton conductivity ~80 mS/cm).…”

Section: Side-chain Type Aemsmentioning

confidence: 99%

Advanced Materials for Polymeric Ultrafiltration Membranes Fabrication and Modification

Muhamad¹,

Nazri²,

Lau³

et al. 2018

Advanced Materials for Membrane Fabrication and Modification

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This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. The authors and publishers have attempted to trace the copyright holders of all material reproduced in this publication and apologize to copyright holders if permission to publish in this form has not been obtained. If any copyright material has not been acknowledged please write and let us know so we may rectify in any future reprint.Except as permitted under U.S. Copyright Law, no part of this book may be reprinted, reproduced, transmitted, or utilized in any form by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying, microfilming, and recording, or in any information storage or retrieval system, without written permission from the publishers.

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“…The ImPEEK/ImMIL-101(Cr) membrane exhibited higher performance in hydroxide conductivity than the majority of other polyaryletherketone based membranes as listed in Fig. 12 [40,42,48,[51][52][53][54][55][56]. However, IEC should not be excluded from the comparison in membrane performance considering the fact that membranes generally exhibited enhanced hydroxide con-ductivity but reduced dimensional stability with higher IEC values.…”

Section: Iec and Hydroxide Conductivitymentioning

confidence: 99%

Highly conductive and robust composite anion exchange membranes by incorporating quaternized MIL-101(Cr)

Gang

et al. 2017

Science Bulletin

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Long-spacer-chain imidazolium functionalized poly(ether ether ketone) as hydroxide exchange membrane for fuel cell

Cited by 41 publications

References 49 publications

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Advanced Materials for Polymeric Ultrafiltration Membranes Fabrication and Modification

Highly conductive and robust composite anion exchange membranes by incorporating quaternized MIL-101(Cr)

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