Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes

Wiebke Germer, Janine Leppin, Carolina Nunes Kirchner, Hyeongrae Cho, Hyoung Juhn Kim, Dirk Henkensmeier, Kwan Young Lee, Mateusz Brela, Artur Michalak, Alexander Dyck

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Methylated polybenzimidazole (O-PBI) based anion exchange membranes with a degree of methylation of ca. 78% were prepared in the iodide, chloride, carbonate, bicarbonate, and hydroxide form. Swelling in water showed a high anisotropy for chloride and carbonate exchanged membranes and a strong plasticizing effect of water was confirmed by DMA. Carbonate and bicarbonate exchanged membranes revealed an ionomer peak around 0.25 Å<sup>-</sup><sup>1</sup> in SAXS measurements suggesting a phase separated morphology. Theoretical DFT calculations were used to characterize geometries and electronic structure of polymer models and interactions with different anions, and to rationalize the water uptake/swelling behavior. Anion exchange membranes are prepared from methylated polybenzimidazole and are exchanged with various anions. Thermal and mechanical properties are evaluated. Unlike other anions, carbonate and bicarbonate exchanged membranes reveal an ionomer peak in SAXS measurements suggesting a phase separated morphology. Water uptake and swelling behavior are rationalized by theoretical DFT calculations.

Original languageEnglish
Pages (from-to)497-509
Number of pages13
JournalMacromolecular Materials and Engineering
Volume300
Issue number5
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Carbonates
Anions
Ion exchange
Negative ions
Membranes
Bicarbonates
Swelling
Ionomers
Water
Discrete Fourier transforms
Chlorides
Methylation
Iodides
Dynamic mechanical analysis
Electronic structure
Polymers
Anisotropy
Thermodynamic properties
Mechanical properties
Geometry

Keywords

  • Anion exchange membranes
  • Computer modeling
  • Ion exchange
  • Mechanical properties
  • Thermal properties

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

Cite this

Germer, W., Leppin, J., Kirchner, C. N., Cho, H., Kim, H. J., Henkensmeier, D., ... Dyck, A. (2015). Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes. Macromolecular Materials and Engineering, 300(5), 497-509. https://doi.org/10.1002/mame.201400345

Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes. / Germer, Wiebke; Leppin, Janine; Kirchner, Carolina Nunes; Cho, Hyeongrae; Kim, Hyoung Juhn; Henkensmeier, Dirk; Lee, Kwan Young; Brela, Mateusz; Michalak, Artur; Dyck, Alexander.

In: Macromolecular Materials and Engineering, Vol. 300, No. 5, 01.05.2015, p. 497-509.

Research output: Contribution to journalArticle

Germer, W, Leppin, J, Kirchner, CN, Cho, H, Kim, HJ, Henkensmeier, D, Lee, KY, Brela, M, Michalak, A & Dyck, A 2015, 'Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes', Macromolecular Materials and Engineering, vol. 300, no. 5, pp. 497-509. https://doi.org/10.1002/mame.201400345
Germer, Wiebke ; Leppin, Janine ; Kirchner, Carolina Nunes ; Cho, Hyeongrae ; Kim, Hyoung Juhn ; Henkensmeier, Dirk ; Lee, Kwan Young ; Brela, Mateusz ; Michalak, Artur ; Dyck, Alexander. / Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes. In: Macromolecular Materials and Engineering. 2015 ; Vol. 300, No. 5. pp. 497-509.
@article{1d57515675144ee686dee9117eb4932a,
title = "Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes",
abstract = "Methylated polybenzimidazole (O-PBI) based anion exchange membranes with a degree of methylation of ca. 78{\%} were prepared in the iodide, chloride, carbonate, bicarbonate, and hydroxide form. Swelling in water showed a high anisotropy for chloride and carbonate exchanged membranes and a strong plasticizing effect of water was confirmed by DMA. Carbonate and bicarbonate exchanged membranes revealed an ionomer peak around 0.25 {\AA}-1 in SAXS measurements suggesting a phase separated morphology. Theoretical DFT calculations were used to characterize geometries and electronic structure of polymer models and interactions with different anions, and to rationalize the water uptake/swelling behavior. Anion exchange membranes are prepared from methylated polybenzimidazole and are exchanged with various anions. Thermal and mechanical properties are evaluated. Unlike other anions, carbonate and bicarbonate exchanged membranes reveal an ionomer peak in SAXS measurements suggesting a phase separated morphology. Water uptake and swelling behavior are rationalized by theoretical DFT calculations.",
keywords = "Anion exchange membranes, Computer modeling, Ion exchange, Mechanical properties, Thermal properties",
author = "Wiebke Germer and Janine Leppin and Kirchner, {Carolina Nunes} and Hyeongrae Cho and Kim, {Hyoung Juhn} and Dirk Henkensmeier and Lee, {Kwan Young} and Mateusz Brela and Artur Michalak and Alexander Dyck",
year = "2015",
month = "5",
day = "1",
doi = "10.1002/mame.201400345",
language = "English",
volume = "300",
pages = "497--509",
journal = "Macromolecular Materials and Engineering",
issn = "1438-7492",
publisher = "Wiley-VCH Verlag",
number = "5",

}

TY - JOUR

T1 - Phase separated methylated polybenzimidazole (O-PBI) based anion exchange membranes

AU - Germer, Wiebke

AU - Leppin, Janine

AU - Kirchner, Carolina Nunes

AU - Cho, Hyeongrae

AU - Kim, Hyoung Juhn

AU - Henkensmeier, Dirk

AU - Lee, Kwan Young

AU - Brela, Mateusz

AU - Michalak, Artur

AU - Dyck, Alexander

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Methylated polybenzimidazole (O-PBI) based anion exchange membranes with a degree of methylation of ca. 78% were prepared in the iodide, chloride, carbonate, bicarbonate, and hydroxide form. Swelling in water showed a high anisotropy for chloride and carbonate exchanged membranes and a strong plasticizing effect of water was confirmed by DMA. Carbonate and bicarbonate exchanged membranes revealed an ionomer peak around 0.25 Å-1 in SAXS measurements suggesting a phase separated morphology. Theoretical DFT calculations were used to characterize geometries and electronic structure of polymer models and interactions with different anions, and to rationalize the water uptake/swelling behavior. Anion exchange membranes are prepared from methylated polybenzimidazole and are exchanged with various anions. Thermal and mechanical properties are evaluated. Unlike other anions, carbonate and bicarbonate exchanged membranes reveal an ionomer peak in SAXS measurements suggesting a phase separated morphology. Water uptake and swelling behavior are rationalized by theoretical DFT calculations.

AB - Methylated polybenzimidazole (O-PBI) based anion exchange membranes with a degree of methylation of ca. 78% were prepared in the iodide, chloride, carbonate, bicarbonate, and hydroxide form. Swelling in water showed a high anisotropy for chloride and carbonate exchanged membranes and a strong plasticizing effect of water was confirmed by DMA. Carbonate and bicarbonate exchanged membranes revealed an ionomer peak around 0.25 Å-1 in SAXS measurements suggesting a phase separated morphology. Theoretical DFT calculations were used to characterize geometries and electronic structure of polymer models and interactions with different anions, and to rationalize the water uptake/swelling behavior. Anion exchange membranes are prepared from methylated polybenzimidazole and are exchanged with various anions. Thermal and mechanical properties are evaluated. Unlike other anions, carbonate and bicarbonate exchanged membranes reveal an ionomer peak in SAXS measurements suggesting a phase separated morphology. Water uptake and swelling behavior are rationalized by theoretical DFT calculations.

KW - Anion exchange membranes

KW - Computer modeling

KW - Ion exchange

KW - Mechanical properties

KW - Thermal properties

UR - http://www.scopus.com/inward/record.url?scp=84928924601&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928924601&partnerID=8YFLogxK

U2 - 10.1002/mame.201400345

DO - 10.1002/mame.201400345

M3 - Article

AN - SCOPUS:84928924601

VL - 300

SP - 497

EP - 509

JO - Macromolecular Materials and Engineering

JF - Macromolecular Materials and Engineering

SN - 1438-7492

IS - 5

ER -