Chemical Papers

, Volume 73, Issue 2, pp 447–454 | Cite as

Preparation and characterization of heterogeneous weak base anion-exchange membranes

  • Eliška StránskáEmail author
  • Kristýna Weinertová
  • David Neděla
  • Jan Křivčík
  • Natália Václavíková
Original Paper


The preparation of new heterogeneous anion-exchange membranes containing particles of a weak basic ion-exchange resin in a polypropylene matrix is described. For comparison, a heterogeneous membrane consisting of a strong basic functional group was also prepared. The anion-exchange membranes were prepared in a laboratory discontinuous homogenizer and extruder followed by compression of extruded membranes to ensure the homogeneity of the test sample. Parameters important for a subsequent transfer of production from laboratory to an industrial scale, torque and head pressure, were observed. Electrochemical and mechanical properties of resulting membranes, in particular their ion-exchange capacity, areal and specific resistances, permselectivies, swelling in water, 1 mol dm−3 NaOH, and 1 mol dm−3 HCl solution, were determined. Weak basic ion-exchange resin Purolite A830 behaved similarly as the strong basic ion-exchange resin during processing, and the resulting membrane showed similar electrochemical and physical properties. The heterogeneous anion-exchange membranes with other weak basic anion-exchange resins showed unsuitable swelling, which was reflected in electrochemical properties of these ion-exchange membranes.


Weak base anion-exchange membrane Heterogeneous membrane Characterization of ion-exchange membrane 

List of symbols


Current (A)


Ion-exchange capacity (meq g−1)


Permselectivity (%)


Areal resistance (Ω cm2)


Specific resistance (Ω cm)


Active area (cm2)


Thickness (cm)


Potential (V)


Dimensional changes in length (%)


Dimensional changes in thickness (%)


Dimensional changes in width (%)


Strain (%)


Stress (MPa)



Ion-exchange membrane







The work was carried out within the framework of project no. LO1418 “Progressive development of Membrane Innovation Centre” supported by the program NPU I Ministry of Education Youth and Sports of the Czech Republic, using the infrastructure of the Membrane Innovation Centre.


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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2018

Authors and Affiliations

  1. 1.MemBrain s.r.oStráž pod RalskemCzech Republic

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