Detail publikace

Variations in anion-exchange membrane properties with ionic resin moisture

BULEJKO, P. STRÁNSKÁ, E.

Anglický název

Variations in anion-exchange membrane properties with ionic resin moisture

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

Moisture content in a strongly hydrophilic ion-exchange resin is one of the key parameters in commercial production of ion-exchange membranes. This work tried to clarify the effect of moisture content in an anion-exchange resin (AER) on the structure and final properties of anion-exchange membranes (AEMs). The AER was modified to 2, 4, 6 and 8% of moisture and then grinded. The modified AER was blended with polyethylene and extruded to prepare AEMs, some of which were hot-pressed. The microstructure and electrochemical properties of the AEMs were then characterized. Variations in electrochemical properties showed no definite moisture effect except ion exchange capacity, which decreased as AER moisture increased. The differences in changes in electrochemical properties were most apparent between pressed and non-pressed AEMs. Permselectivity and ionic resistance behaved similarly with AEMs fixed ion concentration. The ionic resistance decreased with increasing fixed ion concentration. The same was true for permselectivity which is, however, in contradiction to Donnan theory.

Anglický abstrakt

Moisture content in a strongly hydrophilic ion-exchange resin is one of the key parameters in commercial production of ion-exchange membranes. This work tried to clarify the effect of moisture content in an anion-exchange resin (AER) on the structure and final properties of anion-exchange membranes (AEMs). The AER was modified to 2, 4, 6 and 8% of moisture and then grinded. The modified AER was blended with polyethylene and extruded to prepare AEMs, some of which were hot-pressed. The microstructure and electrochemical properties of the AEMs were then characterized. Variations in electrochemical properties showed no definite moisture effect except ion exchange capacity, which decreased as AER moisture increased. The differences in changes in electrochemical properties were most apparent between pressed and non-pressed AEMs. Permselectivity and ionic resistance behaved similarly with AEMs fixed ion concentration. The ionic resistance decreased with increasing fixed ion concentration. The same was true for permselectivity which is, however, in contradiction to Donnan theory.

Klíčová slova anglicky

Anion-exchange membrane, moisture, permselectivity, electrical resistance, microstructure

Vydáno

16.04.2019

Nakladatel

Springer

Místo

Německo

ISSN

0947-7047

Ročník

25

Číslo

9

Strany od–do

4251–4263

Počet stran

13

BIBTEX


@article{BUT156343,
  author="Pavel {Bulejko},
  title="Variations in anion-exchange membrane properties with ionic resin moisture",
  year="2019",
  volume="25",
  number="9",
  month="April",
  pages="4251--4263",
  publisher="Springer",
  address="Německo",
  issn="0947-7047"
}