T. Hosono et A. Tanioka, EFFECT OF POLYMER COMPOSITION IN INTERMEDIATE LAYER ON WATER-SPLITTING IN BIPOLAR MEMBRANES, Polymer, 39(18), 1998, pp. 4199-4204
relationship between the water splitting effects and the chemical comp
osition of the intermediate layer has been studied. Firstly, the membr
ane resistance decreases if a quaternary ammonium group or a carboxyl
group is inserted in the intermediate layer instead of a secondary or
tertiary amino group, which implies that the water dissociation occurs
not only due to the catalytic effect of the secondary or tertiary ami
no group but also to the electrical field. Secondly, it is proved that
the current efficiency is determined by the ion exchange capacity in
the anion and cation exchange layers, but not by the chemical structur
e of intermediate layer. Thirdly, it is also evidenced that the membra
ne which has a thick intermediate layer showed a high conductivity bef
ore the critical point of thickness of the intermediate layer, which m
eans an increase in the reactive region of the water. In this study, w
e could not find evidence that the chemical reaction model is superior
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