Contribution information

Title The Ion Exchange Capacity of Polyelectrolyte Multilayer Nanofiltration Membranes: the effect of ionic strength, layer number and the practical implications thereof
Status Accepted
Final type Lecture
Final session PERMEA 2022 - Membrane development and modelling
Authors Á., Bóna1, I., Galambos2, N., Nemestothy3
1 Soós Research and Development Center, University of Pannonia , Nagykanizsa, Hungary
2 University of Pannonia, Nagykanizsa, Hungary
3 University of Pannonia, Veszprém, Hungary
Uploaded abstract link
Brief content The Layer-by-Layer (LbL) assembly method to build NF membranes on UF and MF substrates has become a staple in membrane fabrication technology, leading to highly selective and robust membranes. By controlling the synthesis parameters, the selectivity and permeability of these membranes can be fine-tuned to a high degree. The polyelectrolyte anions and cations bind together with Coulomb bonds in these membranes to form a dense active layer, however some charges remain unbound, which leads to ion exchange sites. The ion exchange capacity of these membranes can have a significant effect on the measured salt rejections (by conductivity) in some circumstances, which can lead to the distortion of the results.
ID 458