Data underlying the publication: Improving the fixed charge density of sustainably produced saloplastic anion exchange membranes

This dataset supports the study aimed at enhancing the fixed charge density of saloplastic anion exchange membranes derived from non-stoichiometric PSS–PDADMAC polyelectrolyte complexes (PECs). The strategy involved overcharging the complexes with PDADMAC during the complexation step. Five different PECs were prepared with 0, 10, 20, 30, and 40 mol% excess and hot-pressed into thin, dense films. Nuclear Magnetic Resonance (NMR) spectroscopy was used to accurately determine the polyelectrolyte molar ratios in the membranes, which enabled calculation of their ion exchange capacity (IEC). Water uptake experiments assessed the swelling behavior of the membranes, and these results, combined with IEC data, were used to calculate fixed charge densities. Finally, permselectivity and conductivity tests were conducted in varying KCl electrolyte concentrations (0.1, 0.3, and 0.5 M) to evaluate membrane performance and examine the influence of salt concentration and fixed charge density.

本数据集支撑了一项旨在提升由非化学计量比PSS-PDADMAC聚电解质复合物（PECs）制备的盐塑型阴离子交换膜固定电荷密度的研究。该研究采用的策略为：在复合物复合阶段引入过量PDADMAC，使复合物带上过量电荷。研究人员制备了5组不同的PECs，其PDADMAC过量摩尔百分比分别为0、10、20、30和40，随后通过热压工艺制成致密薄膜。采用核磁共振（NMR）波谱法精准测定膜内聚电解质的摩尔比，进而计算得到其离子交换容量（IEC）。通过吸水率实验表征膜的溶胀行为，结合IEC数据计算固定电荷密度。最后，在浓度分别为0.1、0.3、0.5 M的氯化钾电解质溶液中开展选择透过性与电导率测试，以评估膜的性能，并探究盐浓度与固定电荷密度的影响。