Stigated: (i) multiblock-co-ionomers depending on aromatic main-chain polymers and (ii) acid
Stigated: (i) multiblock-co-ionomers according to aromatic main-chain polymers and (ii) acid ase blend membranes determined by (hetero)aromatic polymers including sulfonated polyethers, and polybenzimidazoles and pyridine-modified polyethersulfone because the standard blend elements. The benefit of multiblock-co-ionomers is their nanophase-separated morphology. Even though homo-ionomers are composed of a single single phase, which is either hugely protonconductive using a good ion exchange AAPK-25 In stock capacity (IEC) and, consequently, an immense water uptake, or less conductive and, therefore, far more mechanically steady. In contrast to that, multiblock-co-ionomers permit for supplies with tuned properties by combining those on the person homoblocks in a microphase separated method. Therefore, supplies with each higher mechanical stability also as very good proton conductivity is usually tailored [237]. The second proton-conducting ionomer kind selected for this study, ionically crosslinked blend ionomer membranes depending on aromatic main-chain polymers, has been investigated by the Kerres group at ICVT Stuttgart for the last two decades as a consequence of theirPolymers 2021, 13, x FOR PEER REVIEW3 ofPolymers 2021, 13,The second proton-conducting ionomer type chosen for this study, ionically cross3 of 19 linked blend ionomer membranes based on aromatic main-chain polymers, has been investigated by the Kerres group at ICVT Stuttgart for the last two decades as a consequence of their advantageous properties, for instance enhanced proton conductivity, and enhanced chemical advantageous properties, for instance enhanced proton conductivity, and [281]. chemical and mechanical stabilities, compared to their homo-ionomer analogsimprovedThe acidand blend membranes have been applied to homo-ionomer analogs [281]. The acidbase mechanical stabilities, compared to their low-[32] and intermediate temperature H2 base blend membranes have been applied to low-[32] and intermediate temperature H2 fuel cells [33], perstractive alkene/alkane separation [34], and direct ML-SA1 site methanol fuel cells fuel cells [33], perstractive H2-depolarized SO2 electrolysis [36] and methanol batteries (DMFC) [35], too as in alkene/alkane separation [34], and directredox-flow fuel cells (DMFC) [35], at the same time as in H2 -depolarized SO2 electrolysis [36] and redox-flow batteries [37]. [37]. Blend membranes composed of aromatic multiblock-co-ionomers and polybenzimBlend membranes composed of aromatic multiblock-co-ionomers and polybenzimidazole idazole have been previously applied to DMFC, top to improved performance compared had been previously applied to DMFC, leading to improved overall performance in comparison with PFSAs to PFSAs and pure multiblock-co-ionomers [38]. For the very best of our know-how, multiand pure multiblock-co-ionomers [38]. For the very best of our expertise, multiblock-coblock-co-ionomers and acid ase blend membranes have, so far, not been investigated in ionomers and acid ase blend membranes have, so far, not been investigated in PEMWE, PEMWE, that is the goal of this study. which can be the goal of this study. two. Components and Strategies two. Materials and Methods 2.1. Polymer Synthesis 2.1. Polymer Synthesis two.1.1. Multiblock-co-Ionomers (MBI)multiblock-co-ionomers were ready a a two-step process: very first, hydroThe multiblock-co-ionomers have been prepared inin two-step procedure: 1st, the the hydrophilic and hydrophobic blocks had been synthesized separately, followed by the blocks’ philic and hydrophobic blocks have been synthesized separately, followed by the blocks’ coucoupling in.