Salarizadeh Parisa, Javanbakht Mehran, Askari Mohammad Bagher, Hooshyari Khadijeh, Moradi Morteza, Beydaghi Hossein, Rastgoo-Deylami Mohadese, Enhessari Morteza
High-Temperature Fuel Cell Research Department, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Department of Chemistry, Amirkabir University of Technology, 1599637111, Tehran, Iran.
Sci Rep. 2021 Mar 1;11(1):4926. doi: 10.1038/s41598-021-84321-7.
In this study, new nanocomposite membranes from sulfonated poly (ether ether ketone) (SPEEK) and proton-conducting FeTiO nanoparticles are prepared by the solution casting method. Sulfonated core-shell FeTiO nanoparticles are synthesized by redox polymerization. Therefore, 4-Vinyl benzene sulfonate (VBS) and 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) are grafted on the surface of nanoparticles through radical polymerization. The different amounts of hybrid nanoparticles (PAMPS@FeTiO and PVBS@FeTiO) are incorporated into the SPEEK matrix. The results show higher proton conductivity for all prepared nanocomposites than that of the SPEEK membrane. Embedding the sulfonated FeTiO nanoparticles into the SPEEK membrane improves proton conductivity by creating the new proton conducting sites. Besides, the nanocomposite membranes showed improved mechanical and dimensional stability in comparison with that of the SPEEK membrane. Also, the membranes including 2 wt% of PAMPS@FeTiO and PVBS@FeTiO nanoparticles indicate the maximum power density of 247 mW cm and 226 mW cm at 80 °C, respectively, which is higher than that of for the pristine membrane. Our prepared membranes have the potential for application in polymer electrolyte fuel cells.
在本研究中，通过溶液浇铸法制备了由磺化聚醚醚酮（SPEEK）和质子传导性FeTiO纳米颗粒组成的新型纳米复合膜。磺化核壳FeTiO纳米颗粒通过氧化还原聚合合成。因此，4-乙烯基苯磺酸盐（VBS）和2-丙烯酰胺-2-甲基-1-丙烷磺酸（AMPS）通过自由基聚合接枝到纳米颗粒表面。将不同量的杂化纳米颗粒（PAMPS@FeTiO和PVBS@FeTiO）掺入SPEEK基质中。结果表明，所有制备的纳米复合材料的质子传导率均高于SPEEK膜。将磺化FeTiO纳米颗粒嵌入SPEEK膜中，通过创建新的质子传导位点提高了质子传导率。此外，与SPEEK膜相比，纳米复合膜的机械稳定性和尺寸稳定性有所提高。而且，包含2 wt% PAMPS@FeTiO和PVBS@FeTiO纳米颗粒的膜在80°C时的最大功率密度分别为247 mW/cm²和226 mW/cm²，高于原始膜。我们制备的膜具有在聚合物电解质燃料电池中应用的潜力。
