Inorganic free radical scavengers are used to suppress the radical attack and chemical degradation of perfluorosulfonic acid (PSFA) ionomer membranes. However, the commercially available radical scavengers have the shortcomings of nano dispersibility and formation of ionically crosslinked complexes with PSFA chains resulting in aggregation and reduced chemical stability. In this study, a new strategy to synthesize highly dispersible metal oxide-ionomer (MO-I) nanocomposite particles using various equivalent weight (EW) of ionomers, is addressed for obtaining effective radical scavengers which ensure the re-dispersibility and colloidal stability in the ionomer dispersions. The effect of the EW of the ionomer and selection of metal precursors on the solubility of metal precursors in the ionomer solution, the solubility of ionomer in the solvent, re-dispersibility, and colloidal stability of MO-I nanocomposite particles in the ionomer solution were also studied. Under given conditions, it was proved that MO-I nanocomposite particles prepared by using cerium nitrate precursor showed the best radical scavenging performance in the presence of EW800 ionomer solution.

无机自由基清除剂用于抑制全氟磺酸 (PSFA) 离聚物膜的自由基攻击和化学降解。然而，市售的自由基清除剂具有纳米分散性和与 PSFA 链形成离子交联复合物的缺点，导致聚集和化学稳定性降低。在这项研究中，提出了一种使用各种当量 (EW) 离聚物合成高分散性金属氧化物-离聚物 (MO-I) 纳米复合颗粒的新策略，旨在获得有效的自由基清除剂，以确保其再分散性和胶体稳定性。离聚物分散体。离聚物的 EW 和金属前体的选择对金属前体在离聚物溶液中的溶解度、离聚物在溶剂中的溶解度的影响，还研究了 MO-I 纳米复合颗粒在离聚物溶液中的再分散性和胶体稳定性。在给定条件下，证明了使用硝酸铈前驱体制备的MO-I纳米复合颗粒在EW800离聚物溶液存在下表现出最佳的自由基清除性能。