Abstract:

In this work, the nano-molecule C₆₀(EDA)₈ was synthesized by the fullerene C₆₀ and ethylenediamine, which was used as rigid crosslinking agent to crosslink polyphenylene oxide (PPO) with triple quaternary ammonium groups for the preparation of high-performance anion exchange membranes. With the rigid structure of C₆₀ in C₆₀(EDA)₈, it effectively supports the polymer chain segment and builds a wider ion channel, thereby reducing membrane swelling and improving conductivity. The experimental results show that with the increase of C₆₀(EDA)₈ input, the ion exchange capacity(IEC) of the cross-linked membrane decreases, but the conductivity gradually increases. When the crosslinking agent C₆₀(EDA)₈ is added at 5%, the conductivity of the membrane increases 34%. In addition, the prepared crosslinked membranes all show good swelling resistance, mechanical properties and alkaline stability.

Key words: fuel cell, anion exchange membrane, fullerene, polyphenylene oxide, crosslinked membrane

摘要：

通过富勒烯C₆₀与乙二胺合成立体纳米分子C₆₀(EDA)₈，并以此为交联剂与三阳离子功能化聚苯醚制备了一系列交联型阴离子交换膜。C₆₀(EDA)₈中立体纳米结构有效地支撑了高分子链段，构建了更发达的离子通道，有效地提升了电导率。实验结果表明，随着C₆₀(EDA)₈加入量增加，交联膜的离子交换容量减小，而电导率却逐渐增加。当交联剂C₆₀(EDA)₈加入量为5%时，电导率提高了34%。此外，所制备的离子交换膜均表现出良好的抗溶胀能力、力学性能与耐碱性。

关键词: 燃料电池, 阴离子交换膜, 富勒烯, 聚苯醚, 交联膜