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首页> 美国卫生研究院文献>Polymers >Constructing Continuous Proton-Conducting Highways within Sulfonated Poly(Arylene Ether Nitrile) Composite Membrane by Incorporating Amino-Sulfo-Bifunctionalized GO
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Constructing Continuous Proton-Conducting Highways within Sulfonated Poly(Arylene Ether Nitrile) Composite Membrane by Incorporating Amino-Sulfo-Bifunctionalized GO

机译：通过结合氨基-磺基-双官能化的GO在磺化的聚（亚芳基醚腈）复合膜中构建连续的质子传导高速公路

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摘要

To obtain a proton exchange membrane (PEM) with high proton conductivity and low methanol permeability, a novel amino-sulfo-bifunctionalized GO (NSGO) was synthesized and explored as a filler for sulfonated poly(arylene ether nitrile) (SPEN). The result indicated that the microstructure of composite membranes was rearranged by NSGO and strong acid–base interactions were formed between fillers and the SPEN matrix, affording enhanced thermal, mechanical, and dimensional stabilities. Moreover, it was found that NSGO fillers were uniformly dispersed in the SPEN matrix, generating efficient proton-conducting paths along the SPEN/NSGO interface. Meanwhile, the sulfonic and amino groups of NSGO served as additional proton hopping sites to connect the ionic clusters in the SPEN matrix, creating interconnected and long-range ionic pathways. In such a way, proton-conducting highways with low energy barriers are constructed, which enhance the proton conductivity of the composite membranes via the Grotthuss mechanism. Furthermore, the composite membranes also effectively prevent methanol permeation, and therefore high selectivity (the ratio of proton conductivity and methanol permeability) is endowed. Compared to SPEN membrane, a 3.6-fold increase in selectivity is obtained for the optimal composite membrane. This study will provide a new strategy for the preparation of high-performance PEM.
机译：为了获得具有高质子传导性和低甲醇渗透性的质子交换膜（PEM），合成了一种新型的氨基-磺基双官能GO（NSGO），并作为磺化聚（亚芳基醚腈）（SPEN）的填料进行了研究。结果表明，NSGO重新排列了复合膜的微观结构，填料与SPEN基质之间形成了强酸碱相互作用，从而增强了热，机械和尺寸稳定性。此外，发现NSGO填料均匀地分散在SPEN基质中，沿着SPEN / NSGO界面生成了有效的质子传导路径。同时，NSGO的磺酸基和氨基基团充当附加的质子跳跃位点，以连接SPEN矩阵中的离子簇，从而形成相互连接的远程离子通道。以此方式，构建了具有低能量屏障的质子传导高速公路，其通过格罗特斯机制提高了复合膜的质子传导性。此外，复合膜还有效地防止了甲醇渗透，因此赋予了高选择性（质子传导率与甲醇渗透率之比）。与SPEN膜相比，最佳复合膜的选择性提高了3.6倍。这项研究将为制备高性能PEM提供新的策略。

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