Hybrid anion exchange membranes with adjustable ion transport channels designed by compounding SEBS and homo‐polystyrene,Journal of Applied Polymer Science

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Hybrid anion exchange membranes with adjustable ion transport channels designed by compounding SEBS and homo‐polystyrene
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-02-03 , DOI: 10.1002/app.50540
Yue Shi ₁ , Fanzhi Meng ₁ , Zhongfu Zhao ₁ , Wei Liu ₁ , Chunqing Zhang ₁

Affiliation

Hybrid anion exchange membranes (AEMs) were prepared via chemically functionalizing and crosslinking poly(styrene‐b‐[ethylene‐co‐butylene]‐b‐styrene) (SEBS) copolymers and low molecular weight homo‐polystyrene (hPS). Via sequential chloromethylation, crosslinking, quaternization, and alkalization, a series of hPS/SEBS AEMs were obtained with varying content of hPS. Systematic structural, morphological, mechanical, absorption, and transport measurements reveal that these properties depend on the total PS content in the membranes. Particularly, increasing total PS content causes (a) PS domains in the AEMs transition the cylindrical morphology to lamella‐like morphology with comparable correlation length; (b) Young's modulus, water uptake, swelling ratio, ionic exchange capacity and ionic conductivity of the AEMs, and T_g of PS phase increase. In addition, the alkaline stability of the hPS/SEBS AEMs is also improved by addition of hPS. These findings suggest that the proposed method can develop high performance SEBS AEMs that are suitable for fuel cell applications.

中文翻译：

通过将SEBS和均聚苯乙烯混合设计的具有可调节离子传输通道的混合阴离子交换膜

杂化阴离子交换膜（AEM）是通过对聚（苯乙烯-b- [乙烯-共丁烯] -b-苯乙烯）（SEBS）共聚物和低分子量均聚苯乙烯（hPS）进行化学官能化和交联而制备的。通过顺序的氯甲基化，交联，季铵化和碱化，获得了一系列具有不同hPS含量的hPS / SEBS AEM。系统的结构，形态，机械，吸收和转运测量表明，这些性质取决于膜中总PS含量。特别是，总PS含量的增加导致（a）AEM中的PS结构域将圆柱状形态转变为具有可比的相关长度的薄片状形态；（b）AEM和T的杨氏模量，吸水率，溶胀率，离子交换容量和离子电导率PS相的_g增加。另外，hPS / SEBS AEM的碱性稳定性也可以通过添加hPS来提高。这些发现表明，所提出的方法可以开发适用于燃料电池应用的高性能SEBS AEM。

更新日期：2021-03-07

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