Abstract Current study demonstrate the alternative route for synthesis of interpenetrating network (IPN) type composite cation exchange membranes (CEM) based on PVC-St/DVB with different content sulfonated graphene oxide (SGO) via simple solution casting method. First, the synthesis of GO was confirmed by TEM and XRD analysis. Functional group characterization of GO and SGO was done by using FT-IR spectroscopy. Water content related assets like water uptake, linear expansion ratio, and ion transport properties like: ion exchange capacity, ionic conductivity of composite IPN membranes were evaluated. Ion exchange capacity and ionic conductivity for PM-5 IPN CEM was found to highest with values of 1.76 meq/g and 4.7 × 10−3 S/cm, respectively. Thermal and mechanical stabilities of prepared membrane were characterized by TGA, DSC, DMA and UTM analysis. Composite interpenetrating network cation exchange membranes (IPN CEM) show better thermal and mechanical stability in comparison with virgin membrane. The suitability of synthesized composite IPN membranes towards electro-membrane processes was evaluated against salt removal by electrodialysis for water desalination. Power consumption and current efficiency during salt removal for PM-5 IPN CEM composite membrane was found to be 1.07 kWh/kg and 82% respectively which was superior among the IPN membrane.

中文翻译：

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SGO 复合互穿网络 (CIPN) 阳离子交换膜的合成：稳定性和除盐效率

摘要 目前的研究证明了通过简单的溶液浇铸法合成基于具有不同含量磺化氧化石墨烯 (SGO) 的 PVC-St/DVB 的互穿网络 (IPN) 型复合阳离子交换膜 (CEM) 的替代路线。首先，通过TEM和XRD分析证实了GO的合成。GO 和 SGO 的官能团表征是通过使用 FT-IR 光谱进行的。评估了与水含量相关的资产，例如吸水率、线性膨胀率和离子传输特性，例如：复合 IPN 膜的离子交换容量、离子电导率。PM-5 IPN CEM 的离子交换容量和离子电导率最高，分别为 1.76 meq/g 和 4.7 × 10-3 S/cm。通过 TGA、DSC、DMA 和 UTM 分析表征所制备膜的热稳定性和机械稳定性。与原始膜相比，复合互穿网络阳离子交换膜 (IPN CEM) 显示出更好的热稳定性和机械稳定性。合成的复合 IPN 膜对电膜工艺的适用性通过电渗析去除盐进行水脱盐评估。PM-5 IPN CEM复合膜除盐过程中的功耗和电流效率分别为1.07 kWh/kg和82%，优于IPN膜。