Availability of fresh water is a serious concern due water pollution in these days. Several efforts have been made for water desalination where membrane based technology is considered prominently. Here, we synthesised sulfonated poly ether ether ketone (SPEEK) based functionalized hexagonal boron nitride (SBN) composite cation exchange membranes for water desalination. The morphology of BN and presence of sulfonic acid group are confirmed by TEM analysis. Ionic conductivity for SPEEK membrane is found to be 2.02 × 10⁻² S. cm⁻¹, which reaches to 4.05 × 10⁻² S. cm⁻¹ for SBN-10/SPEEK composite membrane. Ion exchange capacity of the SBN-10/SPEEK composite membrane also increased by 40 % and reaches to 1.66 meq.g^-1 as compared to SPEEK membrane. Incorporation of SBN in membrane matrix not only improve the ion exchange capacity and ionic conductivity as well as expand the stability of the membranes. SEM micrograph confirm the uniform distribution of SBN in SPEEK membrane matrix. The composite membranes show the better ion transport properties in term of current efficiency and power consumption during salt removal from brackish water by electrodialysis. For SBN-10/SPEEK composite membrane power consumption was 0.75 kW h.Kg^-1 with 98.5 % current efficiency.

由于这些天的水污染，淡水的可用性是一个严重的问题。对于基于膜技术的水脱盐已经做出了一些努力。在这里，我们合成了用于水脱盐的磺化聚醚醚酮（SPEEK）基功能化六方氮化硼（SBN）复合阳离子交换膜。通过TEM分析证实了BN的形态和磺酸基的存在。发现SPEEK膜的离子电导率为2.02×10 ^-2 S.cm ^-1，对于SBN-10 / SPEEK复合膜达到4.05×10 ^-2 S.cm ^-1。SBN-10 / SPEEK复合膜的离子交换容量也增加了40％，达到1.66 meq.g ^-1与SPEEK膜相比。在膜基质中掺入SBN不仅可以改善离子交换能力和离子电导率，还可以扩大膜的稳定性。SEM显微照片证实了SBN在SPEEK膜基质中的均匀分布。在通过电渗析从微咸水中去除盐的过程中，就电流效率和功率消耗而言，复合膜表现出更好的离子传输性能。对于SBN-10 / SPEEK复合膜，功耗为0.75 kW h.Kg ^-1，电流效率为98.5％。