Ion-exchange polymer SPEEK has been used as membrane material in proton exchange membranes and microfiltration/ultrafiltration /nanofiltration membranes. In the present study, SPEEK was synthesized by sulfonating of PEEK, afterward the SPEEKs were applied to prepare dense SPEEK/PES composite membranes for pervaporative desalination. Properties of the SPEEKs including thermal stability, ion exchange capacity and water uptake were measured. The SPEEK/PES membrane morphology and hydrophilicity were characterized. Influences of membrane prepare conditions (polymer concentration in supporting membrane, thickness of supporting membrane, sulfonation degree of SPEEK, coating layers and SPEEK concentration) and the pervaporation parameters (NaCl concentration and feed temperature) on the pervaporative desalination performance were studied. The SPEEK/PES composite membranes show high water flux up to 6 L/m²*h and salt rejection > 99.9%. During 40 h pervaporation for different NaCl concentrations (10–100 g/L) and temperatures (50–70 °C), the rejection maintains >99.9%. The permeate flux ranges to 2–6 L/m² * h, depending on feed concentration and temperature. The total salt rejection of composite membranes is not affected by temperature and feed concentration, attributing to the supper hydrophilicity and stability of SPEEK. The results indicate that SPEEK could be considered as a candidate material for pervaporative desalination membrane.

离子交换聚合物SPEEK已用作质子交换膜和微滤/超滤/纳滤膜的膜材料。在本研究中，通过将PEEK磺化合成SPEEK，然后将SPEEK用于制备致密的SPEEK / PES复合膜用于全蒸发淡化。测量了SPEEK的性能，包括热稳定性，离子交换容量和吸水率。表征了SPEEK / PES膜的形态和亲水性。研究了膜制备条件（支撑膜中的聚合物浓度，支撑膜的厚度，SPEEK的磺化度，涂层和SPEEK浓度）以及渗透参数（NaCl浓度和进料温度）对渗透蒸发脱盐性能的影响。² * h，脱盐率> 99.9％。在不同浓度的NaCl（10-100 g / L）和温度（50-70°C）的全蒸发40 h期间，截留率保持> 99.9％。渗透通量范围为2–6 L / m ²  * h，具体取决于进料浓度和温度。复合膜的总脱盐率不受温度和进料浓度的影响，这归因于SPEEK的超强亲水性和稳定性。结果表明，SPEEK可以被认为是渗透汽化淡化膜的候选材料。