Preparation and characterization of a novel polyethersulfone (PES) ultrafiltration membrane modified with a CuO/ZnO nanocomposite to improve permeability and antifouling properties
Preparation and characterization of a novel polyethersulfone (PES) ultrafiltration membrane modified with a CuO/ZnO nanocomposite to improve permeability and antifouling properties
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DOI：
10.1016/j.seppur.2017.10.034
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发表时间：
2018-02-09
影响因子：
8.6
通讯作者：
Mahmoodi, Niyaz Mohammad
中科院分区：
文献类型：
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作者：
Nasrollahi, Nazanin;Vatanpour, Vahid;Mahmoodi, Niyaz Mohammad
采用非溶剂诱导相转化法制备了不同含量CuO/ZnO（CZN）纳米复合材料共混的聚醚砜（PES）超滤膜。ZnO纳米粒子的高亲水性使其成为与CuO纳米粒子结合以作为纳米填料添加剂改善膜性能的极好选择。采用扫描电子显微镜（SEM）、原子力显微镜（AFM）、平均孔径测量、水接触角和能量色散X射线（EDX）对膜进行表征。横截面SEM图像显示，通过添加高达0.2wt%的CZN，膜的形态几乎没有从指状结构改变为大孔结构的趋势。然而，通过进一步增加CZN，孔隙率降低。CZN的均匀分布和无团聚，这可以在表面SEM图像中看到，是CZN和聚合物基体之间的适当依赖性的结果。EDX分析显示纳米颗粒在PES基质中均匀分散。AFM图像还表明，表面粗糙度没有改变显着的CZN浓度。然而，计算的粗糙度参数表明，CZN除了最佳值（0.2%重量）可以有效地降低膜表面的粗糙度。当CZN含量达到最佳值（0.2wt%）时，膜的透水性和抗污染性均有所提高。当CZN含量为0.2wt%时，共混膜的纯水通量增长约32%。此外，所引用的共混膜在牛血清白蛋白（BSA）污染剂中显示出更高的通量恢复率（FRR（%））。所有纳米复合膜的BSA截留率均在95%以上。
Novel polyethersulfone (PES) ultrafiltration membranes blended with different contents of the CuO/ZnO (CZN) nanocomposite were prepared by the non-solvent induced phase inversion method. High hydrophilicity of ZnO nanoparticle made it an excellent choice to be incorporated with CuO nanoparticles in order to improve the membrane properties as a nanofiller additive. Scanning electron microscopy (SEM), atomic force microscopy (AFM), mean pore size measurement, water contact angle, and energy dispersive X-ray (EDX) were used for membrane characterization. Cross-sectional SEM images showed that by the addition of the CZN up to 0.2 wt%, the morphology of the membrane had little tendency to alter from a finger-like structure to a macro-void one. However, by further increasing the CZN, the porosity was reduced. The homogenous distribution and no agglomeration of CZN, which could be seen in the surface SEM images, were the result of the proper dependency between CZN and the polymer matrix. EDX analysis presented the homogenous dispersion of the nanoparticles in the PES matrix. AFM images also showed that the surface roughness was not changed significantly by the CZN concentration. However, the calculated roughness parameters showed that CZN addition up to the optimum value (0.2 wt%) could be effective in decreasing the roughness of the membrane surface. The mixed matrix membrane up to the optimum value of CZN (0.2 wt%) presented the improved properties in water permeability and fouling resistance. When the content of CZN was 0.2 wt%, the pure water flux growth of the blended membrane was about 32%. In addition, the cited blended membrane displayed a higher flux recovery ratio (FRR (%)) in the bovine serum albumin (BSA) fouling agent. BSA rejection was above 95% for all of the nano composite membranes.