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首页> 外文期刊>Journal of Applied Polymer Science >NanoSiO(2)andTiO(2)embedded polyacrylonitrile/polyvinylidene fluoride ultrafiltration membranes: Improvement in flux and antifouling properties
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NanoSiO(2)andTiO(2)embedded polyacrylonitrile/polyvinylidene fluoride ultrafiltration membranes: Improvement in flux and antifouling properties

机译：纳米磷（2）烯烃（2）包埋聚丙烯腈/聚偏二氟醚超滤膜：通量和防污性能的改善

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摘要

Polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN) ultrafiltration (UF) membranes are widely used in drinking water and wastewater applications. These membranes are prone to fouling and membrane efficiency decreases with time under constant operation. Significant improvements/modifications are necessary to apply these polymers as sustainable membrane materials. In this study, PVDF and PAN UF membranes were modified through incorporation of nanoparticles (NPs) namely SiO(2)and TiO2. PVDF and PAN UF membranes were prepared by phase inversion method from polymer solutions having dispersed SiO(2)and TiO(2)NPs in it. Membrane surface hydrophilicity, charge, roughness, and morphology were studied. Equilibrium water content and molecular weight cut-off of the membranes were also measured. Addition of NPs increased membrane surface hydrophilicity, equilibrium water content, and surface potential. NPs modified membranes exhibited better membrane flux (35-79% higher) and antifouling properties (flux recovery ratio values 28-41% higher) than the virgin membranes.
机译：聚偏氟乙烯（PVDF）和聚丙烯腈（PAN）超滤膜广泛应用于饮用水和废水处理。在恒定操作条件下，这些膜容易受到污染，膜效率随时间降低。要将这些聚合物用作可持续的膜材料，需要进行重大改进/修改。在本研究中，通过加入纳米颗粒（即SiO（2）和TiO2）对PVDF和PAN超滤膜进行了改性。采用相转化法制备了聚偏氟乙烯（PVDF）和聚丙烯腈（PAN）超滤膜。研究了膜表面亲水性、电荷、粗糙度和形貌。还测量了膜的平衡含水量和分子量截止值。NPs的加入增加了膜的表面亲水性、平衡水含量和表面电位。与未经处理的膜相比，经NPs修饰的膜具有更好的膜通量（高35-79%）和防污性能（通量恢复率值高28-41%）。

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