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首页> 美国卫生研究院文献>Membranes >ZrO2-TiO2 Incorporated PVDF Dual-Layer Hollow Fiber Membrane for Oily Wastewater Treatment: Effect of Air Gap
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ZrO2-TiO2 Incorporated PVDF Dual-Layer Hollow Fiber Membrane for Oily Wastewater Treatment: Effect of Air Gap

机译：ZrO2-TiO2掺入的PVDF双层中空纤维膜用于含油废水的处理：气隙的影响

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摘要

Dual-layer hollow fiber (DLHF) nanocomposite membrane prepared by co-extrusion technique allows a uniform distribution of nanoparticles within the membrane outer layer to enhance the membrane performance. The effects of spinning parameters especially the air gap on the physico-chemical properties of ZrO -TiO nanoparticles incorporated PVDF DLHF membranes for oily wastewater treatment have been investigated in this study. The zeta potential of the nanoparticles was measured to be around –16.5 mV. FESEM–EDX verified the uniform distribution of Ti, Zr, and O elements throughout the nanoparticle sample and the TEM images showed an average nanoparticles grain size of ~12 nm. Meanwhile, the size distribution intensity was around 716 nm. A lower air gap was found to suppress the macrovoid growth which resulted in the formation of thin outer layer incorporated with nanoparticles. The improvement in the separation performance of PVDF DLHF membranes embedded with ZrO -TiO nanoparticles by about 5.7% in comparison to the neat membrane disclosed that the incorporation of ZrO -TiO nanoparticles make them potentially useful for oily wastewater treatment.
机译：通过共挤出技术制备的双层中空纤维（DLHF）纳米复合膜可以使纳米颗粒在膜外层内均匀分布，从而提高膜性能。本研究研究了纺丝参数特别是气隙对掺入PVDF DLHF膜的ZrO-TiO纳米颗粒在含油废水处理中的理化性能的影响。测得的纳米粒子的Zeta电位约为–16.5 mV。 FESEM–EDX验证了整个纳米颗粒样品中Ti，Zr和O元素的均匀分布，并且TEM图像显示纳米颗粒的平均粒径约为12 nm。同时，尺寸分布强度为716nm左右。发现较低的空气间隙抑制了大孔的生长，这导致形成了掺有纳米颗粒的薄外层。与纯膜相比，嵌入ZrO-TiO纳米颗粒的PVDF DLHF膜的分离性能提高了约5.7％，这表明掺入ZrO-TiO纳米颗粒使其潜在地可用于含油废水处理。

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