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Effect of alumina nanoparticles on the antifouling properties of polycarbonate-polyurethane blend ultrafiltration membrane for water treatment
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-08-03 , DOI: 10.1002/pen.25764 Habib Etemadi 1 , Soheyla Afsharkia 1 , Sahar Zinatloo‐Ajabshir 2 , Elham Shokri 2
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2021-08-03 , DOI: 10.1002/pen.25764 Habib Etemadi 1 , Soheyla Afsharkia 1 , Sahar Zinatloo‐Ajabshir 2 , Elham Shokri 2
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In this work, the flexibility of polycarbonate (PC) membrane was improved by using polyurethane (PU) additive. However, due to the hydrophobic nature of the PU polymer, alumina (Al2O3) nanoparticles were incorporated to PC-PU blend membrane. The prepared membranes have been used in a submerged membrane system to eliminate humic acid molecules from polluted water in both the presence and absence of coagulant (polyaluminum chloride). The obtained results showed that introduction of PU into PC membrane diminished hydrophilicity and enhanced porosity. Moreover, the flexibility of the PC membrane remarkably improved. Introduction of 1.5 wt% Al2O3 to the PC-PU blend membrane led to enhancement in both porosity and hydrophilicity. Results of morphological studies showed that in the presence of Al2O3 nanostructures, finger-shaped voids seemed to elongate across the entire thickness of the prepared membrane. Atomic force microscopy images showed that incorporation of PU and Al2O3 to the PC membrane resulted in a smoother surface. The antifouling performance of membranes revealed that the PC-PU/Al2O3 nanocomposite membrane possessed the most favorable antifouling features owing to its lowest surface roughness as well as highest hydrophilicity. For all membranes utilizing coagulant (PAC), the irreversible fouling ratio and the flux recovery ratio significantly diminished and increased, respectively.
中文翻译：
纳米氧化铝对聚碳酸酯-聚氨酯共混超滤膜水处理防污性能的影响
在这项工作中，通过使用聚氨酯 (PU) 添加剂提高了聚碳酸酯 (PC) 膜的柔韧性。然而，由于 PU 聚合物的疏水性，氧化铝 (Al 2 O 3 ) 纳米颗粒被加入到 PC-PU 共混膜中。所制备的膜已用于浸没式膜系统，以在混凝剂（聚合氯化铝）存在和不存在的情况下从污水中去除腐殖酸分子。所得结果表明，将 PU 引入 PC 膜会降低亲水性并增加孔隙率。此外，PC膜的柔韧性显着提高。引入 1.5 wt% Al 2 O 3PC-PU 共混膜导致孔隙率和亲水性的增强。形态学研究结果表明，在Al 2 O 3纳米结构的存在下，指状空隙似乎在制备的膜的整个厚度上拉长。原子力显微镜图像显示，将 PU 和 Al 2 O 3掺入PC 膜会导致表面更光滑。膜的防污性能表明，PC-PU/Al 2 O 3由于其最低的表面粗糙度和最高的亲水性，纳米复合膜具有最有利的防污特性。对于所有使用混凝剂 (PAC) 的膜，不可逆污染率和通量回收率分别显着减少和增加。
更新日期：2021-09-06
中文翻译：
纳米氧化铝对聚碳酸酯-聚氨酯共混超滤膜水处理防污性能的影响
在这项工作中，通过使用聚氨酯 (PU) 添加剂提高了聚碳酸酯 (PC) 膜的柔韧性。然而，由于 PU 聚合物的疏水性，氧化铝 (Al 2 O 3 ) 纳米颗粒被加入到 PC-PU 共混膜中。所制备的膜已用于浸没式膜系统，以在混凝剂（聚合氯化铝）存在和不存在的情况下从污水中去除腐殖酸分子。所得结果表明，将 PU 引入 PC 膜会降低亲水性并增加孔隙率。此外，PC膜的柔韧性显着提高。引入 1.5 wt% Al 2 O 3PC-PU 共混膜导致孔隙率和亲水性的增强。形态学研究结果表明，在Al 2 O 3纳米结构的存在下，指状空隙似乎在制备的膜的整个厚度上拉长。原子力显微镜图像显示，将 PU 和 Al 2 O 3掺入PC 膜会导致表面更光滑。膜的防污性能表明，PC-PU/Al 2 O 3由于其最低的表面粗糙度和最高的亲水性，纳米复合膜具有最有利的防污特性。对于所有使用混凝剂 (PAC) 的膜，不可逆污染率和通量回收率分别显着减少和增加。
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