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Preparation and hydrophobicity modification of poly(vinylidene fluoride-co-hexafluoropropylene) membranes for pervaporation separation of volatile organic compound from water
Polymer Composites ( IF 4.8 ) Pub Date : 2021-06-24 , DOI: 10.1002/pc.26178 Haniyeh Sadat Miranmousavi 1 , Ehsan Saljoughi 1 , Seyed Mahmoud Mousavi 1 , Shirin Kiani 1
Polymer Composites ( IF 4.8 ) Pub Date : 2021-06-24 , DOI: 10.1002/pc.26178 Haniyeh Sadat Miranmousavi 1 , Ehsan Saljoughi 1 , Seyed Mahmoud Mousavi 1 , Shirin Kiani 1
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In this study, novel nanocomposite membranes were fabricated for the removal of isopropyl benzene, a volatile organic compound (VOC), from water via pervaporation (PV). The membranes were made of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) copolymer. In order to improve the hydrophobic properties of the membranes, hydrophobic silica nanoparticles that had been surface modified by hexamethyldisilazane were used as the nanofiller in the PV membranes, for the first time. Incorporating hydrophobic silica nanoparticles into PVDF-HFP and increasing its concentration up to 9 wt% enhanced membrane hydrophobicity. Evaluation of membrane performance in VOC separation from water showed that the membrane containing 9 wt% of silica had the highest VOC separation factor, so that the values of total flux, separation factor, and PV separation index (PSI) were 3.77 g/m2/h; 42,483.81; and 158,788.50 g/m2/h for this membrane, respectively. The separation factor and PSI value of the mentioned membrane were almost 204 and 5 times higher than that of the neat PVDF-HFP membrane.
中文翻译：
用于渗透蒸发分离水中挥发性有机化合物的聚偏二氟乙烯-共六氟丙烯膜的制备和疏水性改性
在这项研究中，制造了新型纳米复合膜，用于通过渗透蒸发 (PV) 从水中去除异丙苯，一种挥发性有机化合物 (VOC)。膜由聚（偏二氟乙烯-co-六氟丙烯）（PVDF-HFP）共聚物。为了提高膜的疏水性能，经六甲基二硅氮烷表面改性的疏水二氧化硅纳米粒子首次被用作光伏膜中的纳米填料。将疏水性二氧化硅纳米粒子掺入 PVDF-HFP 并将其浓度增加至 9 wt%，增强了膜的疏水性。从水中分离 VOC 的膜性能评估表明，含有 9 wt% 二氧化硅的膜具有最高的 VOC 分离因子，因此总通量、分离因子和 PV 分离指数 (PSI) 的值为 3.77 g/m 2 /H; 42,483.81；和 158,788.50 g/m 2/h 分别用于该膜。上述膜的分离因子和 PSI 值几乎是纯 PVDF-HFP 膜的 204 和 5 倍。
更新日期：2021-06-24
中文翻译：
用于渗透蒸发分离水中挥发性有机化合物的聚偏二氟乙烯-共六氟丙烯膜的制备和疏水性改性
在这项研究中，制造了新型纳米复合膜，用于通过渗透蒸发 (PV) 从水中去除异丙苯，一种挥发性有机化合物 (VOC)。膜由聚（偏二氟乙烯-co-六氟丙烯）（PVDF-HFP）共聚物。为了提高膜的疏水性能，经六甲基二硅氮烷表面改性的疏水二氧化硅纳米粒子首次被用作光伏膜中的纳米填料。将疏水性二氧化硅纳米粒子掺入 PVDF-HFP 并将其浓度增加至 9 wt%，增强了膜的疏水性。从水中分离 VOC 的膜性能评估表明，含有 9 wt% 二氧化硅的膜具有最高的 VOC 分离因子，因此总通量、分离因子和 PV 分离指数 (PSI) 的值为 3.77 g/m 2 /H; 42,483.81；和 158,788.50 g/m 2/h 分别用于该膜。上述膜的分离因子和 PSI 值几乎是纯 PVDF-HFP 膜的 204 和 5 倍。
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