High performance polyamide crosslinked graphene oxide/MPNs nanofiltration membrane for wastewater purification
High performance polyamide crosslinked graphene oxide/MPNs nanofiltration membrane for wastewater purification
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DOI：
10.1016/j.seppur.2022.120798
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发表时间：
2022-03
影响因子：
8.6
通讯作者：
Chongbin Wang;Yongsheng Li;Hong Wang;Yiyu Wang;Xiaoyu Chen;Chengze Li;Mengfei Sun;Jianxin Chen
中科院分区：
文献类型：
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作者：
Chongbin Wang;Yongsheng Li;Hong Wang;Yiyu Wang;Xiaoyu Chen;Chengze Li;Mengfei Sun;Jianxin Chen
通过聚酰胺交联的氧化石墨烯（GO）片制备的纳滤膜已被认为有希望应用于水净化。不幸的是，聚酰胺交联的GO基膜的水通量由于GO片的小的层间间距而受到强烈限制。为了解决这个问题，微孔聚合物网络（MPN）和GO片被引入到聚酰胺层，以达到协同效应，在这项工作中。具体地，通过插入MPN纳米颗粒来操纵GO片层间相互作用。GO和MPN的协同效应显著有利于水通量的提高。通过调节MPNs纳米粒子的含量，形成了一个精致的褶皱膜表面，这可以提供更大的面积与水分子接触，进一步提高了水通量。与不含MPN的GO基膜相比，具有1 g/m2 MPN和41.8 mg/m2 GO片的膜的水通量从6.6 L m-2 h-1bar-1显著增加到25.1 L m-2 h-1bar-1。此外，还观察到所制备的膜的94%的高Na 2SO 4截留率和相当的抗污染性能的效率。
Nanofiltration membranes prepared via polyamide crosslinked Graphene oxide (GO) sheets have been considered to be promisingly applied in water purification. Unfortunately, the water flux of polyamide crosslinked GO-based membranes is strongly restricted due to the small interlamellar spacing of GO sheets. To solve this problem, the microporous polymer networks (MPNs) and GO sheets were introduced into the polyamide layer to reach a synergistic effect in this work. Specifically, the interlamellar interaction of GO sheets was manipulated via intercalating MPNs nanoparticles. The synergistic effect of GO and MPNs was significantly beneficial for the improvement of water flux. A delicate wrinkled membrane surface was formed via regulating the content of MPNs nanoparticles, which could provide larger area in contact with water molecules, further improved the water flux. The prepared membrane with 1 g/m2MPNs and 41.8 mg/m2GO sheets gave an evidently increased water flux from 6.6 L m−2h−1bar−1to 25.1 L m−2h−1bar−1compared with the GO-based membrane without MPNs. Additionally, a high Na2SO4retention of 94% and considerable efficiency in anti-fouling property were also observed for the prepared membranes.