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首页> 外文期刊>Applied Surface Science >Water-soluble MOF nanoparticles modified polyethersulfone membrane for improving flux and molecular retention
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Water-soluble MOF nanoparticles modified polyethersulfone membrane for improving flux and molecular retention

机译：水溶性MOF纳米颗粒改性聚醚砜膜，可改善通量和分子保留

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摘要

The design and preparation of polymeric membranes with excellent permeability while maintaining the high rejection remains a great challenge. In this study, water-soluble metal-organic framework nanoparticles are fabricated and used as additive for modification of polyethersulfone membrane to form a uniform porous membrane by liquid-liquid phase conversion technology. The water-soluble metal-organic framework nanoparticles can be removed by water dissolution, which is beneficial to form a thin and porous separation layer on the modified membrane. And we can control the amount and size of pores in the modified membrane by changing the concentration and size of the metal-organic framework nanoparticles. Therefore, permeability of the modified membrane is significantly improved. When the mass fraction of metal-organic framework nano-particle is 3%, the water flux of the modified membrane is up to 121.5 L m(-2) h(-1), and has a high rejection close to 100% for bovine serum albumin. The rejection rates of modified membranes for methyl blue and congo red are 82.3 and 98.6%, respectively. Our work provides a simple method to fabricate an advanced modified membrane with outstanding separation performance.
机译：在保持高排阻的同时，具有优异渗透性的聚合物膜的设计和制备仍然是巨大的挑战。在这项研究中，水溶性金属-有机骨架纳米粒子被制备并用作添加剂，通过液-液相转化技术改性聚醚砜膜，形成均匀的多孔膜。水溶性金属-有机骨架纳米颗粒可通过水溶解除去，这有利于在改性膜上形成薄且多孔的分离层。通过改变金属有机骨架纳米颗粒的浓度和大小，我们可以控制改性膜中孔的数量和大小。因此，改性膜的渗透性显着提高。当金属-有机骨架纳米粒子的质量分数为3％时，改性膜的水通量高达121.5 L m（-2）h（-1），并且对牛的排泄率接近100％血清白蛋白。改性膜对甲基蓝和刚果红的排斥率分别为82.3和98.6％。我们的工作提供了一种简单的方法来制造具有出色分离性能的高级改性膜。

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