High-flux polyamide thin film nanofiltration membrane incorporated with metal-induced ordered microporous polymers

Zhao, Song; Mao, Chenyue; Wang, Ting; Qiao, Zhihua; Wang, Zhi; Wang, Jixiao

doi:10.1016/j.seppur.2020.117817

Cited by 23 publications

(1 citation statement)

References 39 publications

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“…In recent years, researchers have got many progresses in regulating the surface structure of PA membranes to improve their permeation selectivity. – For example, Niu et al fabricated PA membranes with complex structures and high specific surface area via the water template method and obtained the regulation of the PA surface morphology from leaf-like to ridge-like, in which the water permeance of the PA membrane with ridged nanostructures is 21.30 L m –2 h –1 bar –1 . Gao et al fabricated PA membranes with stripe wrinkle structure and bump wrinkle structure by adjusting the amount of poly(vinyl alcohol) during the interfacial polymerization process, where the water permeance can reach 26.10 and 12.50 L m –2 h –1 bar –1 , respectively .…”

Section: Introductionmentioning

confidence: 99%

Quantitatively Unveiling the Structure–Activity Relationship of Polyamide Nanofiltration Membranes with Complex Structures

Chu,

Hao,

Shi

et al. 2023

Langmuir

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Nanofiltration polyamide (NF PA) membranes are widely used in seawater desalination and wastewater treatment due to their excellent permeability. The structure–activity relationship of PA membranes has attracted extensive attention in decades. In this work, NF PA membranes with planar structure, nodular structure, and peak–valley structure were constructed, and the pure water permeance was calculated by nonequilibrium molecular dynamics simulation to quantitatively investigate the structure–activity relationship between the microstructure and water permeance. Results showed that the peak–valley structure had the highest effective utilization rate of the membrane surface, which had the highest number of water molecules that passed through membranes per unit cross-sectional area (7.09). Furthermore, with the increase of the specific surface area ratio, the water permeance of the NF PA with peak–valley increased at a rate about 2.5 times than that of the planar NF PA. Therefore, some molecular scale insights were supplied about the structure–activity relationship of NF PA membranes, which is helpful for the fabrication of high-performance NF PA membranes.

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