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Preparation and properties of MOF-808(NH2) modified
polyamide nanofiltration membranes
Authors： WANG Ziwei1, SHEN Yue1, WANG Tao1,2, FENG Yingnan1, ZHAO Zhiping1
Units： 1. School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China; 2. Tangshan Research Institute of Beijing Institute of Technology, Tangshan 063000, China
KeyWords： MOF-808(NH2); green synthesis; interfacial polymerization; nanocomposite nanofiltration membrane; high permeability
ClassificationCode：TQ028.8
year,volume(issue):pagination： 2025,45(3):9-22

Abstract：
Metal-organic framework materials (MOFs) have shown remarkable advantages in the field of functional modification of nanofiltration membranes because of their regular pore structure, polymer compatibility and high specific surface area, but their application is still limited by key challenges such as nano-dispersion stability and green preparation. In this study, MOF808 with excellent water stability was selected as a modified nano-material. MOF808 particles with a particle size of about 60 nm and a specific surface area of 1 702 m2/g were prepared by a two-step green synthesis process, and MOF808(NH2) was obtained by amino modification. Based on pre-deposition assisted interfacial polymerization, MOF808(NH2) modified polyamide nanocomposites were successfully constructed. The results showed that the increase of MOF808(NH2) loading promoted the change of membrane surface morphology from nodular structure to particle aggregation state, and the roughness and hydrophilicity were improved. The optimized NF2 membrane [MOF808(NH2) loading of 3.18 μg/cm2] showed excellent permeation selectivity, with a water flux of 177.15 L/(m2·h·MPa), and the rejection rates of Na2SO4 and NaCl reached 95.06% and 19.24% respectively. NF2 membrane showed excellent long-term stability in 100 hours of continuous operation test. The directional modification strategy of functionalized MOFs developed in this study provides a new regulatory path for the rational design and preparation of high-performance TFN membrane. 
 

Funds：
国家自然科学基金面上项目(52370063)； 河北省自然科学基金面上项目（B2022105012）

AuthorIntro：
王紫薇（1999-），女，河北保定人，硕士研究生，从事纳滤膜制备及应用研究

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