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Mingzhu Chi,Pingyun Zheng,Mingxin Wei,Aimei Zhu,Lubin Zhong,Qiugen Zhang,Qinglin Liu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-
The traditional polyamide composite nanofiltration membrane has high selectivity. However, low waterpermeability is an important problem to be solved. Herein, the conventional polyamide compositenanofiltration (TFC) membrane was modified with nanoporous TiO2 (nTiO2) interlayer throughvacuum-assisted strategy for enhanced water permeability. By tuning the nTiO2 nanoparticles loading,the nTiO2 modified TFC membrane with crumpled structure was fabricated. Besides, the thickness ofpolyamide layer was reduced due to the hydrophilicity and porosity of nTiO2. Because of the larger effectivefiltration area and thinner polyamide layer, the modified membrane had a permeability of12.8 L m2 h1 bar1 (increased by 20.8% than that of TFC membrane) and a rejection of 98.2% when filteringNa2SO4 aqueous solution. This work provided a solution for enhanced water permeability andextended the application of TiO2 in the modification of polyamide composite nanofiltration membrane.