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Yongdi Ma,Xi Chen,Shuai Wang,Hualin Dong,Xiaoying Zhai,Xin Shi,Jianzu Wang,Rujiang Ma,Wangqing Zhang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
PVDF membrane has strong hydrophobicity and low anti-pollution performance, greatly limiting its practicalapplication. These drawbacks have been successfully overcome by designing and then preparing amembrane with a semi-interpenetrating polymer (semi-IPN) of PVDF/poly(acrylic acid) (PAA) as themembrane matrix, TiO2 nanoparticles as functional components and F127 as pore-forming agent. Thesemi-IPN was prepared by copolymerizing acrylic acid with N,N methyl acrylamide in the presence ofPVDF, and the TiO2 gel nanoparticles were in situ formed in the membrane-forming process. The propertiesof the composite membrane were significantly affected by the semi-IPN, F127 and TiO2. By adjustingthe membrane structure with the semi-IPN, F127 and TiO2 nanoparticles, we prepared a composite membranewith a water contact angle of 40, a BSA rejection ratio of 87.5% and a water flux of 802.5 L/m2/h/bar. After a simple UV irradiation, the water flux of this composite membrane rose to 1030 L/m2/h/bar,without any rejection decline. The membrane contaminated by humic acid could recover the water fluxup to above 95.3% of its original value by a single UV irradiation, showing a very good antifouling performance. In addition, the composite membrane also exhibited a very strong pollution resistance and separationperformance for bovine serum albumin and oil-water emulsion. All in all, based on the synergy ofthe semi-IPN and the evenly dispersed TiO2 nanoparticles, the prepared composite membrane exhibitedexcellent comprehensive properties and demonstrated a great potential for various separationapplications.