1.山东理工大学 材料科学与工程学院;2.天津工业大学 分离膜与膜过程国家重点实验室
The oil leakage and discharge of organic pollutants such as phenols have caused serious harm to water environment and human health. The development of technologies that can simultaneously separate oil-water mixtures (especially emulsified oil-water mixtures) and degrade phenols and other organic pollutants is the research focus of oil-water separation membrane or catalytic membrane in future. In this paper, the polyethersulfone (PES) membrane with sponge-like pore structure, high water flux and good compressive resistance was prepared by the phase inversion method with dual-bath coagulation. The 4A-Fe/PES membrane was prepared by co-deposition of PDA/PEI on the membrane surface and subsequent loading of iron species catalyst (4A-Fe) particles. The oil-water separation performance and phenol degradation performance of 4A-Fe/PES membrane were investigated. The results showed that 4A-Fe/PES had good hydrophilicity, oil resistance adhesion and excellent underwater superhydrophobicity. In addition, the degradation of phenol in the oil-water emulsion was realized while dynamically separating the oil-water emulsion. At pH 2, the conversion of phenol reached 98.4% after 50 min, and the separation efficiency of oil-water emulsion reached 99.8%. The separation efficiency of the membrane maintained 94.2% after repeated use for three times.