期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 42, 页码 24569-24582出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta07988b
关键词
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资金
- Special Coordination Funds for Promoting Science and Technology from the Ministry of Education, Culture, Sports, Science and Technology, Japan
- Creation of Innovation Centers for Advanced Interdisciplinary Research Areas Program (Innovative Bioproduction, Kobe) from the Ministry of Education, Culture, Sports, Science and Technology, Japan
- China Scholarship Council [201708120049]
Membrane fouling caused by oil or other pollutants is one of the major challenges for membrane separation technology used for emulsified oil/water purification. Aiming at the realization of comprehensive fouling-resistant/fouling-release properties, and the further achievement of long-term cyclic separation, an ultrathin silica (SiO2) layer is conformally engineered onto a porous polyketone (PK) substrate via the electrostatic attraction force silicification process. This in situ silicification forms an ultrathin and superhydrophilic/underwater superoleophobic interface structure that allows the realization of ultrahigh water permeance up to 7533 L m(-1) h(-1) bar(-1), an exceptionally high emulsion flux up to 6000 L m(-1) h(-1) bar(-1) (close to pure water permeance), and a high rejection of >99.9% against various oily emulsions. The unique design of the superhydrophilic silicification layer grown on the hydrophilic PK substrate also endowed the membrane with comprehensive antifouling properties against a broad range of oily emulsions containing various pollutants such as proteins, surfactants, and other natural organic materials (NOM), from which a nearly 100% recovery ratio of permeation flux could be obtained after several cycles of oily emulsion filtration. The use of an inorganic SiO2 modified layer incorporated into a highly chemically inert PK substrate (SiO2-d-PK membrane) also enabled the application of the SiO2-d-PK membrane under more challenging conditions, where its great tolerance and long-term stability toward salty and strongly acidic/alkaline solutions and various organic solvents were further demonstrated. Overall, this study provides an insight into engineering an ultrathin membrane with ultralow fouling-propensity for treating challenging oily emulsions.
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