期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 60, 期 23, 页码 8516-8526出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c00685
关键词
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资金
- National Natural Science Foundation of China [21776080, 21776091]
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-02-E00061]
The research described the fabrication of superhydrophobic polybenzoxazine (PBZ)/TiO2 coatings with reversible wettability for oil/water separation applications. These coatings can switch between superhydrophobicity and superphilicity through UV irradiation and heating treatment cycles, offering high separation efficiency and durability.
Superhydrophobic polybenzoxazine (PBZ)/TiO2 coatings with reversible wettability were fabricated by blending eugenol/siloxane-based benzoxazine (E-aptmds) with TiO2 nanoparticles through spin coating and thermal curing processes. The resulting coatings could switch between superhydrophobicity and superhydrophilicity through alternate ultraviolet (UV) irradiation and heating treatment cycles. The PBZ/TiO2 coating-modified stainless steel mesh (PBZ/TiO2 mesh) had ultra-high oil/water separation fluxes of over 54,000 L/m(2) h only by gravity for several heavy oil/water mixtures. Meanwhile, the PBZ/TiO2 mesh could efficiently collect various light oils from water with separation efficiencies of over 96.0%. Additionally, the PBZ/TiO2 mesh could purify methylene blue-contaminated water through UV irradiation. Owing to the self-cleaning property of the PBZ/TiO2 mesh, chemical and powdery pollutants could be easily dispelled. Furthermore, the as-prepared mesh exhibited strong durability under harsh treatments including high temperature, acid/alkali immersion, or organic solvent immersion. Hence, the PBZ/TiO2 mesh owns a bright prospect in the application of oil/water separation.
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