High-performance multifunctional filtration membranes are highly required in treating practically complex oily wastewater systems,but still a challenge unsolved.Herein,we propose a facile route to address these challe...High-performance multifunctional filtration membranes are highly required in treating practically complex oily wastewater systems,but still a challenge unsolved.Herein,we propose a facile route to address these challenges simultaneously by simply constructing electrospun pre-oxidized polyacrylonitrile nanofibrous membrane(p-PAN NM).Given the pre-oxidation process,the p-PAN NM displays not only robust anti-corrosive tolerance against diverse corrosive media,but also superhydrophilicity/underwater superoleophobicity.Additionally,~99%separation efficiency,~100%oil-fouling recovery,and ultralong service life(up to 265 h)have been realized in separating large-scale surfactant stabilized soybean/crude oil-in-water emulsions.Furthermore,strong anti-corrosive performance against various corrosive media(e.g.,1 M HCl,1 M NaOH,or 10 wt%NaCl)has been achieved as well.Spin-unrestricted density functional theory(DFT)computations implemented in the Dmol3 modulus has been conducted to understand the robust fouling recovery and the variation of surficial wettability after pre-oxidation.These outstanding filtration functions make our NM hold great potential in separating viscous oil/water emulsions under harsh conditions.展开更多
基金supported by the National Natural Science Foundation of China(No.52073238 and 52173301)Open Funds of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(PLN202205,SWPU)Natural Science Foundation of Sichuan Province(2022NSFSC0356).
文摘High-performance multifunctional filtration membranes are highly required in treating practically complex oily wastewater systems,but still a challenge unsolved.Herein,we propose a facile route to address these challenges simultaneously by simply constructing electrospun pre-oxidized polyacrylonitrile nanofibrous membrane(p-PAN NM).Given the pre-oxidation process,the p-PAN NM displays not only robust anti-corrosive tolerance against diverse corrosive media,but also superhydrophilicity/underwater superoleophobicity.Additionally,~99%separation efficiency,~100%oil-fouling recovery,and ultralong service life(up to 265 h)have been realized in separating large-scale surfactant stabilized soybean/crude oil-in-water emulsions.Furthermore,strong anti-corrosive performance against various corrosive media(e.g.,1 M HCl,1 M NaOH,or 10 wt%NaCl)has been achieved as well.Spin-unrestricted density functional theory(DFT)computations implemented in the Dmol3 modulus has been conducted to understand the robust fouling recovery and the variation of surficial wettability after pre-oxidation.These outstanding filtration functions make our NM hold great potential in separating viscous oil/water emulsions under harsh conditions.
