期刊
JOURNAL OF MEMBRANE SCIENCE
卷 619, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2020.118789
关键词
Polyketone; Polydopamine; Polyampholyte; Anti-oil-fouling; Oil/water separation
资金
- China Scholarship Council [201708120049]
By forming a new polyampholyte layer on a porous polyketone membrane, the anti-fouling property of the membrane in oil/water separation was improved, resulting in a superhydrophilic and underwater superoleophobic surface with high water permeance, emulsion permeance, and oil rejection.
Fouling caused by oils or other pollutants is one of the most important obstacles for membrane application in oil/water separation. To improve the anti-oil-fouling property, a new polyampholyte layer of poly (2-meth-acryloyloxyethyl phosphorylcholine-co-2-aminoethyl methacrylate hydrochloride) (MPC-co-AEMA) was in situ formed on the porous polyketone membrane via an extremely simple one-step dopamine co-deposition strategy. The MPC-co-AEMA layer was firmly immobilized on a polyketone membrane via polydopamine (PDA) adhesion and covalent crosslinking between MPC-co-AEMA and polydopamine. Thus, a robust superhydrophilic and underwater superoleophobic surface was formed on the PDA&MPC-d-PK membrane. The ultrathin polydopamine/MPC-co-AEMA layer on PDA&MPC-d-PK membrane endowed it with a high water permeance of 10,700 L m(-2) h(-1) bar(-1), as well as high emulsion permeance of 10,100 L m(-2) h(-1) bar(-1), and oil rejection of 99.9%. Owing to the unique design of the superhydrophilic polydopamine/MPC-co-AEMA layer combined with intrinsically hydrophilic polyketone membrane, high fouling-resistance and fouling-releasing properties of PDA&MPC-d-PK membrane were achieved even for the viscous surfactant-stabilized soybean oil-in-water emulsion.
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