Superwetting polymer-decorated SWCNT composite ultrathin films for ultrafast separation of oil-in-water nanoemulsions

摘要: Functional membranes with a superwetting surface property have been extensively explored to achieve oil–water separation. Here, single-walled carbon nanotube/polydopamine/polyethyleneimine (SWCNT/PD/PEI) composite ultrathin films which superhydrophilic and underwater superoleophobic properties were successfully prepared used for the ultrafast separation of surfactant-stabilized oil-in-water nanoemulsions containing oil droplets tens nanometers. A SWCNT/PD/PEI film an effective pore size ∼10 nm thickness ∼160 can effectively separate in manner fluxes up ∼6000 L m−2 h−1 bar−1, is 10-fold higher than traditional ultrafiltration similar rejection property. Meanwhile, this exhibits excellent pH-stability antifouling This work points direction designing fabricating or nano-sized oils are hard by methods. The holds promising potential purifying emulsified wastewater from industries daily life drinking water treatment.