In situ engineering of an ultrathin polyamphoteric layer on polyketone-based thin film composite forward osmosis membrane for comprehensive anti-fouling performance

Thin film composite (TFC) membranes easily suffer from fouling induced by oil and other pollutants during forward osmosis (FO) due to the relatively hydrophobic chemistry rough structure of polyamide (PA). To achieve comprehensive anti-fouling properties, poly(2-methacryloyloxyethyl phosphorylcholine-co-2-aminoethyl methacrylate hydrochloride) (MPC-co-AEMA) was immobilized on top a polyketone (PK)-based TFC membrane following single-step simultaneous deposition with dopamine. The adhesive properties polydopamine (PDA), as well covalent interactions between PDA MPC-co-AEMA, ensured firm immobilization MPC-co-AEMA PA layer. As result high-performance superhydrophilic underwater superoleophobic engineered. In addition, outstanding water adsorption capacity polyamphoteric layer resulted in better protein adhesion mitigation. FO operation using various foulants also demonstrated high resistance PK-TFC-PDA/MPC membrane, especially treatment wastewater emulsion containing concentration bovine serum albumin (BSA). summary, findings this study could provide insights into preparation for purification FO.