Enhancing chlorine resistances and anti-biofouling properties of commercial aromatic polyamide reverse osmosis membranes by grafting 3-allyl-5,5-dimethylhydantoin and N,N′-Methylenebis(acrylamide)

► MBA and ADMH were used to modify a commercial aromatic polyamide RO membrane. ► MBA linked two ADMH groups and reduced the self-inhibition of allyl unit on ADMH. ► Membrane chlorine resistance and anti-biofouling properties were obviously enhanced. ► The repeatability of membrane chlorine resistance and anti-biofouling was confirmed.