In this study, a cardo poly(aryl ether ketone) ultrafiltration membrane containing an N-chloramine functional group (PER-N-C1 membrane) was easily obtained via exposure of a cardo poly(aryl ether ketone) ultrafiltration membrane (PER-NH membrane) to dilute sodium hypochlorite solution. The chlorination process did not harm membrane performance. In addition, the PER-N-C1 membrane was stable in both air and water. The PER-N-CI membrane exhibited excellent antimicrobial properties against both Gram-negative and Gram-positive bacteria (i.e. E. coli and Bacillus subtilis, respectively). The PEK-N-Cl membrane provided 94.2% and 100% reduction of E. coli and Bacillus subtilis, respectively, within 30 min of contact times. Moreover, nearly 100% of the E. coli was killed after 2 h during the filtration process for the PEK-N-Cl membrane. In addition, the water flux decreased by 42% for the PEK-N-Cl membrane compared to 77.6% for the PER -NH membrane after filtration of the E. coli solution and incubation on LB nutrient agar plate, indicating that the PEK-N-C1 membrane enhibits antifouling. Furthermore, the PEK-N-C1 membrane is recyclable via subsequent exposure to a sodium hypochlorite solution.(C) 2017 Elsevier Inc. All rights reserved.