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Improving membrane durability associated with fouling and chlorine resistance remains one of the major challenges in desalination membrane technology.Here,we demonstrate that attractive features of graphene oxide (GO) nanosheets such as high hydrophilicity,chemical robustness,and ultrafast water permeation can be harnessed for a dual-action barrier coating layer that enhances resistance to both fouling and chlorine-induced degradation of polyamide (PA) thin-film composite (TFC) membranes while preserving their separation performance.GO multilayers were coated on the PA-TFC membrane surfaces via layer-by-layer (LbL) deposition of oppositely charged GO nanosheets.