The　stability　of　the　membrane　for　pervaporation　separation　of　aromatic/aliphatic　mixtures　is　critical　for　industrial　applications.　To　improve　the　stability　of　the　membrane,　a　＂pore-filling＂　membrane　was　prepared　by　dynamic　pressure-driven　assembly　of　a　poly(vinyl　alcohol)-graphene　oxide　(OVA-GO)　nanohybricl　layer　onto　an　asymmetric　polyaci:ylonitrile　ultrafiltration　membrane.　The　results　of　the　swelling　experiment　suggest　that　the　pore-filling　structure　could　effectively　reduce　swelling　of　the　nanohybricl　membrane.　Assembly　of　the　nanohybricl　membrane　by　molecular-level　dispersion　of　GO　in　OVA　led　to　enhanced　affinity　of　the　membrane　to　aromatic　compounds　and　thus　improved　performance　in　the　pervaporation　of　toluene/ii-heptane　mixtures.　Moreover,　the　dynamic　assembly　process　could　easily　be　used　to　adjust　the　separation　performance　by　controlling　the　pressure,　filtration　time,　polymer,　and　GO　concentration.　(C)　2014　Elsevier　B.V.　All　rights　reserved.