Self-assembly　of　polyelectrolyte　multilayer　membranes　(PEMMs)　by　using　dynamic　layer-by-layer　(LBL)　adsorption　technique　was　conducted　in　this　study.　The　polyethyleneimine　(PEI)　and　polyacrylic　acid　(PAA)　were　alternatively　deposited　on　the　hydrolyzed　polyacrylonitrile　(PAN)　ultrafiltration　membranes　under　a　pressure　of　0.1　MPa.　The　changes　of　membrane　surfaces　were　observed　by　using　atomic:　force　microscopy.　It　was　found　that　the　regularity　of　the　PEMMs　was　enhanced　after　the　dynamic　LBL　assembly.　The　pervaporation　separation　behavior　of　various　alcohol/water　mixtures　with　the　alcohols　being　t-butanol,　2-propanol　and　ethanol　are　compared　with　a　relatively　wide　range　of　feed　temperature　and　concentration.