This　work　is　concerned　with　the　preparation　of　alcohol　permselective　inner　skin　hollow　fiber　composite　membrane　using　a　dynamic　cross-flow　coating　method.　The　membranes　were　successfully　prepared　by　dynamically　coating　polydimethylsiloxane　(PDMS)　on　the　inner　surface　of　the　polysulfone　(PS)　hollow　fibers　under　a　pressure-driven　process.　The　strategy　of　alternating　PDMS　casting　solution　direction　was　firstly　explored　to　ensure　the　formation　of　a　uniform　and　defect-free　selective　layer.　Subsequently,　the　effects　of　coating　time,　polymer　concentration,　and　crosslink　agent　concentration　on　alcohol　permselective　performance　were　investigated.　The　appropriate　conditions　were:　coating　time,　60　min;　PDMS　concentration,　22.8　wt.%;　and　TEOS　concentration,　1.5　wt.%.　Under　the　given　conditions,　in　the　case　of　pervaporation　separation　of　8　wt.%　ethanol　water　mixture　(50　C),　the　membrane　had　a　separation　factor　of　6.4　and　a　permeate　flux　of　265　g/(m(2)　h),　respectively.　The　pervaporation　separation　behavior　of　various　alcohol/water　mixtures　with　the　alcohols　being　t-butanol,　2-propanol　was　also　investigated.　SEM,　AFM　and　contact　angle　analyses　confirmed　the　formation　of　selective　layer　on　the　inner　surface　of　hollow　fibers.　Therefore,　it　indicates　that　the　dynamic　cross-now　coating　technique　is　a　unique　approach　to　the　construction　of　selective　layer　on　porous　hollow　fiber　substrates,　which　could　emerge　as　a　powerful　technique　for　the　preparation　of　a　range　of　separation　membranes.　(C)　2010　Elsevier　B.V.　All　rights　reserved.