Single wall carbon nanotubes(SWNT), multiwall carbon nanotubes(MWNT) and dodecyltrichlorosilane modified MWNT were incorporated into polydimethylsiloxane(PDMS) for separation of ethanol/water mixture via pervaporation. The pervaporation results showed that separation performance of MWNT/PDMS hybrid membrane was better than that of SWNT/PDMS hybrid membrane. When MWNT/PDMS hybrid membranes were used to separate 5%(mass) ethanol aqueous solution at 40℃, a separation factor of 10.0 and total flux of 206.2 g·(m...