第3期高继发等:溶胀法改性聚二甲基硅氧烷及在多层复合膜中的应用·53·separation,havebeenwidelyusedinrecentyears.PDMScaneffectivelypreventporepenetrationwhenitisusedasthegutterlayerofcompositemembranes.However,thehydrophobicityofPDMSisnotconducivetothecoatingoftheselectivelayersolution.Therefore,PDMSisurgentlyneededtobemodified.Inthispaper,fournonionicsurfactants-PluronicⓇF68,PluronicⓇF127,Tween20,andTween60wereusedtoimprovethehydrophilicityandgasseparationperformanceofPDMSbyswelling.Astheresultsshow,thePAN/PDMScompositionmembranemodifiedbyPluronicⓇF127showedthebestperformanceamongthefournonionicsurfactants.Afterswellingtreatment,PAN/PDMS-PluronicⓇF127compositionmembranehadchangedthesurfacecompositionanditshydrophilicitywasenhanced.ComparedwithPAN/PDMS,thegaspermeationperformanceofPAN/PDMS-PluronicⓇF127wasgreatlyimprovedwithlittlechangeonthemechanicalandthermodynamicproperties.TheN2,O2,andCO2permeanceofPAN/PDMS-PluronicⓇF127compositemembranereached419.8GPU,831.9GPU,and2879.7GPU,respectively,andcomparedwithPAN/PDMS,the...