資源描述：
《a.聚酰亞胺中空纖維氣體分離膜的物理老化現象》由會員上傳分享，免費在線閱讀，更多相關內容在學術論文-天天文庫。
1、第24卷第3期高?；瘜W工程學報No.3Vol.242010年6月JournalofChemicalEngineeringofChineseUniversitiesJune2010文章編號：1003-9015(2010)03-0382-06聚酰亞胺中空纖維氣體分離膜的物理老化現象1,22222212丁曉莉,曹義鳴,趙紅永,介興明,王麗娜,劉丹丹,張玉忠,袁權(1.天津工業(yè)大學材料科學與工程學院中空纖維膜材料與膜過程省部共建國家重點實驗室培育基地,天津300160;2.中國科學院大連化學物理研究所大連潔凈能源國家實驗室,遼寧大連116023)?摘要：以聚酰亞胺6F
2、DA-mPDA為原料制備了單層非對稱中空纖維膜，以聚酰亞胺Matrimid5218為分離層材料制備了雙層非對稱中空纖維膜，膜的致密層厚度為0.09~0.21μm。測試了中空纖維膜的O2、N2、CH4和CO2等氣體滲透性能隨時間的變化，研究了中空纖維膜物理老化現象。結果表明，隨著老化的進行，氣體滲透速率逐漸減小，分離系數逐漸變大，直至平衡。以自由體積擴散機理為基礎，針對非對稱中空纖維膜具有超薄皮層的特點，建立描述物理老化過程的數學模型。結果表明，該模型與實驗結果相吻合，表明自由體積擴散機理可用來描述具有超薄皮層的中空纖維膜的物理老化現象。關鍵詞：聚酰亞胺；中空纖
3、維膜；物理老化；自由體積中圖分類號：TQ028.8；TB383文獻標識碼：AThePhysicalAgingPhenomenonofPolyimideHollowFiberMembranesforGasSeparation1,222222DINGXiao-li,CAOYi-ming,ZHAOHong-yong,JIEXing-ming,WANGLi-na,LIUDan-dan,12ZHANGYu-zhong,YUANQuan(1.StateKeyLaboratoryBreedingBaseofHollowFiberMembraneMaterialandMemb
4、raneProcesses,SchoolofMaterialScienceandEngineering,TianjinPolytechnicUniversity,Tianjin300160,China;2.DalianNationalLaboratoryforCleanEnergy,DalianInstituteofChemicalPhysics,ChineseAcademyofScience,Dalian116023,China)Abstract:Thesingle-layerasymmetrichollowfibermembranesmadefrompol
5、yimide-6FDA-mPDAandthe⑧dual-layerasymmetrichollowfibermembraneswiththeselectivitylayermadefrompolyimide-Matrimid5218werepreparedwiththethicknessrangeof0.09~0.21μm.Thephysicalagingphenomenonofthepreparedasymmetrichollowfibermembraneswasstudied,andthegaspermeabilityvaryingwithtimeforg
6、asesofO2,N2,CH4andCO2weretested.Experimentalresultsshowthat,duringphysicalaging,thegaspermeancedecreaseandtheselectivitiesincrease,whilefinallybothcometoastateofequilibrium.Accordingtothecharacteristicofultra-thindenseskins,amathematicalmodelbasedonthefreevolumediffusionmechanismwas
7、developedtodescribethephysicalagingofthehollowfibermembranes.Theresultsshowthat,accordingtothemodeldeveloped,theresultscalculatedagreewellwiththeexperimentalresults.Itindicatesthatthefreevolumediffusionmechanismcanbeusedtodescribethephysicalagingphenomenonofthehollowfibermembraneswi
8、thultra-thindensesk
