毕业论文氧化铝中空纤维膜的表面修饰学院：专业：学生姓名：学号：指导教师：2013年6月摘要PAGE\*MERGEFORMATI摘要采用Al2O3修饰液对氧化铝多孔中空纤维陶瓷膜表面进行修饰，将修饰过的中空纤维膜在1550℃下进行高温烧结。然后测量修饰前后中空纤维膜的有效参数，以考察修饰液对氧化铝中空纤维膜的修饰效果；通过扫描电子显微镜(SEM)对修饰前后的陶瓷膜表面进行检测，来考察修饰前后的中空纤维膜表面的微观结构的变化。实验结果表明Al2O3修饰液对氧化铝多孔中空纤维陶瓷膜具有较好的修饰效果,而且修饰液的组成、涂覆方法、涂覆次数对Al2O3多孔中空纤维陶瓷膜的修饰效果有很大影响。当Al2O3修饰液的浓度比较高时，会导致修饰后的中空纤维膜修饰表面很厚，对膜的修饰不均匀，而修饰液浓度较低时，不会出现上述情况；对比提拉涂覆和旋转涂覆后的中空纤维膜可以发现，旋转涂覆对中空纤维膜的修饰效果较好；对于同种浓度且当修饰液浓度适当时，提拉两次，修饰效果会更好。关键词:Al2O3修饰液；氧化铝中空纤维陶瓷膜；表面修饰AbstractPAGE-24-AbstractTheAl2O3modifiedliquidwasusedtomodifythesurfacesofAl2O3poroushollowfiberceramicmembrane.Themodifiedhollowfibermembraneissinteredunder1550℃hightemperature.Thenmeasurethewaterflux,gasflux,bendingstrengthandporosityofhollowfibermembranetoinspectthemodificationeffectonaluminahollowfibermembrane.ThemicrostructureofsurfacesofthemodifiedmembraneswascharacterizedwithSEMmeasurements.TheresultindicatesAl2O3poroushollowfiberceramicmembranecouldbemodifiedbyAl2O3modifiedliquidwell.Andmodifiedliquidconcentration,coatingmethodsandcoatingtimeshavebigeffectonAl2O3poroushollowfiberceramicmembrane.TheconcentrationoftheAl2O3ballgrindingfluidishigher,thesurfaceoftheAl2O3hollowfibermembraneismorethickaftermodified,andthemodificationofmembraneisnotwell-distributed;Contrastthehollowfibermembraneafterdipcoatingandspincoating,wecanfoundthatthemodificationeffectforhollowfibermembraneisbetterafterSpincoating;ForthesameconcentrationofAl2O3ballgrindingfluid,thehollowfibermembraneisliftedmoretimes,themodifyresultsismorebetter.Keywords:Al2O3modifiedliquid;Al2O3poroushollowfiberceramicmembrane;Surfacemodification目录目录TOC\o"1-3"\h\uHYPERLINK\l_Toc1227摘要PAGEREF_Toc1227IHYPERLINK\l_Toc17047AbstractPAGEREF_Toc17047IIHYPERLINK\l_Toc22761第一章引言PAGEREF_Toc22761-1-HYPERLINK\l_Toc324501.1课题的背景和意义PAGEREF_Toc32450-1-HYPERLINK\l_Toc28071.2中空纤维膜的基本理论PAGEREF_Toc2807-1-HYPERLINK\l_Toc11631.2.1中空纤维膜的定义PAGEREF_Toc1163-1-HYPERLINK\l_Toc140541.2.2中空纤维膜的特点