资源描述：
《二氧化硅介孔》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、JournalofMolecularCatalysisA:Chemical264(2007)153161Preparationofmesoporoussilica/polymersulfonatecompositematerialsMasahiroFujiwaraa,∗,KumiShiokawaa,YingchunZhubaKansaiCenter,NationalInstituteofAdvancedIndustrialScienceandTechnology(AIST),1-8-31Midorigaoka,Ikeda,Osaka
2、563-8577,JapanbShanghaiInstituteofCeramics,ChineseAcademyofSciences,Shanghai200050,People’sRepublicofChinaReceived21June2006;receivedinrevisedform22August2006;accepted9September2006Availableonline15September2006AbstractMesoporoussilica/polymersulfonatecompositematerial
3、swerepreparedbysimplymixinghexadecyltrimethylammoniumbromide,polymersulfonatesandTEOS(tetraethoxysilane)inalkalineaqueoussolution.Nafionandpoly(sodium4-styrenesulfonate)wereemployedaspolymersulfonates.XRDpatternsandnitrogenadsorptiondesorptionisothermsshowedthatthepreci
4、pitatesobtainedhadmesostructuresimilartoMCM-41.Especially,thecrystallinityofhexagonalstructureofcompositematerialssynthesizedwithNafionwashigh.Fromalltheresultsobtainedhere,itisconcludedthatthepolymersulfonateresinsmightbeincorporatedinthewallframeworkofmesoporoussilica
5、matrix.However,whentheexcessamountofNafionwasmixed,theacidsitesofNafionweresignificantlylostintheobtainedmaterials.Thesecompositematerialspresentnewclassesoforganicallymodifiedmesoporoussilicas,whereorganicpolymersareincorporatedintheframeworkofmesoporoussilica.Theywereuse
6、dascatalystsfor-methylstyrenedimerizationandFriedelCraftsalkylationreactionofaromatics.©2006ElsevierB.V.Allrightsreserved.Keywords:Mesoporoussilica;Nafion;Poly(styrenesulfonate);Nano-composite;Solidacid;-Methylstyrenedimerization1.IntroductionreportedthatNafionresin,wh
7、osestructureisillustratedinFig.1,wasincorporatedintheframeworkofM41StypeofResearchesonmesoporoussilicasandrelatedmaterialsaremesoporoussilica[9].Thismaterialwasauniquecatalystforimportantfieldsofrecentmaterialscience[1,2].Especially-methylstyrenedimerization.Recently,a
8、nothergroupdevel-MCM-41anditsanalogues[2]areactivelystudiedbecauseopedthecompositematerialswithpolyacrylate[10].InFig.2,ofthei
