Mechanical Characterization of Molecular Assemblies

《Mechanical Characterization of Molecular Assemblies》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、NORTHWESTERNUNIVERSITYMechanicalCharacterizationofMolecularAssembliesatOil/WaterInterfacesADISSERTATIONSUBMITTEDTOTHEGRADUATESCHOOLINPARTIALFULFILLMENTOFTHEREQUIREMENTSforthedegreeDOCTOROFPHILOSOPHYFieldofMaterialsScienceandEngineeringByWaYuanEVANSTON,ILLINOISDecember2012UMINu

2、mber:3547889AllrightsreservedINFORMATIONTOALLUSERSThequalityofthisreproductionisdependentuponthequalityofthecopysubmitted.Intheunlikelyeventthattheauthordidnotsendacompletemanuscriptandtherearemissingpages,thesewillbenoted.Also,ifmaterialhadtoberemoved,anotewillindicatethedele

3、tion.UMI3547889PublishedbyProQuestLLC(2012).CopyrightintheDissertationheldbytheAuthor.MicroformEdition©ProQuestLLC.Allrightsreserved.ThisworkisprotectedagainstunauthorizedcopyingunderTitle17,UnitedStatesCodeProQuestLLC.789EastEisenhowerParkwayP.O.Box1346AnnArbor,MI48106-13462©

4、CopyrightbyWaYuan2012AllRightsReserved3AbstractMechanicalCharacterizationofMolecularAssembliesatOil/WaterInterfacesWaYuanTheself-assemblyofchargedmoleculesinliquidphasesandtheirabilitytoformfunctionallayersatimmiscibleinterfacesareareasofgreatinterest.However,theimple-mentatio

5、noftheseassembliesisoftenlimitedbyalackofunderstandingofthedetailedassemblymechanisms.Inordertoenhancetheperformanceofinterfacialassembliesitisessentialtobeabletocharacterizethephysicalandmechanicalpropertiesofassembledlayers,aswellasdevelopmodelsystemsthatwillallowustoexamine

6、thefactorsthatgoverntheirinteractionwiththesurroundingenvironment.Thekeypurposeofthisthesisistodevelopanunderstandingofsomeoftheimportantfactorsinfluencinginterfacialassembliesatimmiscibleliquidinterfaces.Thefirstportionoftheworkinvolvesmechanicalcharacterizationofinterfaciallay

7、ersformedbylargeamphiphilicmolecules.Thestudyofblockandgradientcopolymers,revealstheeffectofcopolymersequencedistributionontheabilityofthesemoleculestoforminterfacialassemblies.Specifically,theuniquenetworkstructureformedbygradientcopolymersatoil/waterinterfacesenablesustocreate

8、arobustmembraneattheinterfacebyionic4crosslinking.Thesecondpa