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1、pubs.acs.org/Langmuir©2011AmericanChemicalSocietyOne-StepExfoliationofKaolinitesandTheirTransformationintoNanoscrolls†††,†,‡YoshiyukiKuroda,KazuyukiIto,KenichiItabashi,andKazuyukiKuroda*†DepartmentofAppliedChemistry,FacultyofScienceandEngineering,WasedaUnivers
2、ity,3-4-1Ohkubo,‡Shinjuku-ku,Tokyo169-8555,Japan,andKagamiMemorialResearchInstituteforMaterialsScienceandTechnology,WasedaUniversity,2-8-26Nishiwaseda,Shinjuku-ku,Tokyo169-0051,JapanReceivedNovember26,2010.RevisedManuscriptReceivedDecember20,2010Kaolinitenanos
3、crolls,rolledkaolinitesheetswithatubularform,werepreparedbyaone-steprouteinwhichintercalationofguestspeciesandswellingwithsolventproceedatthesametime.Amethoxy-modifiedkaolinitewasexfoliatedbytheintercalationofhexadecyltrimethylammoniumchloride.Theformationofna
4、noscrollsbytheone-steprouteproceededonlybyseveralalkyltrimethylammoniumsaltsand1-hexadecyl-3-methylimidazoliumchloride.Intercalationofprimaryaminescausedtheformationofnanoscrollsbyatwo-steprouteinwhichtheintercalationandswellingproceedseparately.Thesuccessfulo
5、ne-steprouteisascribedtotherelativelyweakinteractionsbetweentheheadgroupsofguestspeciesandtheinterlayersurfaceofmethoxy-modifiedkaolinite,andtheinteractionisthoughttoallowtheformationofaflexiblearrayofinterlayerguestspeciesforswelling.Thetubularstructurewasmos
6、tlyretainedaftertheheattreatmentat600°Ctoformhierarchicallyporousaluminosilicateswithamorphousframeworks.Thenanoscrollsintercalatedorganicguestsspecies,whicharenotdirectlyintercalatedintomethoxy-modifiedkaolinite,betweenthescrolledlayers.Theformationroutetonan
7、oscrollsisquitedependentnotonlyonthesurfacemodificationofkaolinitebutalsoonthestructureofguestspecies.1.Introductionlayeredmaterialscanbeexfoliatedandtransformedintonanosc-rolls.Therefore,chemicalinsightsintotheweakeningoftheInorganiclayeredmaterialsarequiteus
8、efulasprecursorsof12interlayerinteractionsarerequiredforthegeneralizationofvariousnanomaterials,includingnanohybrids,nanosheets,and3formationmethodsofnanoscrolls.nanoscrolls.Ananos
