资源描述：
《Polypyrrole@a-Al2O3 and聚吡咯@α-Al2O3 聚吡咯@ CeO2核壳 杂化纳米复合材料》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、JOURNALOFCOMPOSITEArticleMATERIALSJournalofCompositeMaterials2018,Vol.52(11)1433–1441!TheAuthor(s)2017Polypyrrole@a-Al2O3andReprintsandpermissions:sagepub.co.uk/journalsPermissions.navpolypyrrole@CeO2core-shellDOI:10.1177/0021998317725908journals.sagepub.com/
2、home/jcmhybridnanocomposites1,21,31,2ASSilva,SMdeSouzaandEASanchesAbstractPPy@-Al2O3andPPy@CeO2nanocompositesweresynthesizedfreeofacidsbyinsitupolymerizationandcharacterizedbyX-raydiffraction,scanningelectronmicroscopy,differentialscanningcalorimetryandDCelec
3、tricalconductivitymeas-urements.X-raydiffractionpatternofPolypyrrolerevealedasemicrystallinestructure.TheLeBailmethodwasperformedusingtheX-raydiffractionpatternofpolypyrroleandallowedthepropositionoftheunitcellparameters(P21/c,a¼9.0173A˚,b¼7.1641A˚,c¼6.4184A˚
4、,¼90,¼117.7,¼90),whichiscomposedbyadimericmoleculedisposedalongthe[001]direction.Acauliflower-likemorphologywasobservedinpolypyrrole,whichconsistsofincompletespheresformingnanoparticleclusters.Core-shellmorphologywasverifiedinthenanocompositesconsistingofa
5、thinlayerofpolymerreinforcementdisposedoverthemetaloxidesmatrices.Differentialscanningcalorimetrymeasurementsallowedverifyingthehydrophobicbehavioroftheinorganicphase,promotingtherepulsionoftheinternalwatermoleculesoutfromthepolymerphase.Thentheinitialdecompo
6、sitiontemperatureofthenanocompositeshasbecomesmaller.Thepolypyrroleelectricalconductivityislowerthanthenanocompositesandmayberelatedwiththeabsenceofhydrationwaterinnanocompositesandalsotothesurfaceconductivityduetothethinpolymerlayer.PPy@-Al2O3andPPy@CeO2nano
7、compositespresentedDCelectricalconductivity80%higherwhencomparedtotheas-synthesizedpolypyrrole.Thus,theaimofthispaperwastocharacterizestructuralandmorphologicallythepurepolypyrroleaswellasthePPy@a-Al2O3andPPy@CeO2nanocompositesandcorrelatetheseresultswiththeD
8、Celectricalconductivitymeasurements.KeywordsCore-shellnanocomposites,polypyrrole,polymermorphology,DCelectricalconductivitydifferentmethodologies,resultinginmanyapplications,Introductionsu
