资源描述：
《2011-paper02--Thermal， dielectric and microwave absorption properties of polyaniline–CoFe2O4 nanocomposites.pdf》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、CompositesScienceandTechnology71(2011)1754–1760ContentslistsavailableatSciVerseScienceDirectCompositesScienceandTechnologyjournalhomepage:www.elsevier.com/locate/compscitechThermal,dielectricandmicrowaveabsorptionpropertiesofpolyaniline–CoFe2O4nanocompositesaabca,⇑NamitaGa
2、ndhi,KuldeepSingh,AnilOhlan,D.P.Singh,S.K.DhawanaPolymeric&SoftMaterialsSection,NationalPhysicalLaboratory(CSIR),NewDelhi110012,IndiabDepartmentofPhysics,M.D.University,Rohtak,Haryana124001,IndiacSchoolofPhysicsandMaterialsScience,ThaparUniversity,Patiala,Punjab147004,Indi
3、aarticleinfoabstractArticlehistory:Thepresentpaperdealswiththesynthesisofconductingferromagneticpolyaniline–CoFe2O4(PC)nano-Received29December2010compositesviaone-stepchemicaloxidativepolymerizationofanilineinthepresenceofCoFe2O4nanopar-Receivedinrevisedform2August2011ticl
4、es(30–40nm).ThesenanocompositesofPChavebeencharacterizedbyhigh-resolutiontransmissionAccepted13August2011electronmicroscopy(HRTEM),X-raydiffraction(XRD),Fouriertransforminfraredspectroscopy(FTIR),Availableonline30August2011thermogravimetricanalysis(TGA)andvibratingsamplema
5、gnetometer(VSM).Extendedthermalanalysishasrevealedthattheactivationenergyofthesenanocompositesvariesfrom75.3to84.3kJ/molascom-Keywords:paredtotheactivationenergyof50.3kJ/molforpolyaniline-DBSA.Inaddition,dielectricandmicrowaveA.Nanocompositesabsorptionpropertiesofthenanoco
6、mpositeshavebeenmeasuredinthefrequencyrangeof12.4–18GHzB.ThermalpropertiesB.Magneticproperties(Ku-band)whichdemonstratethatmorethan99%attenuationofmicrowaves(SEA=21.5dB)hasbeenD.Thermogravimetricanalysis(TGA)achievedusingthesenanocomposites.Systematicinvestigationsrevealth
7、attheCoFe2O4nanoparticlesD.Transmissionelectronmicroscopy(TEM)inthepolyanilinematrixhavephenomenaleffectindeterminingthemicrowaveabsorptionpropertiesofthenanocomposites.Ó2011ElsevierLtd.Allrightsreserved.1.Introductionbulkmaterials.Intheferromagneticpolymernanocomposite,th
8、eferromagneticinclusions(nanoparticles)doboth,reduceimped-Electronicallyconductingpolymer
