熱分解法制備水分散性納米Fe3O4及其性能的研究.pdf

1、桂林理工大學碩士學位論文熱分解法制備水分散性納米Fe3O4及其性能的研究姓名：馮凌云申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：張寶林201204AbstractSuperparamagneticmagnetitenanoparticleswiththeinversespinelstructurehaveattractedagreatattentioninthebiomedicalfieldsuchasmagneticsepara

2、tion，drugdelivery，cancerhyperthermiaandmagneticresonanceimaging(MRI)contrastenhancementAtpresent，thepreparationmethodsofthemagnetitenanoparticlesarecoprecipitation，microemulsion，ultrasoniccavitation，thermaldecompositiona

3、ndetcAmongthesemethodsthermaldecompositionmethodcansynthesizemagnetitenanoparticleswithsmallparticles，monodispersityandhighsaturationmagnetizationInthisthesis，watersolublemagnetitenanoparticleswasfabricatedbythermaldecom

4、positionofiron(m)acet，lacetonate(Fe(acac)s)inpolyethyleneglycol(PEG)solventusingMPEGCOOHorMPEG二NH2asreducingagentDependingonthedifferentamountsofsolvent，modifyandreducingagents，wehavepreparedmagnetitenanoparticleswithdif

5、ferentmorphologiesThemainresultsareasfollows：(1)Usingsuccinicanhydridemethod，MPEGandmaleicanhydrideasthecrudematerials，TEMPOasthepolymerizationinhibitor，pyridineasthecatalyst，themagnetitenanoparticleswereproduced，andchar

6、acterizedbyFTIRTheresultsshowedthatthetargetproductMPEGCOOHWassynthesizedWithmethoxypolyethyleneglycol(MPEG)ptoluenesulfonylchloride(TsCl)andpotassiumsaltofphthalimide(PPDaslaWmaterials，aminomonomethoxypoly(ethyleneglyco

7、O(MPEGNH2)wassynthesizedbasedontheprincipleofGabrielsynthesis(2)ThewatersolublemagnetitenanoparticlesWasfabricatedbythermaldecompositionofiron(In)acetyllacetonate(Fe(acach)inpolyethyleneglycol(PEG)solventwhileusingMPEGNH

8、2私thereducingagentThecharacterizationoftheproductsWasanalyzedwithFTIR，XRD，TEM，TG，SQUIDandLaserParticleSizeandZetaPotentialAnalyzerFTIRanalysisshowedthatthetargetproductMPEG二NH2WasachievedXRDresultsshowedthatmagnetitenano

9、particlessynthesizedhadthefacecenteredcubic(fcc)crystalstructureThemorphologyanalysisbyTEMconfmnedthatmagnetitenanoparticleshadarelativelyuniformsizedistributionwi廿ltheaveragediameterof122：t：16nmZetapotentialdistribution

10、plotofthemagnetitenanoparticlesinanaqueoussuspension(pH導7)gavetheaveragevalueatabout33mVThemagnetizationcalvemeasuredbySQUIDshowedthesuperparamagneticcharacteristicsofthenanoparticleswithsaturationmagnetizationof542emu／g

11、(3)ThewatersolublemagnetitenanoparticlesWasfabricatedbythermaldecompositionofifon(1lr)acetylacetonate(Fe(acac)s)inmethoxypolyethyleneglycol(MPEO)solventwhileusingMPEGNH2觴thereducingagentatthetemperatureof320“CThemorpholo

12、gyanalysisbyTEMconfirmedthatmagnetitenanoparticleshadarelativelyuniformsizedistributionwi廿ltheaveragediameterof627491nmThemagnetizationcurvemeasuredbySQUIDshowedthesuperparamagneticcharacteristicsofthenanoparticleswithsa