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基于PAA-b-PAN嵌段共聚物胶束制备磁性碳纳米粒子.docx

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基于PAA-b-PAN嵌段共聚物胶束制备磁性碳纳米粒子 Abstract： Magneticcarbonnanoparticles(MCNs)havegainedconsiderableattentionduetotheiruniqueproperties,suchasbiocompatibility,magneticresponsiveness,andhighsurfacearea,whichmakesthempromisingmaterialsforbiomedicalapplications.Here,wereportafacilemethodforthepreparationofMCNsthroughtheself-assemblyofPAA-b-PANblockcopolymermicellesandsubsequentcarbonization.TheresultingMCNsexhibitexcellentmagneticandphotothermalproperties,aswellashighdrugloadingandcontrolleddrugreleasebehaviors.ThisapproachprovidesanewstrategyforthesynthesisofMCNswithpotentialapplicationsinbiomedicalandenvironmentalfields. Introduction： Magneticcarbonnanoparticles(MCNs)havereceivedsignificantinterestrecentlybecauseoftheiruniqueproperties,suchasbiocompatibility,magneticresponsiveness,andhighsurfacearea.MCNshavegreatpotentialascandidatesforbiomedicalapplications,includingmagneticresonanceimaging(MRI),magnetichyperthermiatherapy,anddrugdelivery.Inrecentyears,severalmethodshavebeenreportedforthesynthesisofMCNs,includinghydrothermal,solvothermal,chemicalvapordeposition,andpyrolysis.However,thesemethodshavesomelimitations,suchasalackofcontrolovertheparticlesizeandmorphology,ortheuseoftoxicorexpensiveprecursors.Therefore,itisnecessarytodevelopsimpleandefficientmethodsforthepreparationofMCNswithcontrollableproperties. Blockcopolymers,consistingoftwoormoredifferentmonomerunits,havebeenwidelyusedtodesigncomplexhierarchicalstructures.Amongthem,poly(acrylicacid)-block-poly(acrylonitrile)(PAA-b-PAN)blockcopolymermicelleshavebeenextensivelystudied,duetotheirgoodsolubilityandstabilityinwaterandorganicsolvents.ThecarboxylgroupsonthePAAblockcanprovideanidealplatformforfunctionalization,whilethePANblockcanbethermallytreatedtoobtaincarbon-basedmaterials.Recently,theself-assemblyofblockcopolymermicelleshasbeenproposedasasimpleandefficientmethodforthesynthesisofcarbonnanomaterials. Inthiswork,wereportafacilemethodforthepreparationofMCNsusingPAA-b-PANblockcopolymermicellesasatemplate.TheobtainedMC