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Control the Location of Inorganic Nanoparticles in Block Copolymer/Nanoparticles Composites  
Control the Location of Inorganic Nanoparticles in Block Copolymer/Nanoparticles Composites
资料类型: PDF文件
关键词: Block  copolymer  Supramolecular  assembly  Location  Micelles  Self-assembly  
资料大小: 106K
所属学科: 分子表征
来源: 第六届亚欧研讨会上处理和性能增强聚合物会议文集(2013.6.2-6 武汉)
简介:
Hierarchicalpolymercompositesincorporatedwithinorganicnanoparticles(NPs)haveattractedmuchattentionduetotheirflexibledesignintermsofcontrollingsize,particledensity,andspatiallocationandefficientfabricationofnovelfunctionalmaterials.SelectivelocalizationanddistributionofNPsinpolymermatrixisoneofthemostimportantfactorswhichisdecisivefortheirpropertiesandapplications.Wewillintroduceasimple,yetversatilemethodtocontrolthelocationofnanoparticleswithinworm-likeblockcopolymermicellesbydirectedsupramolecularassembly.Typically,twokindsofhomopolymerligandsweregraftedonthesurfaceofAuNPsthroughaligandexchangeroute-athiolend-functionalpolystyrene(PS-SH)andapoly(4-vinylpyridine)(P4VP-SH).ThemodifiedNPsweredissolvedinchloroformtogetherwithPS-PVPand3-n-pentadecylphenol(PDP)whichcanformcomb-coilsupramoleculePS-PVP(PDP)zandfurtherself-assembleintohierarchicalstructures.ThelocationoftheAuNPscanbetailoredfromthecentertotheinterfaceofPSandP4VP(PDP)domainsofthesupramoleculesbyvaryingtheratioofPSandP4VPbrushesonNPssurface.Isolatedworm-likemicelleswithincorporatedAuNPswerefinallyobtainedbydisassemblyofthesupramolecule.EffectoftheAuNPssize,volumefractionofAuNPs(pNP)added,andsupramolecularsystemonthemorphologyofhybridmicellesanddistributionofNPshasbeensystematicallyinvestigated.ThesehybridmicelleswithcontrollablelocalizationofAuNPsmayextendtheapplicationsofhybridmicellesandwillfindpotentialapplicationsinoptical,microelectronicdevicesanddrugdeliverysystem.
作者: R. J. Liang, W. K. Li,J. T. Zhu
上传时间: 2013-07-04 14:16:07
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