负载金纳米粒子的表面凹凸型聚合物微球的制备及其催化性能

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1、石油化丁PETR0CHEMICALTECHNOLOGY·55l·2009年第38卷第5期7~-e‘，_'．、0；‘’!：．，石油化-I-新材料、，一^，一负载金纳米粒子的表面凹凸型聚合物微球的制备及其催化性能熊万斌，周巧燕，李培培，倪忠斌，刘晓亚，陈明清(江南人学化学与材料i-．程学院，江苏无锡214122)摘要通过链转移f『f{f堪聚干f端坫换反f、Z合成r聚N一异l^J魑烯酰胺(PNIPAAm)夫分子，他Jl^』烯腑和{笨乙烯进"几分散』0聚，川得J丧j彳『lJ肜念的PNIPAAm接枝聚Il尺j烯／聚拉乙烯

2、聚合物(PNAS)微球以金酸为Au溉l，分}jlj，I50℃进ir孵热还和窜濉紫外光还原．将jPNIPAAm酰胺雇f的Au“原还原成Au纳米粒，绒谯PNAS微球的表果川透射}Uf{【微镜、xn1『线衍射、似f‘变换红外光lf{1紫外一，叮光吸收光‘法埘PNAS微球负载Au纳米粒于(Au—PNAS)进行』表征丧结果，Au纳水』二较均匀地负载：PNAS微球表【；采川醇热还原法，{c(Au“)=00025mmol／LIhJ仃70cA-的Au纳、水粒了的粒侄小}10nm；采『}j紫外光还原法得到的Au纳米粒子的棚刈较夫

3、，Au纳水粒t脱多种肜态；Au—PNAS微球jf良好的化活，30rain内叮基本f将对硝苯酚催化还原为对铤堪苯酚关键词聚Ⅳ一肄『坫婀烯髋胺；聚丙烯情；聚苯乙烯；聚合物，做球；金纳米粒于；对硝苯酚；刈氩苯盼；催化利文章编号一1ooo一8144(2009)05—0551—06：中图分类号TQ325．2文献标识码APreparationandCatalyticPropertyofAuNanoparticleDispersedPolymericMicrosphereswithSpecialMorphologyXiong

4、Wanbin，ZhouQiaoyan，LiPeipei，NiZhongbin，LiuXiaoya，ChenMingqing(SchoolofChemicalandMaterialEngineering．JiangnanUniversity，WuxiJiangsu214122．China)[AbstractPoly(N—isopropylacrylamide)(PNIPAAm)macromonomerwithavinylendgroupwasobtainedbychaintransferringradicalpo

5、lymerizationandendcappingreaction．PNIPAAm—polyacrylonitrile—polystyrene(PNAS)trimermicrosphereswithembossedmorphologywerepreparedbydispersioncopolymerizationwithPNIPAAmasstabilizer．DiametersofPNASmicrosphereswereinrangeofsub—micron．Aunanoparticlesweredispers

6、edevenlyontosurfacesofPNASmicrospheresbyinsitureductionofAu“watersolutionat50℃usingethanolasreducingagentorbyUVirradiationreductionatroomtemperature．ThepropertiesofPNASmicrosphereswithdispersedAunanoparticles(Au—PNAS)werestudiedbymeansofTEM，XRD，FrIRandUV—Vis

7、spectrometry．SizeofAunanoparticlescouldbeadjustedbychangingAu“concentrationofstartingsolution．Byusing0．0025mmol／LHAuC14solution，thediameterof70％ofobtainedAunanoparticlesweresmallerthan10nm．ButbyUVirradiationreduction，Aunanoparticleswithlargerdiameterswereobt

8、ainedandshoweddifferentmorphology．4一Nitrophenolbasicallyconvertedto4-aminophenolinwatermediuminpresenceofAu—PNAScatalystandsodiumborohydrideatambienttemperatureafterreaction30min．[Keywords]poly(