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过程工程学报 2012
FabricationandCharacterizationofHierarchicallyNanostructuredPorousCarbonatedHydroxyapatiteCoatingsKeywords: carbonatedhydroxyapatite,coating,porousstructure,dissolution-precipitationreaction Abstract: Hierarchicallynanostructuredporouscarbonatedhydroxyapatitecoatings(HNPCs)onTi6Al4Vsubstratewerefabricatedbyatwo-stageapplicationroutefabricationofnacrecoatings(NCs)onTi6Al4Vsubstratebyelectrophoretictechnique,andconversionofNCstoHNPCsinaphosphatebuffersolution(PBS)bymicrowaveirradiationmethod.TheirsampleswerecharacterizedbyusingXRD,FT-IR,SEM,TEM,andN2adsorption-desorptionisotherms.TheresultsshowthatthemicrowaveirradiationtechniqueimprovesobviouslytheconversionrateofNCstoHNPCsascomparedwithconventionalmethod.AftersoakingtheNCsinthePBS,calciumionsarereleasedfromthenacreparticlesandreactwithphosphateionstoformcarbonatedhydroxyapatitenanoparticles.Thesenanoparticlesaggregatetoformtheplate-likecarbonatedapatite.Themesoporeswithasizeofabout3.9nmandmacroporeswiththediametersof1~4mmexistwithinandamongthecarbonatedapatiteplates,respectively.SimulatedbodyfluidimmersiontestsrevealthattheHNPCshaveagoodinvitrobioactivity.
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