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骨修复新型纳米羟基磷灰石复合材料组成和性能.pdf

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http://www.paper.edu.cn Nano-HACompositesforBoneRepair: 1 CompositionsandProperties YiZuo*YubaoLi ResearchCenterforNano-BiomaterialsResearchCenterforNano-Biomaterials SichuanUniversitySichuanUniversity Chengdu,P.R.China610064Chengdu,P.R.China610064 zoae@vip.sina.comnic7504@scu.edu.cn LirongMoXiangZhang ResearchCenterforNano-BiomaterialsResearchCenterforNano-Biomaterials SichuanUniversitySichuanUniversity Chengdu,P.R.China610064Chengdu,P.R.China610064 more311@126.comzzxl-1@163.com Abstract Anewcompositeofn-HAreinforcedpolyamide66andhighdensitypolyethylene (n-HA/PA/PE)compositeswaspreparedbymeltmixinginaco-rotationtwinscrew extruder.Twoseriesofn-HA/PA/PEcompositeswithdifferentcompositionwere investigatedbyuseofSEM,mechanicaltesting,waterabsorptionandFTIR.The resultsshowedthatthechangeofcompositioninfluencedsignificantlytheproperties ofn-HA/PA/PEcompositesbydifferentmechanism.PEmixingwithPAmatrix induceddifferentmicrostructureandadjustedwaterabsorptionandmanufacturability. n-HAfillerhadhydrogenbondingwiththepolargroupsofPA,improvingthe adhesionofinterface.Well-dispersedsphericalPEparticlesofcompositeobviously improvedthetensilestrengthandmodulusbutdecreasedthewaterabsorptionalittle. WhenmorePEadded,compositesformednetmicrostructurewithmanycavitiesand microcracksexisting.Thenetstructureledthemechanicalpropertiesdecreasingbut thewaterabsorptionlargelyimproving.Theadhesionbetweenn-HAandPAby hydrogenbondingreinforcedthemechanicalpropertiesofcompositesandalso adjustedthewaterabsorptionbyreducingthebondingbetweenPAandwater molecules.Thenovelcompositemaybeusedascorticalbonesubstituteinthefuture. 1Introduction Tailor-makinghydroxyapatite-polymercompositesasmimeticsubstitutearehighlightedforcortical boneattheultra-structurelevelsuchashydroxyapatite-reinforcedcollagencomposite.Sinceearly 1980s,HA/PEcompositehasexhibitedappropriatemechanicalcompatibilitytoboneunlikemetalsand ceramics[1,2].However,lesscouplingexistedbetweennonpolarpolyethyleneandHAceramic 1Supportbyfu