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ID:33758145
大小:10.97 MB
页数:93页
时间:2019-03-01
《pga、pla纤维与纺织结构肌腱支架的降解性能分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、东华大学硕士学位论文PGA、PLA纤维及纺织结构肌腿支架的降解性能研究STUDYONTHEDEGRADATIONOFPGA、PLAFIBERSANDTEXTILESTRUCTURESCAFFOLDFORTENDONLV少了T况口ABSTRACTThedegradationrateandchangesofthemechaniealProPertiesbeforeandafterdegradationofthedegradablebiomediealmaterialshaveasignificantimPactontheirmedieal
2、aPPlieations.Therequirementsofthebiomediealartificialscaffoldmaybestatedasfollows:exeellentmeehanicalProPerties,goodbioeomPatibilityaswellasanapProPriatedegradationratetomatehtheaPPlieationtime.Onlywiththesecanmeettheneedsoforganizationalreconstruetionandrestorationoffu
3、nction.Inthefieldofdegradablebiomediealmaterials,PGAandPLAaretwoimPortantsynthctiePolymermaterials.TheybothhavelargerapPlieationsathomeandabroadatPresent.PGAhasabetterbiocomPatibility.It15suitableforeelladhesionandProliferation,buttherateofdegradationinthebody15toofast,
4、theneworganizationeannotaffordtothebodyloadwhenPGAhadlosttheirmechaniealProPerties.PLAhasaslowerdegradationratetomeetthemechaniesrequestoftheseaffoldinthebody,butdue东华大学硕士学位论文PGA、PLA纤维及纺织结构肌键支架的降解性能研究tothePoorbiocomPatibility,it15notconducivetoeelladhesionandProliferati
5、on.Asaresult,thewayofPhysiealblendingorchemicalcoPol卿eringdifferentProPortionsofPLAandPGAtogetabettermaterial,whichhasanaPProPriatedegradationratetomatchthesPeedoforganizationalreconstruetionandalsocanmeettherequirementsofthestrengthandbiocomPatibility,hasbeeometheProbl
6、emsandhotsPotsoftheresearehinthefieldofbio一degradablemediealmaterial.Inthisarticle,thebasicProPertiesofboththePolylaeticaeid(pLA)andpolyglycolicacid(pGA)fibersbymeltsPinningweremeasured.Inordertodiseusstheefl七ctofdifferentstatesofaggregationuPonthedegradationProeess,fou
7、rkindsofbraidedsutureswithdifferenteomPonents(PGA/PLA=6/O,4/2,2/4,O/6),bundleandbraidedofPGAfibersindifferentstatesofaggregationwerestudiedbytestingtheweight1055,thermalProPerties,surfaeemorphologyandmechaniealProPerties.Atthesametime,theauthorselectedtherawmaterialsofd
8、ifferentviseositiesforsPinningwithdifl七rentProeessParameterstostudytheintrinsieviseosity,drawingtemPeratureand
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