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Morphology of Poly (lactic acid) Scaffolds Fabricat by a Modified Solvent Casting/Porogen Leaching Method

資料類型：

PDF文件

關(guān)鍵詞：

morphology porous scaffold porogen leaching poly(lactic acid)

資料大小：

112K

所屬學(xué)科：

分子表征

來源：

第六屆亞歐研討會上處理和性能增強(qiáng)聚合物會議文集（2013.6.2-6 武漢）

簡介：

Solventcasting/particulateleaching(SC/PL)ismostcommonlyusedforfabricatingmicro-porousandmacro-porouspolymerscaffolds.Theadvantageofthismethodisthattheprocessiseasytocarryoutandeasytocontroltheporesizeandporositybyselectingsuitableparticlesizeandamountoftheaddedsaltparticles.However,thescaffoldspreparedbythismethodusuallyhaveadensesurfacelayerandpoorinterconnectivitybetweenmacropores.Therefore,mostofthescaffoldspreparedbythismethodareeitherlimitedtotwo-dimensionalfilmsorconstructedbylaminationofseveralfilmsintodesiredshape.Inourpreviousstudy,amodifiedmethod,namelythesolventcasting/vacuumvolatilization/particulateleaching(SC/VV/PL)method,isproposedtofabricatethree-dimensionalpoly(lacticacid)(PLA)scaffoldscl]andgradedmacroporousPLAscaffoldc2]withadesiredrangeofcompressivemodulus,controlledporesizesandporosities.Inthisstudy,thePLAscaffoldswerefabricatedbytheSC/VV/PLmethodandtraditionalSC/PLmethodandwerecomparativelyresearched.Theeffectofthesizedistributionofporogenontheinterconnectivitybetweentheporeswasdiscussed,too.TheresultsshowedthattheSC/VV/PLmethodhassomeadvantageswhichcanovercomesomeshortcomingsofthetraditionalSC/PLmethod,suchasunsatisfactorysurfacestructure,longprocessingtimeandpoorinterconnectivitybetweenmacropores.Moreover,broadsizedistributionoftheporogenisbetterforforminggoodinterconnectivitybetweenmacropores.Whenthesmallsizeporogenwasblendedinthebigsizeporogen,thesmallNaCIparticlescanfilltheinterspaceamongthebigparticles.Thepackingvolumeoftheporogenwithbroadsizedistributionissmallerthanthesamequalityporogenwithnarrowsizedistribution.Thismeanstheporogenwithbroadsizedistributioncanbepackedmorecompactness.Thesmallparticlesbetweenbigparticlescancontributetowell-interconnectedporousstructure.

作者：

X. H. Gong , L. Pan, X. Wang, J. Jiang, G. Zhang

上傳時間：

2013-06-28 17:30:30

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