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Electrospun Nanocomposite from Poly(lactic acid) and Cellulose Nanocrystals

資料類型：

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關(guān)鍵詞：

electrospinning cellulose nanocrystals nanocomposites poly (lactic acid)
(pla)

資料大?。?/td>

106K

所屬學(xué)科：

分子表征

來源：

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

簡(jiǎn)介：

Poly(lacticacid)(PLA),abiodegradablepolymerproducedfromrenewablebiomassresources9hasbeensuccessfullyelectrospuntoformmicrofibersornanofibersforbiomedical(e.g.,tissueengineering)andotherrelatedapplicationscl‘2].ThescaffoldsconsistingofelectrospunPLAfiberspossesseddesiredporousstructureandgoodbiocompatibilityc3].However,pureelectrospunPLAfibersnormallyhavepoormechanicalpropertiesandlowthermalandchemicalstability,whichlimittheirapplicationinmanyfields.Hence,enhancingthemechanicalandchemicalpropertiesofPLAfiberswithnano-materialsisdesirableformanyengineeringapplications.Inthiswork,fibrousnanocompositematsofcellulosenanocrystals(CNCs)incombinationwithPLAandmaleicanhydridegraftedPLA(MPLA)wereelectrospunfromasolventmixtureconsistingofN,N‘-dimethylformamideandchloroform.Morphological,mechanicalandthermalpropertieswerecharacterizedaswellasthein-vitrodegradationratesandhumanadultadiposederivedmesenchymalcellsviabilityasafunctionoffibercomposition.AveragediameteroftheelectrospunfibersdecreasedwiththeadditionofCNCinthematrix.MPLAnanocompositefibershadsmallerdiameterscomparedtoPLAcompositefibers.TensilestrengthandmodulusofthenanocompositeswereimprovedwiththeadditionofCNCsuptothe5wt%levelduetoCNCreinforcementandincreasedcomposite‘scrystallinity.ElongationofnanocompositesdecreasedsharplyatthehigherCNCcontentlevelduetotheaggregationofCNCsinmatrix.ThermalstabilityofPLAandMPLAwasimprovedfornanocompositeswithsmallerCNCcontents.Resultsofin-vitrodegradationandcellviabilityassasysindicatedthatMPLAnanocompositeshadexcellentbiodegradabilityandbiocompatibility.

作者：

C. J. Zhou, Q. F. Shi, R. Z. Huang, Q. L. Wu

上傳時(shí)間：

2013-06-21 15:12:52

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