High Oxygen Nanocomposite Barrier Films Based on Xylan and Nanocrystalline Cellulose

Nano-Micro Letters

Amit Saxena1¹  Jeffrey Kenvin3 and Arthur J. Ragauskas¹  Thomas J. Elder2¹ 

关键词: Nanocomposites;    Xylan;    Nanocrystalline cellulose;    Oxygen barrier;   

DOI  :  10.3786/nml.v2i4.p235-241

来源: Open Access House of Science and Technology

【 摘 要 】

Thegoalofthisworkistoproducenanocompositefilmwithlowoxygenpermeabilitybycastinganaqueoussolutioncontainingxylan,sorbitolandnanocrystallinecellulose.Themorphologyoftheresultingnanocompositefilmswasexaminedbyscanningelectronmicroscopyandatomicforcemicroscopywhichshowedthatcontrolfilmscontainingxylanandsorbitolhadamoreopenstructureascomparedtoxylan-sorbitolfilmscontainingsulfonatednanocrystallinecellulose.Theaverageporediameter,bulkdensity,porosityandtortuosityfactormeasurementsofcontrolxylanfilmsandnanocompositexylanfilmswereexaminedbymercuryintrusionporosimetrytechniques.Xylanfilmsreinforcedwithnanocrystallinecelluloseweredenserandexhibitedhighertortuosityfactorthanthecontrolxylanfilms.Controlxylanfilmshadaverageporediameter,bulkdensity,porosityandtortuosityfactorof0.1730μm,0.6165g/ml,53.0161%and1.258,respectivelyascomparedtoxylanfilmsreinforcedwith50%nanocrystallinecellulosewithaverageporediameterof0.0581μm,bulkdensityof1.1513g/ml,porosityof22.8906%andtortuosityfactorof2.005.Oxygentransmissionratetestsdemonstratedthatfilmspreparedwithxylan,sorbitoland5%,10%,25%and50%sulfonatednanocrystallinecelluloseexhibitedasignificantlyreducedoxygenpermeabilityof1.1387,1.0933,0.8986and0.1799cm3×μm/m2×d×kParespectivelywithrespecttofilmspreparedsolelyfromxylanandsorbitolwithaoxygenpermeabilityof189.1665cm3×μm/m2×d×kPa.Thesepropertiessuggestedthesenanocompositefilmshavepromisingbarrierproperties.

【 授权许可】

Unknown