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纳米纤维素在Pickering乳液制备中的应用研究进展.docx

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纳米纤维素在Pickering乳液制备中的应用研究进展 Title:ResearchProgressontheApplicationofNanocelluloseinPickeringEmulsionPreparation Introduction: Pickeringemulsionsarestabilizedbysolidparticlesinsteadoftraditionalsurfactants.Thisnovelemulsionstabilizationmethodoffersawiderangeofapplicationsinvariousindustries,suchasfood,cosmetics,pharmaceutics,andoilrecovery.Nanocellulose,withitsuniquephysicochemicalproperties,hasemergedasapromisingcandidateforstabilizingPickeringemulsions.ThispaperaimstoprovideanoverviewoftherecentresearchprogressontheapplicationofnanocelluloseinPickeringemulsionpreparation. 1.PropertiesandTypesofNanocellulose: 1.1Cellulosenanocrystals(CNCs):Thesearerod-likenanoparticleswithhighaspectratios,derivedfromtheacidhydrolysisofcellulosefibers.CNCsexhibitexcellentstability,mechanicalstrength,andcolloidalproperties. 1.2Cellulosenanofibrils(CNFs):Thesearelongandflexiblefibrilsderivedfromdisintegrationofcellulosefibersusingmechanicalorenzymatictreatments.CNFspossessahighsurfacearea,effectivereinforcementproperties,andexcellentgelformationabilities. 1.3Bacterialcellulose(BC):Producedbybacterialfermentation,BCpossesseshighpurity,ultrafinefibernetworks,andexcellenthydrogelproperties.Itshowssuperiormechanicalstrengthandbiocompatibility. 2.StabilizationMechanismsofNanocelluloseinPickeringEmulsions: 2.1Particlebridging:Nanocelluloseparticlescanbridgetheoil-waterinterface,therebystabilizingPickeringemulsions. 2.2Stericstabilization:Thelongandflexiblenanocellulosefibrilscanformadensenetworkattheinterface,preventingdropletcoalescence. 2.3Gelnetworkformation:Nanocellulosecancreategel-likestructuresattheinterface,increasingtheemulsionstabilitythroughincreasedviscosity. 2.4Electrostaticstabilization:Thechargedsurfaceofnanocelluloseparticlespromotesemulsionstabilitybyelectrostaticrepulsionbetweenthedroplets. 3.PreparationMethodsofNanocellulose-StabilizedPickeringEmulsions: 3.1Homogenization:High-shearhomogenizationiscommonlyusedtoproducenanocellulose-stabilizedPickeringemulsions.Thehomogeniz