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THERMODYNAMICS OF WATER VAPOR SORPTION OF FIBER-REINFORCED STARCH FILMS

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dc.creatorERIK ALPIZAR REYES
dc.date2024
dc.date.accessioned2025-01-10T15:49:32Z
dc.date.available2025-01-10T15:49:32Z
dc.date.issued2024
dc.description.abstractTHE IMPORTANCE OF ADDING CELLULOSE FIBERS TO STARCH FILMS IS THAT THEY ARE USED AS REINFORCEMENT, REDUCE THE INTERACTION OF FILMS WITH WATER, AND ENHANCE STABILITY AT LOW WATER ACTIVITY LEVELS COMPARED TO FILMS BASED ON STARCH ONLY, OFFERING NEW OPTIONS AS MATERIALS INTENDED FOR FOOD PACKAGING. THE AIM OF THIS WORK WAS TO ANALYZE THE THERMODYNAMIC PROPERTIES OF FILMS COMPOSED OF A) COMMELINA STARCH AND B) COMMELINA STARCH ADDED WITH CELLULOSE FIBERS. THE SORPTION ISOTHERMS WERE FITTED TO THE GUGGENHEIM-ANDERSON-DE BOER EQUATION (GAB). THE THERMODYNAMIC ANALYSIS ALLOWED ALLOCATING THE MINIMUM INTEGRAL ENTROPY VALUE IN THE 0.23-0.55 RANGE OF WATER ACTIVITY IN BOTH TYPES OF FILM. THE LOWEST RANGE OF WATER ACTIVITY WAS OBSERVED IN FILMS OF COMMELINA STARCH ADDED WITH CELLULOSE FIBERS. ACCORDING TO THE COMPENSATION ENTHALPY-ENTROPY THEORY, AT LOW WATER ACTIVITY VALUES (0.1 TO SIMILAR TO 0.39), THE WATER VAPOR SORPTION PROCESS WAS MAINLY DRIVEN BY ENTHALPY, WHILE AT HIGH VALUES OF WATER ACTIVITY (SIMILAR TO 0.39 TO SIMILAR TO 0.90) IT WAS MAINLY CONTROLLED BY ENTROPY. THE BEHAVIOR OF FILMS WITH OR WITHOUT THE ADDITION OF CELLULOSE FIBERS COULD BE AKIN TO THAT OF OTHER NON-IONIC, HYDROPHILIC BIOPOLYMERS. THIS CHARACTERIZATION IS IMPORTANT FOR THE HANDLING AND APPLICATION OF FILMS INTENDED FOR FOOD PACKAGING AND STORAGE.
dc.formatapplication/pdf
dc.identifier.doi10.1007/s10570-024-05857-1
dc.identifier.issn1572-882X
dc.identifier.issn0969-0239
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/13826
dc.languagespa
dc.publisherCELLULOSE
dc.relation.uri10.1007/s10570-024-05857-1
dc.rightsPUBLICADA
dc.subjectWater structure
dc.subjectMolecular dynamics
dc.subjectLiquid-vapor interface Frothers
dc.subjectFroth flotation
dc.titleTHERMODYNAMICS OF WATER VAPOR SORPTION OF FIBER-REINFORCED STARCH FILMS
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.SedeCONCEPCIÓN
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