Stress transfer and matrix-cohesive fracture mechanism in microfibrillated cellulose-gelatin nanocomposite films

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dc.coverageDOI: 10.1016/j.carbpol.2018.04.059
dc.creatorQuero, Franck
dc.creatorPadilla, Cristina
dc.creatorCampos, Vanessa
dc.creatorLuengo, Jorge
dc.creatorCaballero, Leonardo
dc.creatorMelo, Francisco
dc.creatorLi, Qiang
dc.creatorEichhorn, Stephen J.
dc.creatorEnrione, Javier
dc.date2018
dc.date.accessioned2025-11-18T19:53:36Z
dc.date.available2025-11-18T19:53:36Z
dc.description<p>Microfibrillated cellulose (MFC) obtained from eucalyptus was embedded in gelatin from two sources; namely bovine and salmon gelatin. Raman spectroscopy revealed that stress is transferred more efficiently from bovine gelatin to the MFC when compared to salmon gelatin. Young's modulus, tensile strength, strain at failure and work of fracture of the nanocomposite films were improved by ∼67, 131, 43 y 243% respectively when using salmon gelatin as matrix material instead of bovine gelatin. Imaging of the tensile fracture surface of the MFC-gelatin nanocomposites revealed that crack formation occurs predominantly within bovine and salmon gelatin matrices rather than within the MFC or at the MFC/gelatin interface. This suggests that the mechanical failure mechanism in these nanocomposite materials is predominantly governed by a matrix-cohesive fracture mechanism. Both strength and flexibility are desirable properties for composite coatings made from gelatin-based materials, and so the findings of this study could assist in their utilization in the food and pharmaceutical industry.</p>eng
dc.descriptionMicrofibrillated cellulose (MFC) obtained from eucalyptus was embedded in gelatin from two sources; namely bovine and salmon gelatin. Raman spectroscopy revealed that stress is transferred more efficiently from bovine gelatin to the MFC when compared to salmon gelatin. Young's modulus, tensile strength, strain at failure and work of fracture of the nanocomposite films were improved by ∼67, 131, 43 y 243% respectively when using salmon gelatin as matrix material instead of bovine gelatin. Imaging of the tensile fracture surface of the MFC-gelatin nanocomposites revealed that crack formation occurs predominantly within bovine and salmon gelatin matrices rather than within the MFC or at the MFC/gelatin interface. This suggests that the mechanical failure mechanism in these nanocomposite materials is predominantly governed by a matrix-cohesive fracture mechanism. Both strength and flexibility are desirable properties for composite coatings made from gelatin-based materials, and so the findings of this study could assist in their utilization in the food and pharmaceutical industry.spa
dc.identifierhttps://investigadores.uandes.cl/en/publications/921f0cf7-0457-4789-81b1-7ff5c777f958
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/58332
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourcevol.195 (2018) date: 2018-09-01 p.89-98
dc.subjectFracture mechanism
dc.subjectGelatin
dc.subjectInterface
dc.subjectMicrofibrillated cellulose
dc.subjectNanocomposite
dc.subjectStress transfer
dc.subjectFracture mechanism
dc.subjectGelatin
dc.subjectInterface
dc.subjectMicrofibrillated cellulose
dc.subjectNanocomposite
dc.subjectStress transfer
dc.titleStress transfer and matrix-cohesive fracture mechanism in microfibrillated cellulose-gelatin nanocomposite filmseng
dc.typeArticleeng
dc.typeArtículospa
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