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dc.contributor.authorGonçalves, Sheyla Moreira-
dc.contributor.authorChávez, Davy William Hidalgo-
dc.contributor.authorOliveira, Léa Mariza de-
dc.contributor.authorSarantopoulos, Claire Isabel Grígoli de Luca-
dc.contributor.authorCarvalho, Carlos Wanderley Piler de-
dc.contributor.authorMelo, Nathalia Ramos de-
dc.contributor.authorRosenthal, Amauri-
dc.identifier.citationGONÇALVES, S. M.; et al. Effects of high hydrostatic pressure processing on structure and functional properties of biodegradable film. Heliyon, v. 6, n. 10, p. e05213, 2020.pt_BR
dc.description.abstractEffects of high hydrostatic pressure (HHP) processing (200–400 MPa/5 or 10 min) on functional properties of cellulose acetate (CA) films were investigated. As for mechanical properties, HHP caused a reduction in tensile strength (TS), Young's modulus (YM) and an increase in elongation at break (EB). The pressurized films were more luminous, yellowish, reddish and opaque. Less affinity for water was detected for pressurized films through analyses of contact angle and moisture absorption, in addition to reducing the water vapor transmission rate (WVTR). Scanning electron microscopy (SEM) showed the occurrence of delamination for most films, except those treated with 200 MPa/10 min and 300 MPa/10 min. All films showed a predominance of amorphous structure in X-ray diffraction analysis (XRD). That is alignment with the results of differential scanning calorimetry (DSC), which presented values for glass transition temperature (Tg), water adsorption and melting temperature characteristic of materials with low crystallinity. Films treated with HHP had better mechanical resistance during the sealing at 250 C. In overall the results confirmed the minimal influence of HHP on the functional properties of the CA film and contributed to the scientific and technological knowledge for its potential application in foods processed by HHP.pt_BR
dc.description.sponsorshipCAPES / Embrapa / FAPERJpt_BR
dc.subjectMaterials sciencept_BR
dc.subjectFood sciencept_BR
dc.subjectEmerging technologypt_BR
dc.subjectCellulose acetatept_BR
dc.subjectPackaging materialspt_BR
dc.subjectHeat seal strengthpt_BR
dc.subjectPhysicochemical propertiespt_BR
dc.titleEffects of high hydrostatic pressure processing on structure and functional properties of biodegradable filmpt_BR
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