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Título: Effects of high hydrostatic pressure processing on structure and functional properties of biodegradable film
Autor(es): Gonçalves, Sheyla Moreira
Chávez, Davy William Hidalgo
Oliveira, Léa Mariza de
Sarantopoulos, Claire Isabel Grígoli de Luca
Carvalho, Carlos Wanderley Piler de
Melo, Nathalia Ramos de
Rosenthal, Amauri
Palavras-chave: Materials science
Food science
Emerging technology
Cellulose acetate
Packaging materials
Heat seal strength
Physicochemical properties
Data do documento: 2020
Citação: GONÇALVES, 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.
Resumo: Effects 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.
ISSN: 2405-8440
Aparece nas coleções:Artigos cientificos

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