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Production of bioactive films of carboxymethyl cellulose enriched with green coffee oil and its residues. | LitMetric

Production of bioactive films of carboxymethyl cellulose enriched with green coffee oil and its residues.

Int J Biol Macromol

Food and Nutrition Graduate Program, Laboratory of Bioactives, Nutrition School, Federal University of the State of Rio de Janeiro, UNIRIO. Av. Pasteur, 296, Urca, 22290-240 Rio de Janeiro, RJ, Brazil. Electronic address:

Published: March 2020

AI Article Synopsis

Article Abstract

Carboxymethyl cellulose (CMC)-based films were developed by incorporating green coffee oil (GCO) obtained by cold pressing and hydroalcoholic extracts of its residues. The effect of cake (CE) and sediment extracts (SE) in different proportions (20-40%) and GCO on chemical, morphological, physical, mechanical, optical, and antioxidant properties of the films was investigated. Eight fatty acids and four major phenolic compounds were identified by High-Resolution Direct-Infusion Mass Spectrometry in GCO and residue extracts. FTIR indicated interactions among CMC, phenolic compounds, and fatty acids. Films enriched with residue extracts presented heterogeneous microstructure. The tensile strength of the films decreased from 58 to 3 MPa with the extracts concentration, while elongation increased from 28 to 156% (p < 0.05). The water vapor permeability (averaging 3.94 × 10 g mm/cm h Pa) was not significantly affected by the extracts and GCO. The surface color was influenced by the type and concentration of extracts (p < 0.05), the film with SE40% had remarkable UV-vis barrier properties. The incorporation of GCO residue extracts imparted high antioxidant capacity to the CMC-based films, especially with CE40% (643.8 µmol Trolox eq./g dried film; 51.3 mg GAE/g dried film). General observations indicated the potential of these films, mainly the ones containing CE, like active packaging material for food applications.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2019.10.123DOI Listing

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