title: Films based on protein isolated from croaker (Micropogonias furnieri) and palm oil.
abstract: BACKGROUND
  The microstructure and the physical, mechanical, barrier and thermal properties of films based on different concentrations of protein isolated from croaker waste (CPI) and palm oil (PO) were analyzed. Films were elaborated by a casting technique using 2, 3 and 4 g CPI 100 g(-1) of a filmogenic solution and 0, 10 and 20 g of PO 100 g(-1) CPI.
  
  
  RESULTS
  Microstructure of the film surfaces of CPI with PO showed no presence of lipid droplets dispersed in the filmogenic matrix, although a rough surface was present. Films with 3% and 4% CPI and 20% PO had the lowest rates of water vapor permeability. When there was an addition of PO to the reduced tensile strength of the films, regardless of the concentration of CPI, this addition reduced the elongation of films with 3% and 4% CPI; however, it did not influence films with 2% CPI, which did not differ from the control film (0% OP). Thermal analysis revealed that films with the highest PO percentage had a lower initial weight loss when compared with other films, due to higher hydrophobicity.
  
  
  CONCLUSIONS
  The use of protein isolate obtained from fish residues of low commercial value and palm oil is viable for the production of biodegradable films because the latter constitute good barrier properties and thermal stability. © 2015 Society of Chemical Industry.
authors.affiliation: School of Chemistry and Food, Federal University of Rio Grande, 96201-900, Rio Grande, RS, Brazil.|Department of Agro-industrial Science and Technology, Federal University of Pelotas, Pelotas, RS, Brazil.
authors.forename: Shanise Lisie Mello El
authors.initials: SL
authors.lastname: Halal
authors.affiliation: Department of Agro-industrial Science and Technology, Federal University of Pelotas, Pelotas, RS, Brazil.
authors.forename: Elessandra da Rosa
authors.initials: Eda R
authors.lastname: Zavareze
authors.affiliation: School of Chemistry and Food, Federal University of Rio Grande, 96201-900, Rio Grande, RS, Brazil.
authors.forename: Meritaine da
authors.initials: Md
authors.lastname: Rocha
authors.affiliation: Department of Agro-industrial Science and Technology, Federal University of Pelotas, Pelotas, RS, Brazil.
authors.forename: Vânia Zanella
authors.initials: VZ
authors.lastname: Pinto
authors.affiliation: Federal Institute of Science and Technology of Santa Catarina, 88506-400, Lages, SC, Brazil.
authors.forename: Michael Ramos
authors.initials: MR
authors.lastname: Nunes
authors.affiliation: School of Chemistry and Food, Federal University of Rio Grande, 96201-900, Rio Grande, RS, Brazil.
authors.forename: Márcia de Mello
authors.initials: Mde M
authors.lastname: Luvielmo
authors.affiliation: School of Chemistry and Food, Federal University of Rio Grande, 96201-900, Rio Grande, RS, Brazil.
authors.forename: Carlos
authors.initials: C
authors.lastname: Prentice
mesh_terms: D000818:Animals; D029941:Fish Proteins / Q000737:chemistry*; D005399:Fishes / Q000145:classification*; D018857:Food Packaging; D008422:Materials Testing; D008567:Membranes, Artificial; D064347:Microscopy, Electrochemical, Scanning; D000073878:Palm Oil; D010938:Plant Oils / Q000737:chemistry*; D013818:Thermogravimetry
chemical_list: D029941:Fish Proteins; D008567:Membranes, Artificial; D010938:Plant Oils; D000073878:Palm Oil
keywords: films; fish; palm oil; protein