Films based on oxidized starch and cellulose from barley.
Starch and cellulose fibers were isolated from grains and the husk from barley, respectively. Biodegradable films of native starch or oxidized starches and glycerol with different concentrations of cellulose fibers (0%, 10% and 20%) were prepared. The films were characterized by morphological, mechanical, barrier, and thermal properties. Cellulose fibers isolated from the barley husk were obtained with 75% purity and high crystallinity. The morphology of the films of the oxidized starches, regardless of the fiber addition, was more homogeneous as compared to the film of the native starch. The addition of cellulose fibers in the films increased the tensile strength and decreased elongation. The water vapor permeability of the film of oxidized starch with 20% of cellulose fibers was lower than the without fibers. However the films with cellulose fibers had the highest decomposition with the initial temperature and thermal stability. The oxidized starch and cellulose fibers from barley have a good potential for use in packaging. The addition of cellulose fibers in starch films can contribute to the development of films more resistant that can be applied in food systems to maintain its integrity.
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil. Electronic address: shanisemell@hotmail.com.
Shanise Lisie Mello
SL
El Halal
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Rosana
R
Colussi
Centro de Desenvolvimento Tecnológico, Engenharia de Materiais, Universidade federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Vinícius Gonçalves
VG
Deon
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Vânia Zanella
VZ
Pinto
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Franciene Almeida
FA
Villanova
Centro de Desenvolvimento Tecnológico, Engenharia de Materiais, Universidade federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Neftali Lenin Villarreal
NL
Carreño
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Alvaro Renato Guerra
AR
Dias
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Pelotas 96010-900, RS, Brazil.
Elessandra da Rosa
Eda R
Zavareze
D002482:Cellulose / Q000737:chemistry*; D005990:Glycerol / Q000737:chemistry; D001467:Hordeum / Q000737:chemistry*; D055595:Mechanical Phenomena; D010084:Oxidation-Reduction; D010539:Permeability; D012995:Solubility; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D014835:Volatilization; D014867:Water / Q000737:chemistry
D014867:Water; D002482:Cellulose; D013213:Starch; D005990:Glycerol
Barley husk; Oxidation; Tensile strength; Thermal stability; Water vapor permeability