Morphological, mechanical, barrier and properties of films based on acetylated starch and cellulose from barley.
BACKGROUND
Biodegradable films of native or acetylated starches with different concentrations of cellulose fibers (0%, 10% and 20%) were prepared. The films were characterized by morphological, mechanical, barrier, and thermal properties.


RESULTS
The tensile strength of the acetylated starch film was lower than those of the native starch film, without fibers. The addition of fibers increased the tensile strength and decreased the elongation and the moisture of native and acetylated starches films. The acetylated starch film showed higher water solubility when compared to native starch film. The addition of cellulose fibers reduced the water solubility of the acetylated starch film. The films reinforced with cellulose fiber exhibited a higher initial decomposition temperature and thermal stability.


CONCLUSIONS
The mechanical, barrier, solubility, and thermal properties are factors which direct the type of the film application in packaging for food products. The films elaborated with acetylated starches of low degree of substitution were not effective in a reduction of the water vapor permeability. The addition of the cellulose fiber in acetylated and native starches films can contribute to the development of more resistant films to be applied in food systems that need to maintain their integrity. © 2016 Society of Chemical Industry.
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Shanise Lisie Mello
SL
El Halal
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Rosana
R
Colussi
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Bárbara
B
Biduski
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Jarine Amaral do
JA
Evangelho
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Graziella Pinheiro
GP
Bruni
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Mariana Dias
MD
Antunes
Departamento de Ciência e Tecnologia Agroindustrial, Universidade Federal de Pelotas, Rio Grande do Sul, Pelotas, RS, 96010-900, Brazil.
Alvaro Renato Guerra
AR
Dias
Elessandra da Rosa
ED
Zavareze
D000107:Acetylation; D063566:Biodegradable Plastics / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D019649:Food Industry; D018857:Food Packaging / Q000379:methods*; D001467:Hordeum / Q000737:chemistry*; D006801:Humans; D010539:Permeability; D012639:Seeds / Q000737:chemistry; D012995:Solubility; D013213:Starch / Q000737:chemistry*; D013227:Steam; D013696:Temperature; D013718:Tensile Strength; D014867:Water
D063566:Biodegradable Plastics; D013227:Steam; D014867:Water; D002482:Cellulose; D013213:Starch
acetylation; barley husk; biodegradable films; cellulose fiber; tensile strength