Rheological and physical properties of gelatin suspensions containing cellulose nanofibers for potential coatings.
Rheological and physical properties of edible coating formulations containing gelatin, cellulose nanofibers (CNFs), and glycerol are characterized. Measured properties are analyzed in order to optimize edible coating thickness. Results show that coating formulations density increases linearly with gelatin concentration in presence of CNFs. Surface tension decreases with either gelatin or CNF concentration increases. Power law model well described the rheological behavior of edible coating formulations since determination coefficient was high (R(2 )> 0.98) and standard error was low (SE < 0.0052). Formulations showed pseudoplastic (shear-thinning) flow behavior and no time-dependent features were observed. The flow behavior index was not significantly affected by any factor. Consistency coefficient increases with gelatin concentrations but it decreases with glycerol concentrations.
Department Food Engineering, Universidad de Cordoba, Montería, Colombia Department of Food Science and Technology, Universidad de Santiago de Chile, Santiago, Chile ricardo.andrade@usach.cl.
Ricardo D
RD
Andrade
Department of Mechanical Engineering, Universidad Técnica Federico Santa María, Santiago, Chile.
Olivier
O
Skurtys
Department of Food Science and Technology, Universidad de Santiago de Chile, Santiago, Chile.
Fernando
F
Osorio
Facultad de Ingeniería Agroindustrial, Universidad Pontificia Bolivariana, Medellín, Colombia.
Robin
R
Zuluaga
Facultad de Ingeniería Mecánica, Universidad Pontificia Bolivariana, Medellín, Colombia.
Piedad
P
Gañán
Facultad de Ingeniería Textil, Universidad Pontificia Bolivariana, Medellín, Colombia.
Cristina
C
Castro
D002482:Cellulose / Q000737:chemistry*; D005524:Food Technology; D005780:Gelatin / Q000737:chemistry*; D057139:Nanofibers / Q000737:chemistry*; D012212:Rheology
D005780:Gelatin; D002482:Cellulose
Edible coatings; cellulose nanofibers; gelatin; physical properties; rheological properties