Palabras clave
Polimérico
Glicerol
Espectroscopia
Jatropha
Glycine max
Cómo citar
Resumen
Se evaluó el efecto de la proporción de proteína aislada de Jatropha curcas L. y Glycine max L. en las propiedades mecánicas y de barrera de películas moldeadas, nanorreforzadas con bentonita. Las películas se prepararon con diferentes proporciones de proteína aislada de Jatropha/soja (2,5 %/97,5 % y 5 %/95 %, respectivamente). Además, se añadieron diferentes concentraciones de bentonita (0,1 % y 0,06 %) y una cantidad constante de glicerol (0,4 g/g de proteína). Se observó que la concentración del refuerzo y de la proteína afectan significativamente las propiedades mecánicas de las películas poliméricas. La mejor formulación fue la de 2,5 % de proteína de Jatropha y 0,0625 % de bentonita, obteniéndose valores de resistencia a la rotura de 0,87 ± 0,076 MPa, módulo de Young de 48,4 ± 3,3 MPa y porcentaje de elongación de 35,1 ± 5,2 %. Las propiedades de barrera mejoraron significativamente con esta misma formulación, presentando niveles de humedad de 19,1 ± 0,7 %, un porcentaje de hinchamiento de 84,6 ± 2,8 % y valores de permeabilidad de 0,007 ± 0,0001 %. La caracterización mediante espectroscopia infrarroja permitió identificar la presencia de los grupos funcionales y las interacciones de los compuestos presentes en las películas poliméricas. La adición de bentonita a la matriz proteica mejora significativamente las propiedades mecánicas y de barrera de las películas.Referencias
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