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Preparación de Películas Compuestas de Ácido Poliláctico/Natto Modificado y Evaluación de Propiedades
Weepol Pramualkijja1, Kawee Srikulkit1
1Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
ACS omega
|February 2, 2026
Resumen
El natto recubierto de poliglutamato (PGM-natto) mejora las películas compuestas de ácido poliláctico (PLA), mejorando significativamente las propiedades mecánicas y la imprimibilidad para embalajes ecológicos. Esta innovación ofrece una solución sostenible para aplicaciones de embalaje activo.
Área de la Ciencia:
- Ciencia de los materiales
- Química de polímeros
- Ingeniería de biomateriales
Sus antecedentes:
- El natto, un alimento de soja fermentada, contiene ácido poliglutámico (γPGA).
- La modificación superficial de materiales naturales puede conferir propiedades novedosas.
- Existe una gran demanda de soluciones de embalaje sostenibles y activas.
Objetivo del estudio:
- Sintetizar PGM-natto recubierto de poliglutamato.
- Crear y caracterizar compuestos de PLA/PGM-natto.
- Evaluar el potencial de estos compuestos para embalajes activos y respetuosos con el medio ambiente.
Principales métodos:
- Síntesis in situ de PGM-natto utilizando metanol y H2SO4.
- Caracterización mediante ATR-FTIR, DSC y TGA.
- Compuesto con PLA mediante extrusión de doble husillo y fabricación de películas mediante extrusión en fundido y en láminas.
Principales resultados:
- Se sintetizó y caracterizó con éxito PGM-natto.
- Los compuestos de PLA/PGM-natto mostraron mejoras significativas en las propiedades mecánicas (resistencia a la tracción, módulo de Young, %E en la rotura) con un 1% en peso de PGM-natto.
- Un aumento del contenido de PGM-natto más allá del 1% en peso provocó una disminución de las propiedades mecánicas debido a problemas de distribución de partículas.
- La mejora de la hidrofilicidad superficial y a granel mejoró la imprimibilidad y el rendimiento de la barrera al oxígeno.
Conclusiones:
- El PGM-natto es un agente de refuerzo eficaz para el PLA.
- Los compuestos de PLA/PGM-natto ofrecen propiedades mecánicas y de barrera mejoradas.
- Estos compuestos prometen para aplicaciones de embalaje activo y sostenible.
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