INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Physicochemical and antibacterial properties of PLA-Chitosan blends
Autor/es:
DANILA MERINO; YAMILA MANSILLA; CLAUDIA CASALONGUÉ; VERA ALVAREZ
Reunión:
Workshop; II Workshop on Bio-degradable Polymers and Biocomposites and III Workshop BIOPURFIL, Bio-based Polyurethane Composites with Natural Fillers; 2015
Resumen:
Chitosan (CS) is a natural, nontoxic, antimicrobial and biodegradable polymer. Chitosan films have low oxygen and carbon dioxide permeability and good mechanical properties. Therefore, these films might act as a biofunctional barrier, which seems to be a promising form of active packaging with applications in agriculture. Unfortunately, there are some limitations in these kinds of applications, because chitosan is highly moisture sensitive. One solution to overcome this drawback is to associate chitosan with a moisture-resistant polymer, while maintaining the product overall biodegradability.With the aim of modify its water-sensitive properties, in this work we added chitosan to poly-lactic acid (PLA). To enhance the compatibility between these both polymers we used hexamethylene diisocyanate (HDI) as a compatibilizer agent. The compatibilization reaction was based on the addition reaction between the isocyanate group of HDI with the hydroxyl and carboxyl groups of PLA and the hydroxyl groups of chitosan.