Articulo
Low density polyethylene (ldpe) nanocomposites with passive and active barrier properties
JOURNAL OF THE CHILEAN CHEMICAL SOCIETY;
J. Chil. Chem. Soc.
Registro en:
0
D10I1234
D10I1234
WOS:000342613100009
0717-9707
Autor
Perez-Rivera, Monica de Los Angeles
Rivas-Quiroz, Bernabe Luis
Garrido-Miranda, Karla A.
Campos-Requena, Victor H.
Martinez, Miguel
Castano, Johanna
Maldonado-Mendoza, Alvaro Andres
Institución
Resumen
Nanocomposites based on Low Density Polyethylene (LDPE) containing organically modified montmorillonite (OMMT) and polyethylene grafted with maleic anhydride (PE-g-MA) were obtained by the mixing molten state method at 130 degrees C (LDPE/PE-g-MA/Cv/OMMT). Furthermore, in order to obtain a material with active barrier properties, carvacrol (Cv) was incorporated into the nanocomposite (LDPE/PE-g-MA/Cv/OMMT). Carvacrol is an essential oil component with a high antimicrobial, antifungal, and antiparasitic capability. The nanocomposites were characterized by XRD, DSC, TGA, oxygen permeability, and tensile test. The nanocomposites without Cv (LDPE/PE-g-MA/OMMT) showed an intercalated morphology (confirmed by the X ray diffraction analysis), an improved percentage of crystallinity and a reduced permeability to oxygen (25%) as compared with LDPE. The rigidity of the resulting material correlated with the clay content as expected. The nanocomposite containing Cv (LDPE/PE-g-MA/Cv/OMMT) also show intercalated morphology with a greater displacement between the clay layers as compared with the nanocomposite without Cv produced by intercalation of the antimicrobial agent between the layers. The antimicrobial activity of (LDPE/PE-g-MA/Cv/OMMT) was observed by the reduction or inhibition on bacterial (Escherichia coli and Staphylococcus aureus) growth. The authors thank FONDEF (Grant No DI0i1234), REDOC (MINEDUC Project UCO1202 at U. de Concepcion) and CONICYT REGIONAL CIPA (Centro de Investigacion de Polimeros Avanzados) R08C1002 1 FONDEF 0 FONDEF [DI0i1234]; REDOC (MINEDUC Project at U. de Concepcion) [UCO1202] FONDEF