Artículos de revistas
Use of new silica fillers as additives for polymers used in packaging of fruit
Fecha
2012-09-28Registro en:
Arreche, Romina; Blanco, Mirta Noemi; Patricia G. Vázquez; José M. Martín Martínez; Use of new silica fillers as additives for polymers used in packaging of fruit; Sociedade Brasileira de Química; QUíMICA NOVA; 35; 10; 28-9-2012; 1907-1911
0100-4042
1678-7064
CONICET Digital
CONICET
Autor
Arreche, Romina
Blanco, Mirta Noemi
Patricia G. Vázquez
José M. Martín Martínez
Resumen
The objective of this work was to synthesize nanosilicas with different degree of hydrophobicity by the sol-gel method, using tetraethyl orthosilicate as a precursor. For this purpose, 3-aminopropyl triethoxysilane (APS) and 1,1,1,3,3,3?hexamethyldisilazane (HMDS), were added during synthesis as modifiers. A commercial biopolymer (Hexamoll Dinch, BASF) intended for packagingof apples, was added to the new nanosilicas. The materials obtained were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, potentiometric titration, porosity, specific surface area and hydrophobicity/ hydrophilicity by wetting test. Colorimetry was used to evaluate change in apple pulp color after contact with the different silicas.