USE OF NEW SILICA FILLERS AS ADDITIVES FOR POLYMERS USED IN PACKAGING OF FRUITS

ROMINA ARRECHE, ; MIRTA BLANCO, ; J. M. MARTIN MARTINEZ; PATRICIA VÁZQUEZ

QUíMICA NOVA

SOC BRASILEIRA QUIMICA

Lugar: San Pablo; Año: 2012

0100-4042

The objective of this work is to synthesize nanosilicas with different degree of hydrophobicity, by the sol-gel method. For that purpose, 3-aminopropyl triethoxysilane (APS) and 1,1,1,3,3,3–hexamethyldisilazane (HMDS), were added during the synthesis as modifiers. A commercial biopolymer (Hexamoll Dinch, BASF) intended for packaging of apples, was added to the new nanosilicas. The materials obtained were characterized by X-ray diffraction, SEM, TEM, potentiometric titration, porosity, specific surface area hydrophobicity/hydrophilicity by wetting test and to evaluate the change in the apple pulp color after a contact with the different silicas,  colorimetry was used.