Use of new silica fillers as additives for polymers used in packaging of fruit

Química Nova

Consejo Nacional de Investigaciones Científicas y Técnicas¹  Martín-Martínez, José Miguel¹  Universidad Nacional de La Plata¹  Blanco, Mirta¹  Arreche, Romina¹  University of Alicante, Alicante, Spain¹  Vázquez, Patricia¹ 

关键词: modified silica;    SEM;    TEM.;   

DOI  :  10.1590/S0100-40422012001000003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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 packaging of 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.

【 授权许可】

Unknown