Abstract

FERNANDEZ-QUIROZ, Daniel et al. Síntesis y caracterización de matrices orgánicas e inorgánicas conteniendo pigmentos naturales. Rev. LatinAm. Metal. Mater. [online]. 2010, vol.30, n.2, pp.159-163. ISSN 0255-6952.

This research work evaluates the embedding of carminic acid (AC) on hydroxyl-terminated oligostyrene matrixes (PSOH) and SiO₂. It describes the characterization of thin films of PSOH/AC and SiO₂/AC through scanning electron microscopy (SEM), Infrared and Raman spectroscopy. It shows that at concentrations below 0.2% by weight of AC it significantly favors integration and color films generated uniform and transparent. As a result of low molecular weight matrix M_w = 3800 hydroxyl terminated groups appears as an important factor for polymer-AC interactions, the study by FTIR presented shifts in the characteristic bands (3300 cm^-1) for the PSOH. The results by SEM for the system SiO₂/AC suggest that interactions of silanol groups with AC molecules are present.

Keywords : Oligostyrenes; silicon dioxide; carminic acid.