Surface Functionalization of Al₂O₃ Nanoparticles with Biocompatible Modifiers, Preparation and Characterization of Poly(Vinyl Pyrrolidone)/Modified Al₂O₃ Nanocomposites

ABSTRACT

In this present investigation, for increasing compatibility between nanoparticles and polymer matrix as well as preventing of aggregation, surface modification of aluminum oxide nanoparticles was performed with citric acid (CA) and ascorbic acid as biosafe and environmentally friendly modifier agents. For fabrication of nanocomposites, different contents (3, 5, 7 wt%) of nanoparticles were incorporated into the poly(vinyl pyrrolidone) matrix by ultrasonication technique. Transmission electron microscopy images of nanocomposites show a good dispersion of nanoparticles into the polymer matrix. Thermogravimetric analysis results show that the thermal stability of the nanocomposites shifted to higher temperature in comparison with the neat polymer matrix.

GRAPHICAL ABSTRACT

KEYWORDS:

• Al₂O₃
• modifiers
• nanocomposites
• poly(vinyl pyrrolidone)
• surface modification