Evaluation of antioxidant and antimicrobial properties of biocompatible low density polyethylene/polyaniline blends

Melt processed blends of linear low density polyethylene (LLDPE) and polyaniline, in nanorod form, synthesized via the “falling pH” method (NR-PANI), with 5%, 10%, 15% and 20% NR-PANI loading, were evaluated for active packaging applications. The oxygen permeability decreased as the amount of NR-PANI in the blends increased. The blends films also exhibited antimicrobial and antioxidant capabilities. The oxidation of fish oil was delayed in the presence of the NR-PANI/LLDPE blends, and there was a negative correlation between oxidation and the NR-PANI content in the films. Moreover, the blends films were biocompatible to mammalian cells, meaning that NR-PANI/LLDPE films can potentially be utilized for a range of active packaging applications.

► Polyaniline was successfully dispersed in polyethylene matrix. ► Polyaniline particles helped lower the oxygen permeability of polyethylene. ► The resulting blends showed antioxidant and antimicrobial efficacy. ► Oxidation of fish was slowed in the presence of polyaniline/polyethylene blends.