Investigating the diffusional behaviour of Irganox®1076 antioxidant in HDPE/Cloisite®15A nanocomposite‐based food contact packaging films: Effect of nanoclay loading

Abstract

In this research work, the prediction of the diffusion coefficient (Dp) of Irganox® 1076 (Ir‐76) antioxidant in HDPE‐based food contact packaging films was carried out. The diffusion of this additive was studied both, in neat HDPE film and in HDPE nanocomposites films made of HDPE matrix filled with 1, 3, and 5 wt% of a commercially available organoclay (Cloisite®15A). The diffusion experiments were carried out by using the Roe's method on films consisting of a stack of several polymer films having a total nominal thickness of 120 ± 01 μm. Diffusion coefficients were determined in the temperature range 80°C to 100°C according to the second Fick's law by measuring the evolution of the Ir‐76 concentration in the films by means of Fourier transform infrared (FTIR) spectroscopy analysis. The results indicated that the diffusion coefficient of Ir‐76 in HDPE films decreased with the addition of the organoclay, and a maximum reduction of 78% (at 23°C) in the diffusion rate of the Ir‐76 was observed at an optimum filler content of 3 wt%, thus making these films attractive for the plastic packaging industry.

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

“…The laminate film reduced permeability to CO 2 by more than one order of magnitude and reduced H 2 S permeability to an undetectable level. Cherif et al [167] studied the diffusion behavior of Irganox ® 1076 antioxidant (BASF, Ludwigshafen, Germany) in a novel food contact packaging film consisting of high-density polyethylene (HDPE)/cloisite ® 15A (BYK Additives & Instrument, Wesel, Germany) nanoclay composites. The diffusion coefficients were determined according to Fick's law, which showed that the maximum diffusion rate reduction of the antioxidant reached 78% with a three wt% nanoclay loading.…”

Investigating the impact of Cloisite® 15A nanoclays on the diffusivity of Irganox 1035 antioxidant in high‐density polyethylene nanocomposite

“…Ait cherif et al 45 also found activation energies of 103.12 and 117.05 kJ mol −1 for D p in the HDPE and HDPE/C15A, respectively, thus confirming that the incorporation of nanofillers slow down the diffusion of molecular additives.…”

“…All these results are consistent with the expected improvements and the literature data. As an example, the diffusion of Irganox 1076 in HDPE/C15A was studied by Ait cherif et al 45 using FTIR spectroscopy. Values of D p of 9.0 × 10 −11 and 7.8 × 10 −10 cm 2 s −1 were obtained at 80 and 100°C, respectively, for HDPE filled with 3 wt% of nanoclays.…”

A Theoretical and Experimental Analysis of the Effect of Nanoclay on Gas Perm‐Selectivity of Biodegradable PLA/EVA Blends in the Presence and Absence of Compatibilizer

“…TEM and XRD investigations on PLA/EVA blend nanocomposites were carried out to reveal the clay dispersion, exfoliation/intercalation states and its partition in the blend phases, as main controlling factors, which affect gas barrier properties of the final system. [38] The TEM micrographs of PLA/EVA (75/25) blend nanocomposites in the presence and absence of compatibilizer are depicted in Figure 4a,b. Combination of mainly intercalated and some exfoliated structures are seen in both the systems confirmed by XRD analysis too (Figure 4c).…”