Effect of incorporation of clay and zinc oxide nanoparticles on oxygen barrier properties of polypropylene sheet

Abstract

The oxygen permeation properties of polypropylene nanocomposites were examined to compare their oxygen-barrier performance as affected by temperature (25-50 C), relative humidity (0-50% RH), and nanoparticle contents. Polypropylene/clay, polypropylene/ZnO composites and polypropylene/clay/ZnO ternary nanocomposites were prepared with different compositions by melt compounding to determine the optimum amount of nanoparticles. The results showed that at low temperatures, the effect of both clay and ZnO nanoparticles on oxygen barrier properties of polypropylene was very low. The resulting PP nanocomposites showed increase in oxygen permeability as temperature increased, with an Arrhenius behavior, and activation energy of 43.9-44.7 kJ/mol. The differential scanning calorimetry results indicated that the addition of clay and ZnO nanoparticles in composites slightly decreased melting temperature (T m) and crystallinity (X c %). It was found that ternary nanocomposite prepared by incorporating 5 wt% of nanoclay and surface treated 1 wt% ZnO to polypropylene had the lowest gas permeability and its oxygen permeability was 24.5% lower than that of pristine polypropylene at 50 C.

Synergism of Zinc Oxide/Organoclay-Loaded Poly(lactic acid) Hybrid Nanocomposite Plasticized by Triacetin for Sustainable Active Food Packaging

“…The second peak of T m2 occurred at a lower temperature and represented the formation of a disordered crystalline form of PLA, as reported by Zhang et al [42]. The Χ c values of the PLA/OC5 and PLA/OC5/ ZnO5 nanocomposites were lower than that of neat PLA, similarly observed by Atayev et al [43]. These authors suggested that the reduction in Χ c was due to the nano-fillers restricting crystalline growth, thereby slowing down the crystallization rate.…”

“…According to the WVP results, the barrier property was enhanced regardless of the decreased crystallinity. This indicated that an extended tortuous path length, arising from the homogeneously dispersed OC or OC/ZnO, dominated the permeability coefficient instead of the crystallinity of PLA [43].…”

A theoretical analysis of roll-over-web coating assessment of viscous nanofluid containing Cu-water nanoparticles

“…22 and Atayev and Oner. 23 Throughout the literature cited above, we note that there are no studies that discuss the theoretical analysis of roll-over-web coating of viscous fluid containing nanoparticles. Here, the objective is to formulate the flow mechanism of the roll-over-web coating of viscous fluid containing different nanoparticles.…”

Barrier performance and biodegradability of antibacterial poly(butylene adipate-co-terephthalate) nanocomposites reinforced with a new MWCNT-ZnO nanomaterial

“…Furthermore, the addition of radical scavengers suppressed the bacterial effect of ZnO-coated films against E. coli, potentially implicating that the ROS generation in ZnO nanoparticles played an important role in the antibacterial properties of ZnO nanoparticles. Except for the report by Atayev et al [82], whose samples may have excellent antibacterial properties due to the strong photocatalytic effect of ZnO, the results of other studies should have indicated no effective antibacterial activity. In conclusion, the results obtained from this present work demonstrated significant improvement in the overall performance of PBAT and MPBAT nanocomposites.…”