ZnO/PBAT nanocomposite films: Investigation on the mechanical and biological activity for food packaging

Polymers for Advanced Techs

2017

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In this present study, biodegradable PBAT nanocomposites containing different weight percentages (1, 3, 5, 7, and 10% w/w) of TiO2 nanoparticles were prepared by using solvent casting technique, chloroform as a solvent. The microstructure and morphology of the as‐synthesized poly(butylene adipate‐co‐terephthalate) (PBAT)/TiO2 nanocomposite films were characterized by Fourier‐transform infrared, X‐ray diffraction, scanning electron microscopy, and transmission electron microscope. The thermal degradation of PBAT composites was studied by using thermogravimetric analysis. The mechanical strength of the films was improved by increasing TiO2 concentration. Tensile strength increased from 32.60 to 63.26 MPa, respectively. Barrier properties of the PBAT/TiO2 nanocomposites were investigated by using an oxygen permeability tester. The oxygen permeability (oxygen transmission rate) decreased with increasing the TiO2 nanoparticle concentrations. The PBAT/TiO2 nanocomposite films showed profound antimicrobial activity against both Gram‐positive and Gram‐negative foodborne pathogenic bacteria, namely, Escherichia coli and Staphylococcus aureus, to understand to the zone of inhibition. These results indicated that filler–polymer interaction is important and the role of the TiO2 as a reinforcement in the nanocomposites was evident. Copyright © 2017 John Wiley & Sons, Ltd.

Section: Resultsmentioning

confidence: 99%

“…To improve the overall properties of PBAT for the suitable applications in the field of packaging, Venkatesan et al . introduce metal oxide nanoparticles to the PBAT . Researchers also try to improve the properties of PBAT by blending with other conventional polymers.…”

Section: Introductionmentioning

confidence: 99%

TiO₂ nanoparticles/poly(butylene adipate‐co‐terephthalate) bionanocomposite films for packaging applications

Polymers for Advanced Techs

2017

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“…The antimicrobial activity of the films is checked against K pneumonia and S aureus , and the results are shown in Figure . As evident from the images that the PBAT films do not show clear microbial inhibition zones, whereas Ag 2 O NPs incorporated PBAT nanocomposite films exhibit distinctive microbial inhibition zones for both the microorganisms, the zones of inhibition diameter of PBAT/Ag 2 O nanocomposites are 11.0, 12.4, 16.1, 18.2, 19.0, and 19.7 mm against K pneumonia and 11.0, 11.3, 12.0, 13.0, 13.7, and 14.0 mm against S aureus with loadings 0, 1, 3, 5, 7, and 10 wt% Ag 2 O nanoparticles, respectively. This indicates that Ag 2 O nanoparticles exhibit fair antimicrobial action against K pneumonia and S aureus .…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial, mechanical, barrier, and thermal properties of bio‐based poly (butylene adipate‐co‐terephthalate) (PBAT)/Ag₂O nanocomposite films for packaging application

Polymers for Advanced Techs

Tamilselvi

2017

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Bio-based nanocomposites of poly (butylene adipate-co-terephthalate) (PBAT)/silver oxide (Ag 2 O) were prepared by the composite film casting method using chloroform as the solvent.The prepared Ag 2 O at different ratios (1, 3, 5, 7, and 10 wt%) is incorporated in the PBAT.The PBAT nanocomposite films were subjected to structural, thermal, mechanical, barrier, and antimicrobial properties. The electron micrographs indicated uniform distribution of Ag 2 O in the PBAT matrix. However, the images indicated agglomeration of Ag 2 O particles at 10 wt% loading. The thermal stability of the nanocomposite films increased with Ag 2 O content.The tensile strength and elongation of the composite films were found to be higher than those of PBAT and increased with Ag 2 O content up to 7 wt%. The PBAT-based nanocomposite films showed the lower oxygen and water vapor permeability when compared to the PBAT film.Antimicrobial studies were performed against two food pathogenic bacteria, namely, Klebsiella pneumonia and Staphylococcus aureus.

“…In addition the particle size, the other factors, desires its suitability for various applications. Many methods were repeated for the synthesis of SnO 2 with particle size range from 2.0 to 10.0 nm, including various methods like gas-phase [8], hydrothermal [9], sol-gel [10], and wet chemical synthesis [11]. PBAT is an aliphatic/aromatic co-polyester-based polymer prepared by the reactions of the monomers 1,4-butanediol, adipic acid, and terephthalic acid.…”

Section: Introductionmentioning

confidence: 99%

Poly(butylene adipate-co-terephthalate) bionanocomposites: effect of SnO2 NPs on mechanical, thermal, morphological, and antimicrobial activity

Adv Compos Hybrid Mater

2018

As the demand for ready-made food is increasing, it is necessary to develop effective food packaging materials with antimicrobial activity to ensure microbiological safety of food. In this study, SnO 2 nanoparticles (SnO 2 NPs) are prepared with chemical precipitation method. Different amounts of SnO 2 NP S (1, 3, 5, 7, and 10 wt%) are reinforced into the poly(butylene adipate-coterephthalate) (PBAT) using ultrasonication method, and the nanocomposites are made using solvent casting method. The structural properties of nanocomposites have been analyzed with FT-IR, XRD, SEM, and TEM. The investigation on structural properties is confirming the strong attraction between the SnO 2 and the PBAT. Mechanical tests like elongation at break and tensile strength have been investigated, and our results show the enhancement in mechanical strength of nanocomposites over pure PBAT. This is due to uniform dispersion of SnO 2 NPs in the PBAT matrix and strong interaction between the carbonyl group of PBAT and oxygen atom of SnO 2 . Oxygen and water permeability of PBAT/SnO 2 showed that the nanocomposites had better barrier properties than the PBAT. In addition, the PBAT/SnO 2 (PSO-10) nanocomposites exhibited profound antibacterial activity against the food-borne pathogens E.coli and S. aureus. Therefore, PBAT/SnO 2 nanocomposites can be used for food packaging applications as it shows a good mechanical, thermal, degradation, barrier, and antimicrobial activities.