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Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film with Antimicrobial Properties.
J Agric Food Chem. 2017 Mar 08; 65(9):1967-1976.JA

Abstract

In this study, the reinforcement effect of different proportions of eggshell/silver (ES-Ag) nanomaterial on the structural and antimicrobial properties of 70/30 poly(butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends was investigated. The ES-Ag was synthesized using a single step ball milling process and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles. The thin films in this study were prepared using hot melt extrusion and 3D printing for mechanical and antimicrobial testing, respectively. These films were also characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), XRD, tensile testing, and antimicrobial analysis. It was found that the incorporation of ES-Ag (0.5-2.0% content) compromised the tensile properties of the blend, due to poor interaction between the matrix and the ES-Ag in the ternary systems, but thermal analysis revealed improvement in the onset of degradation temperature and char yield at 500 °C. Though film toughness was better than that of PLA, the strength was lower, yet synergistic to those of PBAT and PLA. In general, the PBAT/PLA/ES-Ag ternary system had properties intermediate to those of the pure polymers. In vitro assessment of the antimicrobial activity of these films conducted on Listeria monocytogenes and Salmonella Enteritidis bacteria revealed that the blend composite films possessed bacteriostatic effects, due to the immobilized ES-Ag nanomaterials in the blend matrix. Atomic absorption spectroscopy (AAS) analysis of water and food samples exposed to the films showed that Ag NPs were not released in distilled water and chicken breast after 72 and 168 h, respectively.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Tiimob BJ
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.
Mwinyelle G
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.
Abdela W
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.
Samuel T
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.
Jeelani S
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.
Rangari VK
Department of Materials Science and Engineering, College of Engineering, and ‡Department of Pathobiology, College of Veterinary Medicine, Tuskegee University , Tuskegee, Alabama 36088, United States.

MeSH

AnimalsAnti-Bacterial AgentsEgg ShellFood PackagingNanocompositesPolyestersSilverTensile StrengthX-Ray Diffraction

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28206760

Citation

Tiimob, Boniface J., et al. "Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film With Antimicrobial Properties." Journal of Agricultural and Food Chemistry, vol. 65, no. 9, 2017, pp. 1967-1976.
Tiimob BJ, Mwinyelle G, Abdela W, et al. Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film with Antimicrobial Properties. J Agric Food Chem. 2017;65(9):1967-1976.
Tiimob, B. J., Mwinyelle, G., Abdela, W., Samuel, T., Jeelani, S., & Rangari, V. K. (2017). Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film with Antimicrobial Properties. Journal of Agricultural and Food Chemistry, 65(9), 1967-1976. https://doi.org/10.1021/acs.jafc.7b00133
Tiimob BJ, et al. Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film With Antimicrobial Properties. J Agric Food Chem. 2017 Mar 8;65(9):1967-1976. PubMed PMID: 28206760.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanoengineered Eggshell-Silver Tailored Copolyester Polymer Blend Film with Antimicrobial Properties. AU - Tiimob,Boniface J, AU - Mwinyelle,Gregory, AU - Abdela,Woubit, AU - Samuel,Temesgen, AU - Jeelani,Shaik, AU - Rangari,Vijaya K, Y1 - 2017/02/27/ PY - 2017/2/17/pubmed PY - 2017/6/1/medline PY - 2017/2/17/entrez KW - 3D-printing KW - antimicrobial films KW - biocide KW - extrusion KW - flexible polymer blends SP - 1967 EP - 1976 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 65 IS - 9 N2 - In this study, the reinforcement effect of different proportions of eggshell/silver (ES-Ag) nanomaterial on the structural and antimicrobial properties of 70/30 poly(butylene-co-adipate terephthalate)/polylactic acid (PBAT/PLA) immiscible blends was investigated. The ES-Ag was synthesized using a single step ball milling process and characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). These results confirmed the existence of silver nanoparticles (Ag NPs) in the interstitial spaces of the eggshell particles. The thin films in this study were prepared using hot melt extrusion and 3D printing for mechanical and antimicrobial testing, respectively. These films were also characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), XRD, tensile testing, and antimicrobial analysis. It was found that the incorporation of ES-Ag (0.5-2.0% content) compromised the tensile properties of the blend, due to poor interaction between the matrix and the ES-Ag in the ternary systems, but thermal analysis revealed improvement in the onset of degradation temperature and char yield at 500 °C. Though film toughness was better than that of PLA, the strength was lower, yet synergistic to those of PBAT and PLA. In general, the PBAT/PLA/ES-Ag ternary system had properties intermediate to those of the pure polymers. In vitro assessment of the antimicrobial activity of these films conducted on Listeria monocytogenes and Salmonella Enteritidis bacteria revealed that the blend composite films possessed bacteriostatic effects, due to the immobilized ES-Ag nanomaterials in the blend matrix. Atomic absorption spectroscopy (AAS) analysis of water and food samples exposed to the films showed that Ag NPs were not released in distilled water and chicken breast after 72 and 168 h, respectively. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/28206760/Nanoengineered_Eggshell_Silver_Tailored_Copolyester_Polymer_Blend_Film_with_Antimicrobial_Properties_ L2 - https://doi.org/10.1021/acs.jafc.7b00133 DB - PRIME DP - Unbound Medicine ER -