Low-density Polyethylene Films Loaded by Titanium Dioxide and Zinc Oxide Nanoparticles as a New Active Packaging System againstEscherichia coliO157:H7 in Fresh Calf Minced Meat

2017 ◽  
Vol 30 (11) ◽  
pp. 693-701 ◽  
Author(s):  
Arin Marcous ◽  
Susan Rasouli ◽  
Fatemeh Ardestani
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Zinc Oxide Nanoparticles ◽  
Active Packaging ◽  
Low Density Polyethylene ◽  
Oxide Nanoparticles ◽  
Low Density ◽  
Packaging System ◽  
Polyethylene Films ◽  
Minced Meat

Long- and short-term antibacterial properties of low-density polyethylene-based films coated with zinc oxide nanoparticles for potential use in food packaging

2019 ◽  
Vol 35 (2) ◽  
pp. 117-134 ◽  
Author(s):  
Hajer Rokbani ◽  
France Daigle ◽  
Abdellah Ajji
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Zinc Oxide Nanoparticles ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Polyethylene Film ◽  
Low Density Polyethylene ◽  
Oxide Nanoparticles ◽  
Low Density ◽  
Polyethylene Films

Concerns in food safety and the need for high-quality foods have increased the demand for extending the shelf life of packaged foods. Subsequently, promoting and investigating the development of antibacterial materials for food packaging has become inevitable. Zinc oxide nanoparticles have attracted attention lately owing to their multifunctional properties, especially antibacterial activity. For this study, antibacterial low-density polyethylene films were prepared by coating zinc oxide nanoparticles onto their surface. The low-density polyethylene film antibacterial activity was evaluated toward Gram-positive and Gram-negative bacteria. The scanning electron microscopy images showed that using anhydride-modified low-density polyethylene (LDPE-g-AM) resin permitted improved zinc oxide nanoparticle distribution on the low-density polyethylene film surface, reduced the agglomerate sizes, and reinforced the zinc oxide nanoparticle bonding to the low-density polyethylene film surface. We found that the coated low-density polyethylene films exhibited high antibacterial activity against both strains. The antibacterial tests also proved that the coated films retained their antibacterial efficiency toward Escherichia coli, even after eight months, with a reduction rate higher than 99.9%, whereas for Staphylococcus aureus the antibacterial properties for the linear low-density polyethylene (LLDPE) films decreased at eight months and improved for the LDPE-g-AM films. When the zinc oxide coated films were laminated with neat low-density polyethylene, only the LDPE-g-AM was still active against E. coli provided that the lamination thickness does not go beyond 8 µm. This research demonstrated that the coated low-density polyethylene films have excellent attributes when used as an active coating in the food packaging industry.

scholarly journals Transparent ultraviolet-shielding composite films made from dispersing pristine zinc oxide nanoparticles in low-density polyethylene

2020 ◽  
Vol 9 (1) ◽  
pp. 1368-1380
Author(s):  
Lina Cui ◽  
Canyi Huang ◽  
Hong Xia ◽  
Yiping Qiu ◽  
Qing-Qing Ni
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Polymer Concentration ◽  
Tensile Failure ◽  
Casting Temperature ◽  
Low Density Polyethylene ◽  
Critical Conditions ◽  
Dissolution Time ◽  
Oxide Nanoparticles ◽  
Low Density

Abstract This work proposes an approach to fabricate flexible transparent ultraviolet (UV)-shielding membrane by casting method, which uniformly disperses pristine zinc oxide nanoparticles (NPs) in low-density polyethylene (LDPE). The critical conditions for film fabrication, such as casting temperature, LDPE concentration in the solution, dissolution time, NP concentration, and post hot press cooling processes, are systematically studied. It is found that the casting temperature needs to be close to the melting temperature of LDPE, namely, 115°C, so that transparent film formation without cracks can be guaranteed. NP agglomerates are suppressed if the polymer concentration is controlled below 6%. For good dispersion of NPs, LDPE has to be swelled or unentangled enough in the solution (close to 200 h dissolution time), and then the NP agglomerates can be diminished due to the diffusion of the NPs into the polymer gel (322 h dissolution time). When the NPs are well-dispersed in the LDPE film, the film can completely shield UV light while allowing high transmissivity for the visible light. As the concentration of NPs in the film increases from 4 to 6%, the transmissivity of the film decreases, the tensile strength increases, and the tensile failure strain decreases.

scholarly journals Comparative absorption, distribution, and excretion of titanium dioxide and zinc oxide nanoparticles after repeated oral administration

2013 ◽  
Vol 10 (1) ◽  
pp. 9 ◽  
Author(s):  
Wan-Seob Cho ◽  
Byeong-Cheol Kang ◽  
Jong Kwon Lee ◽  
Jayoung Jeong ◽  
Jeong-Hwan Che ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Oral Administration ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Silver, titanium dioxide, and zinc oxide nanoparticles trigger miRNA/isomiR expression changes in THP-1 cells that are proportional to their health hazard potential

2019 ◽  
Vol 13 (10) ◽  
pp. 1380-1395 ◽  
Author(s):  
Joseph Ndika ◽  
Umair Seemab ◽  
Wing-Lam Poon ◽  
Vittorio Fortino ◽  
Hani El-Nezami ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Zinc Oxide Nanoparticles ◽  
Health Hazard ◽  
Oxide Nanoparticles ◽  
Hazard Potential

scholarly journals Behaviour of titanium dioxide and zinc oxide nanoparticles in the presence of wastewater-derived organic matter and implications for algal toxicity

2015 ◽  
Vol 2 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Peta A. Neale ◽  
Åsa K. Jämting ◽  
Elissa O'Malley ◽  
Jan Herrmann ◽  
Beate I. Escher
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Organic Matter ◽  
Humic Acid ◽  
Zinc Oxide Nanoparticles ◽  
Wastewater Effluent ◽  
Oxide Nanoparticles ◽  
Zno Nanomaterials ◽  
Algal Toxicity

This study compared the behaviour and effect of TiO2 and ZnO nanomaterials in wastewater effluent, humic acid and test media.

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