scholarly journals Effect of Zinc Oxide in Mechanical, Thermal, Contact Angle, Color and Antibacterial Properties of Polycaprlctone in Dry Food Packaging

2020 ◽  
Vol 17 (2) ◽  
pp. 17-23
Author(s):  
Ali Ali N. Obaid ◽  
Nadia A. Ali
Keyword(s):  
Contact Angle ◽  
Zinc Oxide ◽  
Food Packaging ◽  
Thermal Contact ◽  
Antibacterial Properties ◽  
Dry Food

Effect of Zinc Oxide in mechanical, thermal, contact angle, color and antibacterial properties of PCL (Polycaprlctone) in dry food packaging

2020 ◽  
Vol 16 ◽  
Author(s):  
Ali N. Obaid ◽  
Nadia A. Ali
Keyword(s):  
Contact Angle ◽  
Zinc Oxide ◽  
Food Packaging ◽  
Thermal Contact ◽  
Antibacterial Properties ◽  
Hydrophobic Surface ◽  
Green Materials ◽  
White Film ◽  
Dry Food

Background: Nowadays to use green materials can reduce environmental pollution and plastic waste. Polycaprlctone PCL is one of the natural biodegradable polymers mainly used in the production of bioplastics for packaging which is made of non-toxic compounds and is easily biodegradable. Objective: The aim was, therefore, to examine the role of zinc oxide nanopowder on the mechanical, thermal, contact angle color and antibacterial of the Polycaprlctone polymer and nanocomposites. Methods: Pure Polycaprlctone and Polycaprlctone -based bio nanocomposites joining various substance of ZnO nanoparticles from 0% to 5% (weight) were readied by means of arrangement throwing procedure. Results: The outcomes show that PCL and PCL/ZnO improve in Young's modulus, ductile however diminished in Elongation. Besides, the movies are thermally steady between 300-400°C, making them appropriate for nourishment bundling application, the shading test show that PCL have high transmitted about 96% and diminished to become white film for composites, the nanocomposites displayed expanded contact edge properties contrasted with perfect PCL and turned out to be progressively hydrophobic surface. They likewise demonstrated antibacterial movement against both Gram-positive and Gramnegative microscopic organisms, which was high restraint zone contrast and PCL. Conclusion: These biodegradable nanocomposites show extraordinary potential as an option in contrast to manufactured plastic bundling materials particularly for use in dry nourishment holders and dispensable applications.

scholarly journals Pullulan–Apple Fiber Biocomposite Films: Optical, Mechanical, Barrier, Antioxidant and Antibacterial Properties

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 870
Author(s):  
Ângelo Luís ◽  
Ana Ramos ◽  
Fernanda Domingues
Keyword(s):  
Contact Angle ◽  
Water Vapor ◽  
Water Contact Angle ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Consumer Products ◽  
Vapor Permeability ◽  
P Value ◽  
Water Contact ◽  
Biocomposite Films

More than 150 million tons of synthetic plastics are produced worldwide from petrochemical-based materials, many of these plastics being used to produce single-use consumer products like food packaging. The main goal of this work was to research the production and characterization of pullulan–apple fiber biocomposite films as a new food packaging material. The optical, mechanical, and barrier properties of the developed biocomposite films were evaluated. Furthermore, the antioxidant and antibacterial activities of the biocomposite films were additionally studied. The results show that the Tensile Index and Elastic Modulus of the pullulan–apple fiber films were significantly higher (p-value < 0.05) when compared to the pullulan films. Regarding the water vapor permeability, no significant differences (p-value < 0.05) were observed in water vapor transmission rate (WVTR) when the apple fiber was incorporated into the biocomposite films. A significant increase (p-value < 0.05) of water contact angle in both sides of the films was observed when the apple fiber was incorporated into pullulan, indicating an increase in the hydrophobicity of the developed biocomposite films. It is worth noting the hydrophobicity of the (rough) upper side of the pullulan–apple fiber films, which present a water contact angle of 109.75°. It was possible to verify the microbial growth inhibition around the pullulan–apple fiber films for all the tested bacteria.

scholarly journals Wettability, Thermal Stability, and Antibacterial Properties of Polycaprolactone /ZnO Nanocomposites in Packaging

2020 ◽  
Vol 18 (47) ◽  
pp. 1-10
Author(s):  
Ali N. Obaid ◽  
Nadia Ali
Keyword(s):  
Thermal Stability ◽  
Zinc Oxide ◽  
Food Packaging ◽  
Antibacterial Properties ◽  
Toxic Compounds ◽  
Gram Negative ◽  
Zno Nanopowder ◽  
Bacterial Screening ◽  
Bacterial Effect

Polycaprolactone is one of the natural biodegradable polymers mainly used in bioplastics production for packaging, usually composed of non-toxic compounds and biodegradable. The aim was to examine the role of zinc oxide (ZnO) nanopowder on the,wettability , thermal and anti-bacterial effect nanocomposites.  Pure PCL and PCL-based bio- nanocomposites doped with various ratios of ZnO nanoparticles from 0% to 5wt% were prepared through the arrangement of throwing procedure.  The results show that wettability properties in relation to ideal PCL and that they were increasingly hydrophobic from 57º.8 to 69º.53 because add ZnO  nanocomposites,the thermal stability between 300 and 400 ° C makes them perfect for the application of food packaging application. Also, anti-bacterial screening against Gram-positive and Gram-negative microorganisms, which was highly variable and evident in comrades, was compared with PCL.

scholarly journals Functionalization of Polyethylene (PE) and Polypropylene (PP) Material Using Chitosan Nanoparticles with Incorporated Resveratrol as Potential Active Packaging

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2118 ◽  
Author(s):  
Tjaša Kraševac Glaser ◽  
Olivija Plohl ◽  
Alenka Vesel ◽  
Urban Ajdnik ◽  
Nataša Poklar Ulrih ◽  
...  
Keyword(s):  
Contact Angle ◽  
Food Packaging ◽  
Oxygen Plasma ◽  
Oxygen Permeability ◽  
Chitosan Nanoparticles ◽  
Antibacterial Properties ◽  
Gravimetric Method ◽  
Oxygen Plasma Treatment ◽  
Wetting Contact Angle ◽  
Macromolecular Solution

The present paper reports a novel method to improve the properties of polyethylene (PE) and polypropylene (PP) polymer foils suitable for applications in food packaging. It relates to the adsorption of chitosan-colloidal systems onto untreated and oxygen plasma-treated foil surfaces. It is hypothesized that the first coated layer of chitosan macromolecular solution enables excellent antibacterial properties, while the second (uppermost) layer contains a network of polyphenol resveratrol, embedded into chitosan nanoparticles, which enables antioxidant and antimicrobial properties simultaneously. X-ray photon spectroscopy (XPS) and infrared spectroscopy (FTIR) showed successful binding of both coatings onto foils as confirmed by gravimetric method. In addition, both attached layers (chitosan macromolecular solution and dispersion of chitosan nanoparticles with incorporated resveratrol) onto foils reduced oxygen permeability and wetting contact angle of foils; the latter indicates good anti-fog foil properties. Reduction of both oxygen permeability and wetting contact angle is more pronounced when foils are previously activated by O2 plasma. Moreover, oxygen plasma treatment improves stability and adhesion of chitosan structured adsorbates onto PP and PE foils. Foils also exhibit over 90% reduction of Staphylococcus aureus and over 77% reduction of Escherichia coli as compared to untreated foils and increase antioxidant activity for over a factor of 10. The present method may be useful in different packaging applications such as food (meat, vegetables, dairy, and bakery products) and pharmaceutical packaging, where such properties of foils are desired.

scholarly journals Effect of Sonication on the Properties of Flaxseed Gum Films Incorporated with Carvacrol

2020 ◽  
Vol 21 (5) ◽  
pp. 1637
Author(s):  
Shiyuan Fang ◽  
Weiqiang Qiu ◽  
Jun Mei ◽  
Jing Xie
Keyword(s):  
Contact Angle ◽  
Food Packaging ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Vapor Permeability ◽  
Scanning Calorimetry ◽  
Cross Sectional ◽  
Water Sorption Isotherm ◽  
Flaxseed Gum

Carvacrol is a natural compound known to be a highly effective antibacterial; however, it is a hydrophobic molecule, which is a limitation to its use within food packaging. Flaxseed gum (FG) films containing different contents of carvacrol (C) were produced by a film-casting method with sonication. The effects of sonication power and time on the properties of the FG-C films were investigated by measuring the film thickness, mechanical properties, contact angle, opacity, water vapor permeability (WVP), water sorption isotherm, Fourier transform infrared spectroscopy(FTIR), differential scanning calorimetry (DSC), antibacterial and antioxidant activities, and microstructure. The results showed that sonication power and time had significant effects on mechanical and barrier properties, film opacity, and degradability (p < 0.05). The tensile strength (TS) and elongation at break (EB) values exhibited an obvious improvement after sonication, and FG-0.5C-6030 had the lowest TS (33.40 MPa) and EB (4.46%) values. FG-C films formed a denser structure and the contact angle was improved as a result of sonication, which improved the integration of carvacrol into the FG matrix. In terms of microstructure, sonication resulted in a homogeneous and continuous crosssection of FG-C films, and regular surface and cross-sectional images were obtained through the highest acoustic intensity and longest time treatment. The FG films incorporated with carvacrol displayed antibacterial properties against Staphylococcus aureus, Vibrio parahaemolyticus, Shewanella putrefaciens, and Pseudomonas fluorescens, as well as increased antioxidant properties, and sonication was proven to enhance both of them.

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 Production of Hydrophobic Zein-Based Films Bioinspired by The Lotus Leaf Surface: Characterization and Bioactive Properties

2019 ◽  
Vol 7 (8) ◽  
pp. 267 ◽  
Author(s):  
Luís ◽  
Domingues ◽  
Ramos
Keyword(s):  
Contact Angle ◽  
Essential Oil ◽  
Food Packaging ◽  
Surface Characterization ◽  
Antibacterial Properties ◽  
Complex Surface ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Lotus Leaf ◽  
Surface Patterns

Hydrophobic zein-based functional films incorporating licorice essential oil were successfully developed as new alternative materials for food packaging. The lotus-leaf negative template was obtained using polydimethylsiloxane (PDMS). The complex surface patterns of the lotus leaves were transferred onto the surface of the zein-based films with high fidelity (positive replica), which validates the proposed proof-of-concept. The films were prepared by casting method and fully characterized by Scanning Electron Microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC). The grammage, thickness, contact angle, mechanical, optical and barrier properties of the films were measured, together with the evaluation of their biodegradability, antioxidant and antibacterial activities against common foodborne pathogens (Enterococcus faecalis and Listeria monocytogenes). The zein-based films with the incorporation of licorice essential oil presented the typical rugosities of the lotus leaf making the surfaces very hydrophobic (water contact angle of 112.50°). In addition to having antioxidant and antibacterial properties, the films also shown to be biodegradable, making them a strong alternative to the traditional plastics used in food packaging.

scholarly journals Chitosan-Zinc Oxide Composite for Active Food Packaging Applications

2018 ◽  
Vol 7 (4.30) ◽  
pp. 253 ◽  
Author(s):  
S.R. Abdul Razak ◽  
H. Basri
Keyword(s):  
Contact Angle ◽  
Zinc Oxide ◽  
Water Vapour ◽  
Food Packaging ◽  
Transmission Rate ◽  
Chitosan Film ◽  
Zno Films ◽  
One Pot ◽  
Vapour Permeability ◽  
Active Food Packaging

Chitosan-zinc oxide (C-ZnO) films were prepared by a simple one pot procedure. In order to investigate the property of C-ZnO films, two composite films were prepared by varying the loading of ZnO and compared with pure chitosan film (C). The films were characterized by various techniques such as FTIR, DSC, tensile, contact angle and water vapour permeability. FTIR analysis showed changes in hydrogen bonds band at 3351 cm-1 compared to pure chitosan film. The incorporation of ZnO in chitosan films increased the contact angle by 30.5% in C-ZnO1.0 film while water vapour transmission rate decreased by 7.8% compared to C film. From the tensile test, C-ZnO0.5 and C-ZnO1.0 films were found to be much superior by 1.5 times and 2.5 times respectively compared to bare chitosan film. Larger inhibition ring (by 47%) was exhibited by C-ZnO1.0 as compared to C-ZnO0.5 when tested against S.aureus. From the results, it is displayed that the incorporation of zinc oxide to chitosan improve their properties which also shown the potential to become a candidate for food active packaging.

scholarly journals Bacteriostatic Effect of a Calcined Waste Clamshell-Activated Plastic Film for Food Packaging

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1370 ◽  
Author(s):  
Chien-Ya Kao ◽  
Yen-Chieh Huang ◽  
Sheng-Yi Chiu ◽  
Ko-Liang Kuo ◽  
Pai-An Hwang
Keyword(s):  
Food Packaging ◽  
Antibacterial Properties ◽  
Viable Count ◽  
Migration Test ◽  
Bacteriostatic Effect ◽  
Fish Fillet ◽  
Plastic Bags ◽  
Plastic Bag ◽  
Raw Fish ◽  
Metal Migration

The addition of calcined waste clamshells (CCS) into polyethylene (PE) plastic bags imparts antibacterial properties due to the presence of CaO. In this study, different proportions of calcined waste clamshells were added to PE to explore its bacteriostatic effects. The PE plastic bags with 9% and 11% of CCS exhibited antibacterial efficacy. Further, total aerobic viable count (TVC) values for raw fish fillet packaging in 9% and 11% CCS-PE plastic bags for five days were similar to the 0% CCS-PE plastic bag group after three days of incubation. In addition, the CCS-PE plastic bag demonstrated stability against solvents when examined using the metal migration test under heptane, ethanol, and acetic acid treatments. The results revealed that the CCS-PE bag retains its CaO bacteriostatic efficacy and that the addition of CCS powder to PE prolongs the shelf life of raw fish fillets, as well as mitigating safety concerns from metal leakage.

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