Physical and Antimicrobial Characterization of Self Assembled Silver Nanoparticle/Chitosan onto Low Density Polyethylene Film as Active Packaging Polymer

Colloidal Silver nanoparticles with a size of 5 nm produced by chemical reduction using poly ethylene glycol (PEG 200). Layers of silver nanoparticles and chitosan were deposited onto low density polyethylene (LDPE) substrate by layer by layer (LBL) self-assembly technique. Silver nanocomposite films were built by sequential dipping of LDPE film in either anionic silver nanoparticles or cationic chitosan. Silver nanoparticles and chitosan led to the formation of nanocomposite films possessing antimicrobial properties with the thickness of 2, 4, 8, 12 and 20 layers. Silver nanocomposite films were characterized by atomic force microscopy (AFM). Thermal, mechanical and barrier properties of LBL deposited nanocomposite films were investigated. Results showed that the LBL deposition of silver nanoparticles and chitosan increased the crystallinity of the composites and also improved mechanical and barrier properties of LDPE film significantly (p<0.05). Antimicrobial activity of silver nanocomposites againstEscherichia coliandStaphylococcus aureuswas evaluated. Growth kinetic parameters ofE.coliandS.aureusaffected by silver nanocomposites were calculated by modeling of absorbance data according to Gomperz equation. LDPE-silver nanocomposite affected bacterial growth parameters significantly (p<0.05). The specific growth rate reduced from 0.30 to 0.11 h-1forE. coliand decreased 0.27 to 0.06 h-1forS. aureus.

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Improved mechanical and barrier properties of low-density polyethylene nanocomposite films by incorporating hydrophobic graphene oxide nanosheets

RSC Advances ◽

10.1039/c5ra12694k ◽

2015 ◽

Vol 5 (98) ◽

pp. 80739-80748 ◽

Cited By ~ 17

Author(s):

Hua-Dong Huang ◽

Sheng-Yang Zhou ◽

Peng-Gang Ren ◽

Xu Ji ◽

Zhong-Ming Li

Keyword(s):

Graphene Oxide ◽

Barrier Properties ◽

Nanocomposite Films ◽

Low Density Polyethylene ◽

Packaging Materials ◽

Low Density ◽

Graphene Oxide Nanosheets

The successful conversion from hydrophilic GONSs to hydrophobic ODA–GONSs imparts LDPE nanocomposite films with enhanced mechanical and barrier performances for potential packaging materials.

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Low-Density Polyethylene Films Carrying ferula asafoetida Extract for Active Food Packaging: Thermal, Mechanical, Optical, Barrier, and Antifungal Properties

Advances in Polymer Technology ◽

10.1155/2020/4098472 ◽

2020 ◽

Vol 2020 ◽

pp. 1-15

Author(s):

Razieh Niazmand ◽

Bibi Marzieh Razavizadeh ◽

Farzaneh Sabbagh

Keyword(s):

Polymer Matrix ◽

Food Packaging ◽

Barrier Properties ◽

Low Density Polyethylene ◽

Low Density ◽

Optical Barrier ◽

Leaf Extracts ◽

Polyethylene Films ◽

Active Food Packaging ◽

Ferula Asafoetida

The physical, thermal, mechanical, optical, microstructural, and barrier properties of low-density polyethylene films (LDPE) containing ferula asafoetida leaf and gum extracts were investigated. Results showed a reduction in elasticity and tensile strength with increasing extract concentration in the polymer matrix. The melting temperature and enthalpy increased with increasing concentration of extracts. The films containing extracts had lower L∗ and a∗ and higher b∗ indices. The films containing leaf extract had more barrier potential to UV than the gum extracts. The oxygen permeability in films containing 5% of leaf and gum extracts increased by 2.3 and 2.1 times, respectively. The morphology of the active films was similar to bubble swollen islands, which was more pronounced at higher concentrations of gum and leaf extracts. FTIR results confirmed some chemical interactions of ferula extracts with the polymer matrix. At the end of day 14th, the growth rate of Aspergillus niger and Saccharomyces cerevisea in the presence of the PE-Gum-5 reduced more than PE-Leaf-5 (3.7 and 2.4 logarithmic cycles, respectively) compared to the first day. Our findings showed that active LDPE films have desire thermo-mechanical and barrier properties for food packaging.

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A study of the barrier properties of polyethylene coated with a nanocellulose/magnetite composite film

Journal of the Serbian Chemical Society ◽

10.2298/jsc151217019d ◽

2016 ◽

Vol 81 (5) ◽

pp. 589-605 ◽

Cited By ~ 2

Author(s):

Nenad Djordjevic ◽

Aleksandar Marinkovic ◽

Jasmina Nikolic ◽

Sasa Drmanic ◽

Milica Rancic ◽

...

Keyword(s):

Surface Modification ◽

Maleic Anhydride ◽

Hybrid Materials ◽

Significant Contribution ◽

Barrier Properties ◽

Chemical Activity ◽

Low Density Polyethylene ◽

Low Density ◽

Oxygen Barrier ◽

Magnetite Layer

The morphological, thermal and barrier properties of low-density polyethylene/polycaprolactone-modified nanocellulose hybrid materials were investigated in this paper. Nanonocelulose/magnetite (NC-Fe3O4) nanocomposite and maleic acid functionalized NC/magnetite (NCMA-Fe3O4) nanocomposite were prepared and used as filler at various concentrations (5, 10 and 15 wt. %) in polycaprolactone (PCL) layer. PE was coated with PCL/NC/magnetite layer. The addition of the filler did not unfavorably affect the inherent properties of the polymer, especially its barrier properties. Oxygen permeation measurements show that the oxygen barrier properties of magnetite enriched PCL film were improved due to chemical activity of added material. The highest level of barrier capacity was observed for PE samples coated with PCL based composite with NCMA-Fe3O4 micro/-nanofiller, which implies the significant contribution of nanocellulose surface modification with maleic anhydride residue to improved barrier properties.

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