Antibacterial LDPE/GSE/Mel/ZnONP composite film-coated wrapping paper for convenience food packaging application

This work evaluated the improvement effects of lipids incorporation on water resistance of composite biodegradable film prepared with wheat bran cellulose/wheat gluten (WBC/WG) using an alkaline–ethanol film forming system. Four types of lipids, paraffin wax (PW), beeswax (BW), paraffin oil (PO), and oleic acid (OA), were tested. We found that PW, BW, and PO incorporation at 5–20% improved water vapor permeability (WVP) and surface hydrophobicity of prepared films. Particularly, incorporation of 15% BW could best improve the water resistance properties of the film, with the lowest WVP of 0.76 × 10−12 g/cm·s·Pa and largest water contact angle (WCA) of 86.18°. Incorporation of OA led to the decline in moisture barrier properties. SEM images revealed that different lipids incorporation changed the morphology and of the composite film, and cross-sectional morphology indicated BW-incorporated film obtained more uniform and compact structures compared to other films. Moreover, Fourier transform infrared spectra indicated that the incorporation of PW or BW enhanced the molecular interactions between the film components, confirmed by the chemical shift of characteristic peaks at 3277 and 1026 cm−1. Differential scanning calorimetry results revealed that incorporation of PW, BW, and PO increased films’ melting point, decomposition temperatures, and enthalpy values. Furthermore, the presence of most lipids decreased tensile strength and elongation at the break of the film. Overall, the composite film containing 15% BW obtained the most promising water resistance performance and acceptable mechanical properties, and it thus most suitable as a hydrophobic biodegradable material for food packaging.

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A biodegradable chitosan-based composite film reinforced by ramie fibre and lignin for food packaging

Carbohydrate Polymers ◽

10.1016/j.carbpol.2021.119078 ◽

2022 ◽

pp. 119078

Author(s):

Maocheng Ji ◽

Jianyong Li ◽

Fangyi Li ◽

Xiaojie Wang ◽

Jia Man ◽

...

Keyword(s):

Composite Film ◽

Food Packaging

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A One-Pot Synthesis and Characterization of Antibacterial Silver Nanoparticle–Cellulose Film

Polymers ◽

10.3390/polym12020440 ◽

2020 ◽

Vol 12 (2) ◽

pp. 440 ◽

Cited By ~ 1

Author(s):

Qi-Yuan Chen ◽

Sheng-Ling Xiao ◽

Sheldon Q. Shi ◽

Li-Ping Cai

Keyword(s):

Composite Film ◽

Food Packaging ◽

Antibacterial Activities ◽

Light Transmittance ◽

Ag Nps ◽

One Pot ◽

One Pot Synthesis ◽

The One

Using N,N-dimethylacetamide (DMAc) as a reducing agent in the presence of PVP-K30, the stable silver nanoparticles (Ag-NPs) solution was prepared by a convenient method for the in situ reduction of silver nitrate. The cellulose–Ag-NPs composite film (CANF) was cast in the same container using lithium chloride (LiCl) giving the Ag-NPs-PVP/DMAc solution cellulose solubility as well as γ-mercaptopropyltrimethoxysilane (MPTS) to couple Ag-NPs and cellulose. The results showed that the Ag-NPs were uniformly dispersed in solution, and the solution had strong antibacterial activities. It was found that the one-pot synthesis allowed the growth of and cross-linking with cellulose processes of Ag-NPs conducted simultaneously. Approximately 61% of Ag-NPs was successfully loaded in CANF, and Ag-NPs were uniformly dispersed in the surface and internal of the composite film. The composite film exhibited good tensile properties (tensile strength could reach up to 86.4 MPa), transparency (light transmittance exceeds 70%), thermal stability, and remarkable antibacterial activities. The sterilization effect of CANF0.04 against Staphylococcus aureus and Escherichia coli exceed 99.9%. Due to low residual LiCl/DMAc and low diffusion of Ag-NPs, the composite film may have potential for applications in food packaging and bacterial barrier.

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Nano-titanium dioxide/basic magnesium hypochlorite-containing linear low-density polyethylene composite film on food packaging application

Materials Express ◽

10.1166/mex.2020.1704 ◽

2020 ◽

Vol 10 (6) ◽

pp. 771-779

Author(s):

Jing Deng ◽

Qi Jue Chen ◽

Ding Jie Chen ◽

Luo Jie Zheng ◽

Wen Li ◽

...

Keyword(s):

Mechanical Properties ◽

Titanium Dioxide ◽

Composite Film ◽

Food Packaging ◽

Low Density Polyethylene ◽

Low Density ◽

Linear Low Density Polyethylene ◽

Nano Composite ◽

Sensory Score ◽

Nano Titanium Dioxide

The aim of this research was to probe the potential application of nano-titanium dioxide (TiO2)/basic magnesium hypochlorite (BMH)-containing linear low-density polyethylene (LLDPE) composite film in grape fresh-keeping. Mechanical properties, transparency, barrier performance and antibacterial activity of the nano-composite membrane were measured, and results showed that the antibacterial zone diameter of TiO2/BMH on pathogen-Aspergillus niger was 31.4 mm, with mixing ratio of BMH/TiO2 to 2:1. It was clearly shown that the synthesized nano-composite films decreased mechanical properties and transparency of the membrane, and also had a significant impact on sensory score, mass loss rate, decay rate, ascorbic acid (Vc) content and titratable acid content compared with LLDPE films. Moreover, the results revealed that the LLDPE antibacterial film can be effectively used for storing grapes, preserving the flavor of grapes and had an obviously effect in prolonging grapes’ shelf life.

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Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry

Polymers ◽

10.3390/polym12092096 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2096

Author(s):

Wenting Lan ◽

Siying Li ◽

Shiti Shama ◽

Yuqing Zhao ◽

Dur E. Sameen ◽

...

Keyword(s):

Antibacterial Activity ◽

Composite Film ◽

Sodium Alginate ◽

Food Packaging ◽

Base Material ◽

Morphological Properties ◽

Vapor Permeability ◽

Sem Images ◽

Active Food Packaging ◽

Ultrasonic Time

An antibacterial and anti-oxidation composite film was prepared by a casting method using sodium alginate (SA) and apple polyphenols (APPs) as the base material and glycerol as the plasticizer. Silver nanoparticles (AgNPs) were deposited by ultrasonic-assisted electrospray method. The degree of influence of the addition ratio of SA and AgNPs and different ultrasonic time on the mechanical properties, barrier properties, optical properties, and hydrophilicity of the composite film was explored. The composite films were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the SA: AgNPs ratio of 7:3 and the ultrasonic time for 30 min have the best comprehensive performance, and SA/AgNPs/APP films showed the lowest water vapor permeability value of 0.75 × 10−11 g/m·s·Pa. The composite film has good strength and softness, with tensile strength (TS) and elongation at break (E) at 23.94 MPa and 29.18%, respectively. SEM images showed that the surface of the composite film was smooth and the AgNPs’ distribution was uniform. The composite film showed broad antibacterial activity, and the antibacterial activity of Escherichia coli (92.01%) was higher than that of Staphylococcus aureus (91.26%). However, due to the addition of APP, its antioxidant activity can reach 98.39%, which has a synergistic effect on antibacterial activity. For strawberry as a model, the results showed that this composite film can prolong the shelf life of strawberries for about 8 days at 4 °C, effectively maintaining their storage quality. Compared with the commonly used PE(Polyethylene film) film on the market, it has a greater fresh-keeping effect and can be used as an active food packaging material.

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Specific migration of caprolactam and infrared characteristics of a polyamide/polyethylene composite film for food packaging under conditions of long‐term storage before use

Packaging Technology and Science ◽

10.1002/pts.2531 ◽

2020 ◽

Vol 33 (12) ◽

pp. 501-514

Author(s):

Milena Ritter ◽

Derck Schlettwein ◽

Ulrich Leist

Keyword(s):

Composite Film ◽

Food Packaging ◽

Polyethylene Composite ◽

Long Term Storage ◽

Term Storage

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Characterization and Antimicrobial Activity of Biodegradable Active Packaging Enriched with Clove and Thyme Essential Oil for Food Packaging Application

Foods ◽

10.3390/foods9081117 ◽

2020 ◽

Vol 9 (8) ◽

pp. 1117

Author(s):

Shubham Sharma ◽

Sandra Barkauskaite ◽

Brendan Duffy ◽

Amit K. Jaiswal ◽

Swarna Jaiswal

Keyword(s):

Antimicrobial Activity ◽

Composite Film ◽

Food Packaging ◽

Antimicrobial Agents ◽

Composite Films ◽

Clove Oil ◽

Thyme Oil ◽

Uv Blocking ◽

Control Film ◽

Active Food Packaging

Bioactive packaging contains natural antimicrobial agents, which inhibit the growth of microorganisms and increase the food shelf life. Solvent casting method was used to prepare the Poly (lactide)-Poly (butylene adipate-co-terephthalate) (PLA-PBAT) film incorporated with the thyme oil and clove oil in various concentrations (1 wt%, 5 wt% and 10 wt%). The clove oil composite films depicted less green and more yellow as compared to thyme oil composite films. Clove oil composite film has shown an 80% increase in the UV blocking efficiency. The tensile strength (TS) of thyme oil and clove oil composite film decreases from 1.35 MPs (control film) to 0.96 MPa and 0.79, respectively. A complete killing of S. aureus that is a reduction from 6.5 log CFU/mL to 0 log CFU/mL was observed on the 10 wt% clove oil incorporated composite film. Clove oil and thyme oil composite film had inhibited E. coli biofilm by 93.43% and 82.30%, respectively. Clove oil composite film had exhibited UV blocking properties, strong antimicrobial activity and has high potential to be used as an active food packaging.

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Physical Properties and Antimicrobial Activity of a Poly(Lactic Acid)/Poly(Trimethylene Carbonate) Film Incorporated with Thymol

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.884-885.481 ◽

2014 ◽

Vol 884-885 ◽

pp. 481-484 ◽

Cited By ~ 2

Author(s):

Yan Wu ◽

Ming Wei Yuan ◽

Ji Yi Yang ◽

Yu Yue Qin ◽

Ming Long Yuan ◽

...

Keyword(s):

Antimicrobial Activity ◽

Lactic Acid ◽

Water Vapor ◽

Composite Film ◽

Food Packaging ◽

Water Vapor Permeability ◽

Antimicrobial Activities ◽

Poly Lactic Acid ◽

Vapor Permeability ◽

Trimethylene Carbonate

Thymol (TH), which has antimicrobial effect on many food pathogens, was incorporated as antimicrobial agent into composite poly (lactic acid)/poly (trimethylene carbonate)(PLA-PTMC) films. Antimicrobial active films based on PLA-PTMC were prepared by incorporating thymol at five different concentrations: 0, 3, 6, 9 and 12 %(w/w). The mechanical characterization, water vapor permeability (WVP), and antimicrobial activity of all formulations composite film were carried out. A decrease in elastic modulus was obtained for the active composite film compared with neat PLA-PTMC film. The presence of thymol decreased water vapor permeability, with a significant antimicrobial activity. Antimicrobial activities of films were tested against Escherichia coli, Staphylococcus aurous, Listeria, Bacillus subtilis, and Salmonella. Increasing amount of the thymol in the film caused a significant increase in inhibitory zones. These results suggest that thymol incorporated PLA-PTMC films have a prospectively potential in antimicrobial food packaging.

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