Gas transport and thermal characterization of mono- and di-polyethylene films used for food packaging

2005 ◽  
Vol 99 (4) ◽  
pp. 1590-1599 ◽  
Author(s):  
Saša Mrkić ◽  
Kata Galić ◽  
Marica Ivanković ◽  
Sandra Hamin ◽  
Nada Ciković
Keyword(s):  
Food Packaging ◽  
Gas Transport ◽  
Thermal Characterization ◽  
Polyethylene Films

scholarly journals Development and Characterization of a Biodegradable PLA Food Packaging Hold Monoterpene–Cyclodextrin Complexes against Alternaria alternata

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1720 ◽  
Author(s):  
Velázquez-Contreras Friné ◽  
Acevedo-Parra Hector ◽  
Nuño-Donlucas Sergio Manuel ◽  
Núñez-Delicado Estrella ◽  
Gabaldón José Antonio
Keyword(s):  
Alternaria Alternata ◽  
Food Packaging ◽  
Polymer Surface ◽  
Thermal Characterization ◽  
Intermolecular Forces ◽  
Polymer Chains ◽  
Economic Losses ◽  
Poly Lactic Acid ◽  
Injection Process

The fungi of the genus Alternaria are among the main pathogens causing post-harvest diseases and significant economic losses. The consumption of Alternaria contaminated foods may be a major risk to human health, as many Alternaria species produce several toxic mycotoxins and secondary metabolites. To protect consumer health and extend the shelf life of food products, the development of new ways of packaging is of outmost importance. The aim of this work was to investigate the antifungal capacity of a biodegradable poly(lactic acid) (PLA) package filled with thymol or carvacrol complexed in β-cyclodextrins (β-CDs) by the solubility method. Once solid complexes were obtained by spray drying, varying proportions (0.0%, 1.5%, 2.5%, and 5.0 wt%) of β-CD–thymol or β-CD–carvacrol were mixed with PLA for packaging development by injection process. The formation of stable complexes between β-CDs and carvacrol or thymol molecules was assessed by Fourier-transform infrared spectroscopy (FTIR). Mechanical, structural, and thermal characterization of the developed packaging was also carried out. The polymer surface showed a decrease in the number of cuts and folds as the amount of encapsulation increased, thereby reducing the stiffness of the packaging. In addition, thermogravimetric analysis (TGA) revealed a slight decrease in the temperature of degradation of PLA package as the concentration of the complexes increased, with β-CD–carvacrol or β-CDs–thymol complexes acting as plasticisers that lowered the intermolecular forces of the polymer chains, thereby improving the breaking point. Packages containing 2.5% and 5% β-CD–carvacrol, or 5% β-CD–thymol showed Alternaria alternata inhibition after 10 days of incubation revealing their potential uses in agrofood industry.

Polyethylene Films Containing Silver Nanoparticles for Applications in Food Packaging: Characterization of Physico-Chemical and Anti-Microbial Properties

2015 ◽  
Vol 15 (3) ◽  
pp. 2148-2156 ◽  
Author(s):  
Aline A. Becaro ◽  
Fernanda C. Puti ◽  
Daniel S. Correa ◽  
Elaine C. Paris ◽  
José M. Marconcini ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Food Packaging ◽  
Microbial Properties ◽  
Polyethylene Films ◽  
Physico Chemical

scholarly journals Study on Thermal Behavior of Some Biocompatible and Biodegradable Materials Based on Plasticized PLA, Chitosan, and Rosemary Ethanolic Extract

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Cornelia Vasile ◽  
Niță Tudorachi ◽  
Traian Zaharescu ◽  
Raluca Nicoleta Darie-Nita ◽  
Catalina Natalia Cheaburu-Yilmaz
Keyword(s):  
Thermal Behavior ◽  
Food Packaging ◽  
Ethanolic Extract ◽  
Thermal Characterization ◽  
Poly Lactic Acid ◽  
Rosemary Extract ◽  
Scanning Calorimetry ◽  
Efficient Protection ◽  
Ft Ir

Thermal characterization of some multifunctional environmentally friendly materials based on plasticized poly (lactic acid) (PLA)/chitosan (CS) and rosemary extract (R) previously obtained is presented. Differential scanning calorimetry (DSC) associated with other complex investigations such as chemiluminescence and coupled thermogravimetry (TG)/Fourier-transform infrared spectroscopy (FT-IR)/mass spectroscopy (MS) was performed in order to test both the thermal behavior and the biocomposition–property relationship. It was established that the rosemary ethanolic extract offers an efficient protection against thermoxidative degradation to the new developed plasticized PLA-based biocomposites which show good thermal properties, being suitable for both medical and food packaging applications.

Preparation and Characterization of Antibacterial Zn-Coated High Density Polyethylene Films by Vacuum Evaporation Technology

2012 ◽  
Vol 200 ◽  
pp. 171-174 ◽  
Author(s):  
Ya Na Li ◽  
Yan Zheng Sun ◽  
Yan Song Zhang
Keyword(s):  
Antibacterial Activity ◽  
High Density Polyethylene ◽  
Food Packaging ◽  
Barrier Properties ◽  
High Density ◽  
Vacuum Evaporation ◽  
Zinc Deposition ◽  
Polyethylene Films ◽  
Zn Content

Zn-coated HDPE films with different amount of zinc deposition were prepared via vacuum evaporation technology. AFM images showed that the size of Zn particles was decreasing evidently with the increase of the amount of Zn deposition on HDPE substrate. The Zn-coated HDPE films exhibited excellent antibacterial activity, especially for S. aureus. Compared with the HDPE film, the improvement of the barrier properties of the Zn-coated HDPE films was observed. Moreover, the barrier properties of the Zn-coated HDPE films were increasing with the elevation of the Zn content on HDPE films. The as-prepared Zn-coated HDPE films have a promising foreground applied in food packaging.

Random pseudo promptings applied to the thermal characterization of a wet porous material

1999 ◽  
Vol 6 (1) ◽  
pp. 101-108 ◽  
Author(s):  
E. Delacre ◽  
D. Defer ◽  
E. Antczak ◽  
B. Duthoit
Keyword(s):  
Porous Material ◽  
Thermal Characterization

Photoacoustic thermal characterization of the dehydration process of Agar-SiO2emulsions

2005 ◽  
Vol 125 ◽  
pp. 177-180
Author(s):  
T. Lopez ◽  
M. Picquart ◽  
G. Aguirre ◽  
Y. Freile ◽  
D. H. Aguilar ◽  
...  
Keyword(s):  
Thermal Characterization ◽  
Dehydration Process

Thermal characterization of ABS-Graphene blended three dimensional printed functional prototypes for electro chemical energy storage

2018 ◽  
Vol 1 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Kamaljit Singh Boparai ◽  
Rupinder Singh
Keyword(s):  
Energy Storage ◽  
Structural Changes ◽  
Fused Deposition Modeling ◽  
Morphological Changes ◽  
Three Dimensional ◽  
Thermal Characterization ◽  
Chemical Energy ◽  
Flow Index ◽  
Fused Deposition

This study highlights the thermal characterization of ABS-Graphene blended three dimensional (3D) printed functional prototypes by fused deposition modeling (FDM) process. These functional prototypes have some applications as electro-chemical energy storage devices (EESD). Initially, the suitability of ABS-Graphene composite material for FDM applications has been examined by melt flow index (MFI) test. After establishing MFI, the feedstock filament for FDM has been prepared by an extrusion process. The fabricated filament has been used for printing 3D functional prototypes for printing of in-house EESD. The differential scanning calorimeter (DSC) analysis was conducted to understand the effect on glass transition temperature with the inclusion of Graphene (Gr) particles. It has been observed that the reinforced Gr particles act as a thermal reservoir (sink) and enhances its thermal/electrical conductivity. Also, FT-IR spectra realized the structural changes with the inclusion of Gr in ABS matrix. The results are supported by scanning electron microscopy (SEM) based micrographs for understanding the morphological changes.

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