Study of the effect of the addition of plasticizers on the physical properties of biodegradable films based on kefiran for potential application as food packaging

Montoille, Lissette; Vicencio, Constanza Morales; Fontalba, Daniel; Ortiz, J. Andrés; Moreno‐Serna, Viviana; Peponi, Laura; Matiacevich, Silvia; Zapata, Paula Andrea

doi:10.1016/j.foodchem.2021.129966

Cited by 30 publications

(15 citation statements)

References 45 publications

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“…The glass transition temperature (Tg) and the melting temperature (Tm) of the kefiran films (3% w/w) with or without the application of the cryo-treatment, and the use of plasticizers, are shown in Table 1. As can be seen, the Tg temperatures of the kefiran films, which represent the temperature at which material undergoes a structural transition from an amorphous solid state to a more viscous rubbery state [15], ranged from −3.9 to −8.2 • C, whereas the Tm ranged from 79.63 to 92.67 • C. These values that are reported herein are somewhat greater than corresponding values that are mentioned in the literature for similar kefiran films, as follows: −14 to −21 • C [15] and −15 to −20 • C [26] for Tg and for Tm 68.36 to 73.29 • C [15] and 80 to 84 • C [26]. This variation to the reported values may be the outcome of differences in the kefiran isolation and the purification methods that were used since Ghasemlou et al [15] and Montoille et al [26], contrary to our method, did not use tricloroacetic or hypercloric acid for facilitating the removal of the protein and bacterial cells.…”

Section: Effect Of Cryo-treatment-with or Without Plasticizer Additioncontrasting

confidence: 58%

“…As can be seen, the Tg temperatures of the kefiran films, which represent the temperature at which material undergoes a structural transition from an amorphous solid state to a more viscous rubbery state [15], ranged from −3.9 to −8.2 • C, whereas the Tm ranged from 79.63 to 92.67 • C. These values that are reported herein are somewhat greater than corresponding values that are mentioned in the literature for similar kefiran films, as follows: −14 to −21 • C [15] and −15 to −20 • C [26] for Tg and for Tm 68.36 to 73.29 • C [15] and 80 to 84 • C [26]. This variation to the reported values may be the outcome of differences in the kefiran isolation and the purification methods that were used since Ghasemlou et al [15] and Montoille et al [26], contrary to our method, did not use tricloroacetic or hypercloric acid for facilitating the removal of the protein and bacterial cells. In Figure 4, a characteristic thermo-gravimetric analysis diagram of the kefiran films is shown, in which the percentage film-weight change is depicted with increasing temperatures, along with its first derivative in terms of temperature.…”

Section: Effect Of Cryo-treatment-with or Without Plasticizer Additioncontrasting

confidence: 58%

“…−8.2 °C , whereas the Tm ranged from 79.63 to 92.67 °C . These values that are repo herein are somewhat greater than corresponding values that are mentioned in the lit ture for similar kefiran films, as follows: −14 to −21 °C [15] and −15 to −20 °C [26] for and for Tm 68.36 to 73.29 °C [15] and 80 to 84 °C [26]. This variation to the reported va may be the outcome of differences in the kefiran isolation and the purification meth that were used since Ghasemlou et al [15] and Montoille et al [26], contrary to method, did not use tricloroacetic or hypercloric acid for facilitating the removal of protein and bacterial cells.…”

Section: Effect Of Cryo-treatment-with or Without Plasticizer Additionmentioning

confidence: 50%

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Biodegradable Films from Kefiran-Based Cryogel Systems

2022

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Kefiran, which was isolated from kefir grains, was used for the fabrication of cryogel-films in the presence of plasticizers, such as glycerol and sorbitol. Varying concentration ratios of the exopolysaccharide/plasticizer system were employed in the process of the cryogel-film formulation and their effect on the physical (film thickness, moisture content, and solubility) and the mechanical (tensile strength and elongation at break) properties of the films was monitored. Kefiran-film vapor adsorption isotherms were calculated, and a thermal analysis of the samples was also performed. The structural characteristics of the cryogel-films were observed using confocal laser scanning microscopy. The cryo-treatment, alongside the plasticizer addition, affected the physical and mechanical properties of the kefiran films, as well as their morphology. Increasing kefiran concentration resulted in increasing the film thickness, the moisture content, and the tensile strength, while decreased their solubility and their elongation at break. Kefiran-film adsorption isotherms were affected by the cryo-treatment, the kefiran concentration, and the plasticizer use and concentration. The thermal analysis of the kefiran films showed thermal stability. The presence of the plasticizers and their increment concentration resulted in decreasing the glass transition and the melting temperatures. The cryo-treatment and the presence of plasticizers resulted in the films appearing smoother. Glycerol proved to affect more than the sorbitol–water vapor adsorption and the morphology of kefiran films.

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Section: Effect Of Cryo-treatment-with or Without Plasticizer Additioncontrasting

confidence: 58%

Section: Effect Of Cryo-treatment-with or Without Plasticizer Additioncontrasting

confidence: 58%

Section: Effect Of Cryo-treatment-with or Without Plasticizer Additionmentioning

confidence: 50%

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Biodegradable Films from Kefiran-Based Cryogel Systems

2022

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“…Therefore, specific actions such as purchasing plastic bags may be less motivated by environmental factors and more by economic ones [24]. Nevertheless, this ecological conscientiousness may help increase the adoption of alternative biodegradable materials similar to plastics and bioplastics, many of them obtained from industrial agro-food wastes, as a replacement of traditional plastic materials [14,51]. Social awareness, education and public pressure play key roles in shaping and encouraging consumer behavioral changes towards a more environmentally friendly responsibility.…”

Section: Discussionmentioning

confidence: 99%

Plastic Food Packaging: Perceptions and Attitudes of Portuguese Consumers about Environmental Impact and Recycling

et al. 2021

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The use of plastics for packaging has some advantages, since they are flexible and inexpensive. However, most plastics are of single use, which, combined with low recycling or reuse ratios, contributes substantially to environmental pollution. This work is part of a project studying the habits of Portuguese citizens concerning plastic food packaging and focuses on aspects related to sustainability. The survey was carried out via an online questionnaire about sustainability, recycling, and knowledge of the effects of plastic materials or their residues on the environment. The results were obtained based on a statistical analysis of the data. The participants tend to think about the negative impact of plastic packages on the environment; 39% sometimes do not buy plastic; and 30% try to look for alternatives. A substantial fraction, 81%, support the avoidance of plastic utensils and reduction in the use of plastic bags. Most participants have a good knowledge of recycling and strongly agree with the use of recycled materials, and 87% of respondents practice separation of different types of waste for recycling. Changing plastic consumption habits has not been an easy task. Nevertheless, it is expected that society will increasingly move toward sustainable habits, questioning its actions and considering their impact on the environment.

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“…DSC has been proven to effectively detect fake medication and the purity of drug portion [ 21 , 22 , 23 ]. The food packaging industry also uses DSC analysis to assess the plastics’ consistency in the packaging materials [ 24 , 25 , 26 ]. Combining the benefits of DSC and ATR-FTIR indicates a promising possibility to quickly identify counterfeit drugs in the market, by investigating their polymer material in drug packaging using spectroscopy and thermal analysis.…”

Section: Introductionmentioning

confidence: 99%

Proof-of-Concept of Detection of Counterfeit Medicine through Polymeric Materials Analysis of Plastics Packaging

2021

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The detection of counterfeit pharmaceuticals is always a major challenge, but the early detection of counterfeit medicine in a country will reduce the fatal risk among consumers. Technically, fast laboratory testing is vital to develop an effective surveillance and monitoring system of counterfeit medicines. This study proposed the combination of Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) and Differential Scanning Calorimetry (DSC) for the quick detection of counterfeit medicines, through the polymer analysis of blister packaging materials. A sample set containing three sets of original and counterfeit medicine was analyzed using ATR-FTIR and DSC, while the spectra from ATR-FTIR were employed as a fingerprint for the polymer characterization. Intending to analyze the polymeric material of each sample, DSC was set at a heating rate of 10 °C min−l and within a temperature range of 0–400 °C, with nitrogen as a purge gas at a flow rate of 20 mL min−1. The ATR-FTIR spectra revealed the chemical characteristics of the plastic packaging of fake and original medicines. Further analysis of the counterfeit medicine’s packaging with DSC exhibited a distinct difference from the original due to the composition of polymers in the packaging material used. Overall, this study confirmed that the rapid analysis of polymeric materials through ATR-FTIR and comparing DSC thermograms of the plastic in their packaging effectively distinguished counterfeit drug products.

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Study of the effect of the addition of plasticizers on the physical properties of biodegradable films based on kefiran for potential application as food packaging

Cited by 30 publications

References 45 publications

Biodegradable Films from Kefiran-Based Cryogel Systems

Biodegradable Films from Kefiran-Based Cryogel Systems

Plastic Food Packaging: Perceptions and Attitudes of Portuguese Consumers about Environmental Impact and Recycling

Proof-of-Concept of Detection of Counterfeit Medicine through Polymeric Materials Analysis of Plastics Packaging

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