Effect of crystallinity on the migration of plastic additives from polylactic acid-based food contact plastics

Petrovics, Noémi; Kirchkeszner, Csaba; Patkó, Antónia; Tábi, Tamás; Magyar, Norbert; Székely, Ilona Kovácsné; Szabó, Bálint; Nyíri, Zoltán; Eke, Zsuzsanna

doi:10.1016/j.fpsl.2023.101054

Cited by 14 publications

(4 citation statements)

References 56 publications

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“…Moisture uptake of the film samples (20 mm × 20 mm) was investigated by placing the film sample in a desiccator with 90 ± 5% relative humidity maintained with a saturated sodium chloride solution at 25 • C. At time intervals (1,3,6,12,24, and 48 h), the weight of film samples was determined. Prior to testing, the film samples were dried in a vacuum oven at room temperature for 48 h before weighing.…”

Section: Opacity (Mmmentioning

confidence: 99%

“…Among biodegradable bioplastics, poly(L-lactic acid) or poly(L-lactide) (PLLA) synthesized from bio-derived L-lactic acid is the one that has received the most attention. The reason for this is that PLLA has good thermal processability [ 3 , 4 , 5 ], good mechanical properties [ 6 ], and market availability [ 7 ]. Therefore, PLLA demonstrates acceptable qualities for food packaging that involves food contact.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide)/Zinc Oxide Nanocomposite Bioplastics for Potential Use as Flexible and Antibacterial Food Packaging

Srisuwan,

Srihanam,

Rattanasuk

et al. 2024

Polymers

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High-molecular-weight poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide) (PLLA-PEG-PLLA) is a flexible and biodegradable bioplastic that has promising potential in flexible food packaging but it has no antibacterial ability. Thus, in this work, the effect of zinc oxide nanoparticles (nano-ZnOs) which have antimicrobial activity on various properties of PLLA-PEG-PLLA was determined. The addition of nano-ZnOs enhanced the crystallization, tensile, UV-barrier, and antibacterial properties of PLLA-PEG-PLLA. However, the crystallization and tensile properties of nanocomposite films decreased again as the nano-ZnO increased beyond 2 wt%. The nano-ZnO was well distributed in the PLLA-PEG-PLLA matrix when the nano-ZnO content did not exceed 2 wt% and exhibited some nano-ZnO agglomerates when the nano-ZnO content was higher than 2 wt%. The thermal stability and moisture uptake of the PLLA-PEG-PLLA matrix decreased and the film’s opacity increased as the nano-ZnO content increased. The PLLA-PEG-PLLA/ZnO nanocomposite films showed good antibacterial activity against bacteria such as Escherichia coli and Staphylococcus aureus. It can be concluded that nano-ZnOs can be used as a multi-functional filler of the flexible PLLA-PEG-PLLA. As a result, the addition of nano-ZnOs as a nucleating, reinforcing, UV-screening, and antibacterial agent in the flexible PLLA-PEG-PLLA matrix may provide protection for both the food and the packaging during transportation and storage.

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Section: Opacity (Mmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide)/Zinc Oxide Nanocomposite Bioplastics for Potential Use as Flexible and Antibacterial Food Packaging

Srisuwan,

Srihanam,

Rattanasuk

et al. 2024

Polymers

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“…The migration rate of a material in contact with food depends on the packaging material, the type of contact (direct or indirect), the kind of food, its solubility, the initial concentration of migrant in the material, its structure, its molecular size and its polarity [61][62][63]. Overall, the migration of additives hinges on their molecular weight; the higher the molecular size, the lower its migration [64]. However, this assumption ignores the intermolecular forces built among additive-polymer interactions and the inhibition of intermolecular forces among polymer-polymer molecules.…”

Section: Overall and Specific Migrationmentioning

confidence: 99%

Obtention and Study of Polyurethane-Based Active Packaging with Curcumin and/or Chitosan Additives for Fruits and Vegetables—Part I: Analysis of Morphological, Mechanical, Barrier, and Migration Properties

Ruiz,

Uscátegui,

Diaz

et al. 2023

Polymers

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Several polyurethane-formulated films with curcumin and/or chitosan additives for food packaging have been previously obtained. The study examines the effect of the additives on the film’s morphological, mechanical, barrier, and migration properties. Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), water contact angle, thermogravimetric and differential thermal analysis (TGA and DTGA), differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), oxygen transmission rate (OTR), water vapor transmission rate (WVTR), and the overall and specific migration tests were conducted. The results show that the presence of chitosan significantly increased the overall migration and mechanical properties, such as the elongation at break, tensile strength, and Young’s modulus of most polyurethane formulations, while curcumin had a minor influence on the mechanical performance. Based on the results, formulations with curcumin but without chitosan are suitable for food packaging.

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“…Table 2 provides a summary of various migration experiments on plastic/paper-based FCMs [66][67][68][69][70][71][72][73][74][75][76]. The migration behavior of chemical substances in plastic/paper FCMs is determined by a variety of factors such as contact media, temperature, and time, resulting in varying levels of migration under different conditions, affecting the accuracy of final migration data and product compliance assessment [77][78][79][80]. Plastic/paper-based FCMs are usually tested using food simulants like water, ethanol, olive oil, acid, Tenax ® , and Porapak ® [66,[81][82][83][84].…”

Section: Migration Experimentsmentioning

confidence: 99%

Recent Advances in Non-Targeted Screening of Compounds in Plastic-Based/Paper-Based Food Contact Materials

Chen,

Li,

Huang

et al. 2023

Foods

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Ensuring the safety of food contact materials has become a pressing concern in recent times. However, detecting hazardous compounds in such materials can be a complex task, and traditional screening methods may not be sufficient. Non-targeted screening technologies can provide comprehensive information on all detectable compounds, thereby supporting the identification, detection, and risk assessment of food contact materials. Nonetheless, the non-targeted screening of food contact materials remains a challenging issue. This paper presents a detailed review of non-targeted screening technologies relying on high-resolution mass spectrometry for plastic-based and paper-based food contact materials over the past five years. Methods of extracting, separating, concentrating, and enriching compounds, as well as migration experiments related to non-targeted screening, are examined in detail. Furthermore, instruments and devices of high-resolution mass spectrometry used in non-targeted screening technologies for food contact materials are discussed and summarized. The research findings aim to provide a theoretical basis and practical reference for the risk management of food contact materials and the development of relevant regulations and standards.

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Effect of crystallinity on the migration of plastic additives from polylactic acid-based food contact plastics

Cited by 14 publications

References 56 publications

Preparation of Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide)/Zinc Oxide Nanocomposite Bioplastics for Potential Use as Flexible and Antibacterial Food Packaging

Preparation of Poly(L-lactide)-b-poly(ethylene glycol)-b-poly(L-lactide)/Zinc Oxide Nanocomposite Bioplastics for Potential Use as Flexible and Antibacterial Food Packaging

Obtention and Study of Polyurethane-Based Active Packaging with Curcumin and/or Chitosan Additives for Fruits and Vegetables—Part I: Analysis of Morphological, Mechanical, Barrier, and Migration Properties

Recent Advances in Non-Targeted Screening of Compounds in Plastic-Based/Paper-Based Food Contact Materials

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