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Cammarata MDM, Contin MD, Negri RM, Factorovich MH. Diffusion Coefficients of Variable-Size Amphiphilic Additives in a Glass-Forming Polyethylene Matrix. J Phys Chem B 2024; 128:312-328. [PMID: 38146058 DOI: 10.1021/acs.jpcb.3c04904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Diffusion of additives in polymers is an important issue in the plastics industry since migratory-type molecules are widely used to tune the properties of polymeric composites. Predicting the diffusional behavior of new additives can minimize the need for repetitive experiments. This work presents molecular dynamics simulations at the microsecond time scale and uses the MARTINI force field to estimate self-diffusion coefficients, D, of six monounsaturated amides and their analogs carboxylic acids in polyethylene matrices (PE, MW = 5600 Da). The results are strongly influenced by the glass-forming properties of the PE matrix, which we characterize by three distinct temperatures. The metastability region (T < 325 K), the glass transition temperature (Tg = 256-260 K), and the end of the transition (T ≅ 200 K). Self-diffusion mechanisms are inferred from the results of the dependence of D on the molecular mass of the additive, observing a Rouse-like behavior at high temperatures and deviations from it within the metastability region of the matrix. Interestingly, D values are nonsensitive to the nature of the considered polar head for additives of similar size. The temperature-dependent behavior of D follows, at fixed additive size, a linear Arrhenius pattern at high temperatures and a super Arrhenius trend at lower temperatures, which is well represented with a power law equation as predicted by the Mode Coupling Theory (MCT). We offer a conceptual explanation for the observed super-Arrhenius behavior. This explanation draws on Truhlar and Kohen's interpretation of the available energies at both the initial and the transition states along the diffusion pathway. The matrix's mobility significantly affects solute self-diffusion, yielding equal activation enthalpies for the Arrhenius region or the same power law parameters for the super-Arrhenius regime. Finally, we establish a one-to-one time-equivalence of the self-diffusion processes between CG and all-atom systems for the largest additives and the PE matrix in the high-temperature regime.
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Affiliation(s)
- María Del Mar Cammarata
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
| | - Mario D Contin
- Departamento de Ciencias Química, Catedra de Química Analítica. Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, Buenos Aires C1113AAD, Argentina
| | - R Martín Negri
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
| | - Matias H Factorovich
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires C1428EHA, Argentina
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Dziadowiec D, Matykiewicz D, Szostak M, Andrzejewski J. Overview of the Cast Polyolefin Film Extrusion Technology for Multi-Layer Packaging Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1071. [PMID: 36770077 PMCID: PMC9920539 DOI: 10.3390/ma16031071] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/12/2023] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
The review article presents the technology of producing polyolefin-based films by extrusion casting. Due to the wide use of this type of film as packaging for food and other goods, obtaining films with favorable properties is still a challenge for many groups of producers in the plastics market. The feedblock process and multimanifold process are the main methods of producing multi-layer film. In the case of food films, appropriate barrier properties are required, as well as durability and puncture resistance also at low temperatures. On the other hand, in order to properly pack and present products, an appropriate degree of transparency must be maintained. Therefore, processing aids such as anti-slip, anti-block and release agents are commonly used. Other popular modifiers, such as waxes, fatty acid amides and mineral fillers-silica, talc or calcium carbonate-and their use in film extrusion are discussed. The article also presents common production problems and their prevention.
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Affiliation(s)
- Damian Dziadowiec
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
- Eurocast Sp. z o.o., Wejherowska 9, 84-220 Strzebielino, Poland
| | - Danuta Matykiewicz
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
| | - Marek Szostak
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
| | - Jacek Andrzejewski
- Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
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Grob K. How to make the use of recycled paperboard fit for food contact? A contribution to the discussion. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 39:198-213. [PMID: 34525320 DOI: 10.1080/19440049.2021.1977853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Recycled paperboard contains hundreds of non-evaluated or even unidentified substances that could endanger human health if they turn out to be highly toxic. It seems as unrealistic to evaluate each of them as it is to phase out the use of the problematic ones or sort out the papers and boards introducing them into the recyclate. Therefore, measures should be taken that generally reduce migration into food, such as functional barriers or functional sorbents. A general approach is used for the recycling of plastics, particularly poly(ethylene terephthalate), PET: as not every potential contaminant can be regulated, a pragmatic approach is applied, for PET mainly on the required decontamination efficiency. Criteria are required on the required efficacy of the measures to be taken. Recycled paperboard is used for various types of food contact: mostly contact is through the gas phase (evaporation and recondensation), often indirect through other layers (e.g. internal bags or for transport boxes), seldom in wetting contact. Numerous factors have to be considered. For typical folding boxes and at least strongly dominating gas phase contact, it was proposed that no more than 1% of each contaminant in the recycled paperboard should enter the food. The efficiency of the measures required to comply with this criterion depends on the application. The three main measures are reviewed with regard to this criterion: (i) internal bags with an incorporated functional barrier (successfully used for some time), (ii) a barrier layer on the internal wall of the box (for which the design of the closures might be most critical) and (iii) functional sorbents added to the paperboard (for which the sorbent capacity is critical). For transport boxes, commonly of corrugated board (quantitatively the most important use of recycled paperboard in food contact), an adjusted or different criterion is needed.
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Affiliation(s)
- Koni Grob
- Retired from Kantonales Labor Zürich (Official Food Control Authority of the Canton of Zurich), Zurich, Switzerland
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Fengler R, Gruber L. Migration and permeation of mineral oil components from paper-based food contact materials into foods – A critical comparison of analytical methods. Food Packag Shelf Life 2020. [DOI: 10.1016/j.fpsl.2020.100537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Samsudin H, Auras R, Mishra D, Dolan K, Burgess G, Rubino M, Selke S, Soto-Valdez H. Migration of antioxidants from polylactic acid films: A parameter estimation approach and an overview of the current mass transfer models. Food Res Int 2018; 103:515-528. [DOI: 10.1016/j.foodres.2017.09.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 09/04/2017] [Accepted: 09/08/2017] [Indexed: 02/06/2023]
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Fang X, Vitrac O. Predicting diffusion coefficients of chemicals in and through packaging materials. Crit Rev Food Sci Nutr 2017; 57:275-312. [PMID: 25831407 DOI: 10.1080/10408398.2013.849654] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Most of the physicochemical properties in polymers such as activity and partition coefficients, diffusion coefficients, and their activation with temperature are accessible to direct calculations from first principles. Such predictions are particularly relevant for food packaging as they can be used (1) to demonstrate the compliance or safety of numerous polymer materials and of their constitutive substances (e.g. additives, residues…), when they are used: as containers, coatings, sealants, gaskets, printing inks, etc. (2) or to predict the indirect contamination of food by pollutants (e.g. from recycled polymers, storage ambiance…) (3) or to assess the plasticization of materials in contact by food constituents (e.g. fat matter, aroma…). This review article summarizes the classical and last mechanistic descriptions of diffusion in polymers and discusses the reliability of semi-empirical approaches used for compliance testing both in EU and US. It is concluded that simulation of diffusion in or through polymers is not limited to worst-case assumptions but could also be applied to real cases for risk assessment, designing packaging with low leaching risk or to synthesize plastic additives with low diffusion rates.
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Affiliation(s)
- Xiaoyi Fang
- a AgroParisTech, UMR 1145 Ingénierie Procédés Aliments , Massy , France.,b INRA, UMR 1145 Ingénierie Procédés Aliments , Massy , France
| | - Olivier Vitrac
- a AgroParisTech, UMR 1145 Ingénierie Procédés Aliments , Massy , France.,b INRA, UMR 1145 Ingénierie Procédés Aliments , Massy , France
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Biedermann-Brem S, Biedermann M, Grob K. Required barrier efficiency of internal bags against the migration from recycled paperboard packaging into food: a benchmark. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2016; 33:725-40. [PMID: 26936619 DOI: 10.1080/19440049.2016.1160744] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The use of recycled paperboard and corrugated board for food packaging is in the interest of the sustainability of resources, but in most applications the food must be protected against contamination from these materials, such as by an internal bag with a functional barrier. Producers of packaging need a specification to find the most suitable and economical barrier for a given application, and the customer needs the confidence that a solution offered to him is adequate. An accurate determination of the barrier efficiency is not possible due to the large number of migrants, most of which have not been evaluated or not even identified. Hence the specification must be based on assumptions and verifiable by a simple test. The proposed benchmark presumes that the migration of all non-evaluated or even unknown substances in recycled paperboard will remain below 0.01 mg kg(-1) food, the conventional detection limit, if their transfer does not exceed 1% of the content in the paperboard. Some substances, such as mineral oil or fatty acids, will exceed the 0.01 mg kg(-1) limit, but they are known, evaluated and of no concern at the reduced migration. Since the critical substances must be assumed to be unknown, the criterion of the 1% migration is tested with three surrogate substances of similar volatility and covering a broad range of polarity. The cornerstones of the method are specified.
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Affiliation(s)
- Sandra Biedermann-Brem
- a Kantonales Labor Zürich (Official Food Control Authority of the Canton of Zurich) , Zurich , Switzerland
| | - Maurus Biedermann
- a Kantonales Labor Zürich (Official Food Control Authority of the Canton of Zurich) , Zurich , Switzerland
| | - Koni Grob
- a Kantonales Labor Zürich (Official Food Control Authority of the Canton of Zurich) , Zurich , Switzerland
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Palkopoulou S, Joly C, Feigenbaum A, Papaspyrides CD, Dole P. Critical review on challenge tests to demonstrate decontamination of polyolefins intended for food contact applications. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2015.12.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hatzigrigoriou NB, Vouyiouka SN, Joly C, Dole P, Papaspyrides CD. Temperature-humidity superposition in diffusion phenomena through polyamidic materials. J Appl Polym Sci 2012. [DOI: 10.1002/app.36279] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Barlow S. Risk assessment of food-contact materials: past experience and future challenges. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2009; 26:1526-33. [DOI: 10.1080/02652030903233231] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Salafranca J, Pezo D, Nerín C. Assessment of specific migration to aqueous simulants of a new active food packaging containing essential oils by means of an automatic multiple dynamic hollow fibre liquid phase microextraction system. J Chromatogr A 2009; 1216:3731-9. [DOI: 10.1016/j.chroma.2009.03.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Revised: 01/19/2009] [Accepted: 03/03/2009] [Indexed: 10/21/2022]
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Poças MF, Oliveira JC, Oliveira FAR, Hogg T. A Critical Survey of Predictive Mathematical Models for Migration from Packaging. Crit Rev Food Sci Nutr 2008; 48:913-28. [DOI: 10.1080/10408390701761944] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Franz R, Welle F. Migration measurement and modelling from poly(ethylene terephthalate) (PET) into soft drinks and fruit juices in comparison with food simulants. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2008; 25:1033-46. [DOI: 10.1080/02652030701837381] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Welle F, Franz R. SiOxlayer as functional barrier in polyethylene terephthalate (PET) bottles against potential contaminants from post-consumer recycled PET. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2008; 25:788-94. [DOI: 10.1080/02652030701704755] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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