Plasticization of poly(lactide) by sorption of volatile organic compounds at low concentration

Salazar, Rómulo; Domenek, Sandra; Courgneau, Cécile; Ducruet, Violette

doi:10.1016/j.polymdegradstab.2012.03.047

Cited by 27 publications

(30 citation statements)

References 39 publications

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“…Indeed, a decrease of the T g of PLA due to the introduction of the natural antioxidant resveratrol was also observed by Hwang et al [45] and explained by plasticizing. Moreover, aromatic molecules such as benzaldehyde have already shown their ability to decrease the T g of PLA [53]. The low molecular weight fraction of lignin has therefore probably a plasticizing effect.…”

Section: Composite Materials Characteristicsmentioning

confidence: 99%

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract Due to their polyphenolic structure lignins bear a number of interesting functional properties, such as antioxidant activity. Natural antioxidants are very much looked for in the aim of protection of light or oxygen sensitive goods and are being used in active packaging. Poly(lactide) (PLA)-lignin films were prepared by twin screw extrusion followed by thermo-compression using two different commercial sources of alkali lignins obtained from gramineous plants. A good dispersion of lignin in the matrix was observed. Mechanical properties of the compounded material were merely diminished and oxygen barrier properties slightly enhanced. The chromatographic study of the lignins revealed that the low molecular weight fraction of both lignins increased during the polymer processing. The migration of low molecular weight compounds in an ethanol/water solution simulating fatty foodstuff was performed and the antioxidant activity of the extract was analysed. It was found that the activity increases with increasing severity of the heat treatment because of the generation of free phenolic monomers during processing. These results open an interesting way for application of lignins as an active compound in packaging materials. Lignins do not impair the mechanical and barrier performance of the polymer and the plastics processing even allows for the generation of active substances.

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Section: Composite Materials Characteristicsmentioning

confidence: 99%

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

et al. 2013

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“…The limonene diffusion through packaging has been widely studied in different food contact materials such as polyethylene (PE) [13], low density polyethylene (LDPE) [14], high density polyethylene (HDPE), polystyrene (PS) [15] and PLA [15,16]. Furthermore, the sorption of aroma compounds through packaging materials have been reported recently by Salazar et al, (2012) [17], who found a plasticization effect of PLA films by aroma compounds after the sorption studies.…”

Section: Introductionmentioning

confidence: 99%

Characterization of PLA-limonene blends for food packaging applications

Arrieta¹,

López²,

Bou³

et al. 2013

Polymer Testing

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Polymers derived from renewable resources are now considered as promising alternatives to traditional petro-polymers as they mitigate current environmental concerns (raw renewable materials/biodegradability). d-limonene can be found in a variety of citrus, indeed is the main component of citrus oils and one of most important contributors to citrus flavor. The incorporation of limonene in PLA matrix was evaluated and quantified by Pyrolysis Gas Chromatography Mass Spectrometry (Py-GC/MS). Transparent films were obtained after the addition of the natural compound. Mechanical properties were evaluated by tensile tests. The effect of limonene on mechanical properties of PLA films was characterized by an increase in the elongation at break and a decrease in the elastic modulus. The fracture surface structure of films was evaluated by scanning electron microscopy (SEM), and homogeneous surfaces were observed in all cases. Barrier properties were reduced due to the increase of the chain mobility produced by the d-limonene.

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“…As majority of existing commercial applications are for food packaging, studies have mainly been focused on the barrier properties of food solutions related to the quality of the packaged product . Recent reports on the interaction between PLA packaging and its product constituents have revealed changes in the thermomechanical properties after the sorption of a hydrophilic chemical compound into the package . This finding highlighted sorption‐induced plasticization in PLA packaging during its interaction with a particular substance of a packaged product.…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of poly(lactic acid)‐based packaging under liquid exposure

Widiastuti

Sbarski

Masood

2014

J of Applied Polymer Sci

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The objective of this study was to examine the mechanical behavior of poly(lactic acid)-based packaging, which was subjected to an external load while undergoing dimensional and material property changes due to the diffusion of liquid through its thickness. We defined the characteristics of the material response by taking into account the changes in the properties due to liquid sorption. The material properties at any given location and time were dependent on the liquid content. In this article, we present the evolution of the mechanical behavior using a numerical stress model that accounts for the effects of the time, liquid content, temperature, and swelling-induced strain. We assumed that the deformation depended on the liquid concentration, but the liquid concentration could be obtained without the knowledge of the stress or strain.

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Plasticization of poly(lactide) by sorption of volatile organic compounds at low concentration

Cited by 27 publications

References 39 publications

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Characterization of PLA-limonene blends for food packaging applications

Mechanical response of poly(lactic acid)‐based packaging under liquid exposure

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