Degradation kinetics study of Poly lactic acid(PLA) based biodegradable green composites

Bhiogade, Achal; Kannan, Murugasamy; Devanathan, Sriram

doi:10.1016/j.matpr.2020.04.389

Cited by 14 publications

(10 citation statements)

References 6 publications

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“…These lower degradation temperatures may be attributed to the decrease of molecular weight of PLA and sometimes to the low of affinity between the fibers/matrix [22], [23], [24].…”

Section: Thermal Propertiesmentioning

confidence: 99%

“…the O-C asymmetric mode of the ester groups was observed at 1088 cm -1 , and the peaks appeared at 957 and 913 cm -1 were attributed to the rocking mode of CH 3 . Also the peaks at 864 and 753 cm -1 , can be referred to the amorphous and crystalline phases of the PLA, respectively [2], [24].…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…After 9 months the they were already in pieces such that only a few parts could be handled. We can say that the necessary period for total degradtion of PLA by soil burial is estimated at 10 months [24], [39].…”

Section: Biodegradabilitymentioning

confidence: 99%

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Green composites based on Atriplex halimus fibers and PLA matrix

Boudjema

Bendaikha

Maschke

2020

Journal of Polymer Engineering

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This work focuses on the potential use of cellulose fibers extracted from Mediterranean saltbush (Atriplex halimus) as a filler in the polymeric matrix. The fully biodegradable composites were prepared from polylactic acid (PLA) as matrix and microcellulose fibers ranging from 0 to 15 wt.%. The influence of the fiber content on the structure, mechanical, thermal, and water absorption properties was evaluated. Mechanical results indicated that fibers acted effectively as reinforcement, increasing the tensile strength and the Young’s modulus of PLA by 25 and 45%, respectively. This is due to the good stress transfer between fibers and matrix through the strong interactions that have been evidenced by Fourier Transform Infrared (FTIR) spectroscopy. The thermogravimetric analysis showed that PLA composites have a slightly lower degradation temperature than the pure PLA, but they still have favorable thermal stability. Water absorption measurements and biodegradability tests showed that the addition of fibers accelerates degradation kinetics and confirm that the prepared composites are an environmentally safe material suited for different applications.

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“…These lower degradation temperatures may be attributed to the decrease of molecular weight of PLA and sometimes to the low of affinity between the fibers/matrix [22], [23], [24].…”

Section: Thermal Propertiesmentioning

confidence: 99%

Section: Ft-ir Analysismentioning

confidence: 99%

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Green composites based on Atriplex halimus fibers and PLA matrix

Boudjema

Bendaikha

Maschke

2020

Journal of Polymer Engineering

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“…One of the promising polymers for developing such kinds of packages is poly(lactic acid)(PLA). PLA is a biodegradable polymer derived from renewable sources, mainly starch and sugar, and has been used in many industrial applications due to its high hardness, modulus of elasticity and transparency (Arrieta, López, Ferrándiz, & Peltzer, 2013;Bhiogade, Kannan, & Devanathan, 2020;Guinault, Sollogoub, Domenek, Grandmontagne, & Ducruet, 2010;Jamshidian, Tehrany, & Desobry, 2013). On the other hand, for its application in food packages, it is necessary to modify some of its properties, mainly as regards its fragility attributed to its glass transition and hardness, and its high hydrolysis rate and low O2 and CO2 barrier properties (Armentano et al, 2013;Correa-Pacheco et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Este trabajo se centró en el desarrollo de envases activos biodegradables con mezclas de poli (ácido láctico) (PLA), poli (etileno-co-acetato de vinilo) (EVA), polietilenglicol (PEG) y quitosano (QUI). Se investigaron las características morfológicas térmicas y mecánicas de las mezclas, así como, al mismo tiempo, la actividad antifúngica del envase. Para evaluar la actividad antimicrobiana de las mezclas PLA/EVA/PEG/QUI, las muestras se insertaron entre rebanadas de pan sin conservantes para evaluar su vid

Cavalli

Klein

Sandri

et al. 2021

RSD

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This work focused on the development of biodegradable active packaging with poly(lactic acid) (PLA), poly(ethylene-co-vinyl acetate) (EVA), polyethylene glycol (PEG) and chitosan (QUI) blends. It investigated thermal and mechanical morphological characteristics of the blends, as the same time, the antifungal activity of the packaging. To assess the antimicrobial activity of the PLA/EVA/PEG/QUI blends, the samples were inserted between slices of bread with no preservative to the evaluation of their shelf life. By comparing between PLA/EVA/PEG, PLA/EVA/PEG/QUI blends and neat PLA was possible to evidence the partial miscibility, decreased glass transition temperature (Tg) by incorporating PEG into the blends, a decrease in ﬂexural strength of 71% and elasticity modulus of 80.4% to PLA/EVA/PEG/2.5QUI blend, as well as an increase in elongation at break of 153% and 392% to impact toughness. A similar behavior was observed to PLA/EVA/20PEG and PLA/EVA/PEG/5.0QUI. The QUI-containing ﬁlm among the bread slices has also inﬂuenced the water activity reduction, and reduced about 35% in the count of molds and yeasts in the slices of bread. Chitosan in mixtures with PLA/EVA/PEG showed potential as a natural antifungal agent in bakery packaging.

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“…Thermogravimetric analysis (TGA) and rheological analysis can monitor the thermal degradation of PLA in real time. [ 16,17 ] These two methods have served as the main approaches to perform thermal degradation kinetic analysis. Aoyagi et al [ 18 ] conducted TGA at multiple heating rates to perform kinetic analysis of the process and proposed the degradation mechanisms of PLA during pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation kinetics study of molten polylactide based on Raman spectroscopy

Lin

Guo

et al. 2020

Polymer Engineering & Sci

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The thermal degradation of polylactide (PLA) during melt processing may lead to poor product properties. In this study, a unique Raman system was applied to explore the thermal degradation kinetics of molten PLA under five different temperatures and three atmospheres. It was found that the intensity of specific Raman bands correlated with the concentration of functional groups in the PLA during the degradation process. Kinetic models for thermal degradation were established based on the intensity of the characteristic band of C‐COO. Kinetic parameters determined by kinetic models quantitatively revealed the effect of temperature and atmosphere on thermal degradation. Furthermore, time sweep rheological tests using the same degradation conditions were performed for verification, and the results corroborated the spectral analyses. This investigation demonstrates the feasibility of Raman spectroscopy for thermal degradation kinetic analysis.

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Degradation kinetics study of Poly lactic acid(PLA) based biodegradable green composites

Cited by 14 publications

References 6 publications

Green composites based on Atriplex halimus fibers and PLA matrix

Green composites based on Atriplex halimus fibers and PLA matrix

Thermal degradation kinetics study of molten polylactide based on Raman spectroscopy

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