Poly(lactic acid)/lignin films with enhanced toughness and anti-oxidation performance for active food packaging

Yang, Weijun; Weng, Yunxuan; Puglia, Debora; Qi, Guochuang; Dong, Weifu; Kenny, José María; Ma, Piming

doi:10.1016/j.ijbiomac.2019.12.085

Cited by 130 publications

(60 citation statements)

References 46 publications

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“…Although PVA has been widespread considered as a packaging material, its unsatisfactory UV shielding behaviour still needs to be enhanced to extend the application. The optical properties of all PVA nanocomposite films with various amounts of CNC and LNP are shown in Figure 7 b. CNC has weak UV resistance behaviour, while lignin has exhibited excellent UV resistance behaviour in some studies [ 6 , 33 ]. All PVA nanocomposite films remain highly transparent in visible spectrum regions (above 400 nm).…”

Section: Resultsmentioning

confidence: 99%

“…They are a balanced mixture of lignin, cellulose, hemicellulose and tannins, containing specific functionalities that permit their conversion, as alternative materials to fossil fuels, to biofuels and other organic compounds [ 1 , 2 ]. Lignocellulosic materials have found many applications as reactive filler in various polymers, including thermoplastics, such as polyethylene [ 3 , 4 ], poly (lactic acid) [ 5 , 6 , 7 ], poly (methyl methacrylate) [ 8 , 9 ], polyurethane [ 10 , 11 , 12 ] etc.) and thermosetting matrices, such as phenolic [ 13 , 14 ] and epoxy resins [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Yang

Kenny

et al. 2020

Polymers

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In this work, PVA nanocomposite films containing cellulose nanocrystals (CNC) and different amounts of lignin nanoparticles (LNP), prepared via a facile solvent cast method, were crosslinked by adding glutaraldehyde (GD). The primary objective was to investigate the effects of crosslinker and bio-based nanofillers loading on thermal, mechanical, antioxidant and water barrier behaviour of PVA nanocomposite films for active food packaging. Thermogravimetric analysis showed improved thermal stability, due to the strong interactions between LNP, CNC and PVA in the presence of GD, while Wide-angle X-ray diffraction results confirmed a negative effect on crystallinity, due to enhanced crosslinking interactions between the nanofillers and PVA matrix. Meanwhile, the tensile strength of PVA-2CNC-1LNP increased from 26 for neat PVA to 35.4 MPa, without sacrificing the ductility, which could be explained by a sacrificial hydrogen bond reinforcing mechanism induced by spherical-like LNP. UV irradiation shielding effect was detected for LNP containing PVA films, also migrating ingredients from PVA nanocomposite films induced radical scavenging activity (RSA) in the produced films in presence of LNP. Furthermore, PVA-CNC-LNP films crosslinked by GD showed marked barrier ability to water vapour.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Yang

Kenny

et al. 2020

Polymers

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“…The above spectra reveal that YMNs produce a strong UV blocking effect in the recycled PLA matrix. Other authors have already reported the UV blocking effect in virgin PLA reinforced with different lignocellulosic nanoparticles, such as in PLA/lignin nanoparticles bionanocomposites [ 31 , 57 ]; PLA/cellulose nanocrystals nanocomposites [ 51 ] and also in virgin PLA reinforced with 5 wt. % of similar yerba-mate-based lignocellulosic nanoparticles [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

et al. 2020

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In this work, yerba mate nanoparticles (YMNs) were extracted from Ilex paraguairiencis yerba mate wastes and further used to improve the overall performance of mechanically recycled PLA (PLAR). Recycled PLA was obtained by melt reprocessing PLA subjected to an accelerated ageing process, which involved photochemical, thermal and hydrothermal ageing steps, as well as a final demanding washing step. YMNs (1 and 3 wt. %) were added to the PLAR during the melt reprocessing step and further processed into films. The main goal of the development of PLAR-YMNs bionanocomposites was to increase the barrier properties of recycled PLA, while showing good overall performance for food packaging applications. Thus, optical, structural, thermal, mechanical and barrier properties were evaluated. The incorporation of YMNs led to transparent greenish PLAR-based films with an effective blockage of harmful UV radiation. From the backbone FTIR stretching region (bands at 955 and 920 cm−1), it seems that YMNs favor the formation of crystalline domains acting as nucleating agents for PLAR. The morphological investigations revealed the good dispersion of YMNs in PLAR when they are used in the lowest amount of 1 wt. %, leading to bionanocomposites with improved mechanical performance. Although the addition of high hydrophilic YMNs increased the water vapor transmission, the addition of 1 wt. % of YMNs enhanced the oxygen barrier performance of the produced bionanocomposite films. These results show that the synergistic revalorization of post-consumer PLA and nanoparticles obtained from agri-food waste is a potential way for the production of promising packaging materials that meet with the principles of the circular economy.

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“…In general, PLA toughening modification methods can be divided into chemical and physical methods 17 . Chemical methods are expensive, operationally complex, and difficult to adapt to industrial‐scale production 18,19 . By contrast, physical methods are relatively simple and inexpensive 20,21 …”

Section: Introductionmentioning

confidence: 99%

Synergistic reinforcing of poly(lactic acid) by poly(butylene adipate‐co‐terephthalate) and alumina nanoparticles

Chen

Hu²,

Jin

et al. 2020

J of Applied Polymer Sci

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Biodegradable poly(lactic acid) (PLA)/poly(butylene adipate‐co‐terephthalate) (PBAT) blends and PLA/PBAT/Al2O3 nanocomposites were fabricated via solution blending. The influence of PBAT and Al2O3 content on the thermal stability, flexural properties, impact strength, and morphology of both the PLA/PBAT blends and the PLA/PBAT/Al2O3 nanocomposites were investigated. The impact strength of the PLA/PBAT/Al2O3 nanocomposites containing 5 wt% PBAT increased from 4.3 to 5.2 kJ/m2 when the Al2O3 content increased from 0 to 1 wt%. This represents a 62% increase compared to the impact strength of pristine PLA and a 20% increase compared to the impact strength of PLA/PBAT blends containing 5 wt% PBAT. Scanning electron microscopy imaging revealed that the Al2O3 nanoparticles in the PLA/PBAT/Al2O3 nanocomposites function as a compatibilizer to improve the interfacial interaction between the PBAT and the PLA matrix.

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Poly(lactic acid)/lignin films with enhanced toughness and anti-oxidation performance for active food packaging

Cited by 130 publications

References 46 publications

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Effect of Cellulose Nanocrystals and Lignin Nanoparticles on Mechanical, Antioxidant and Water Vapour Barrier Properties of Glutaraldehyde Crosslinked PVA Films

Effect of Iignocellulosic Nanoparticles Extracted from Yerba Mate (Ilex paraguariensis) on the Structural, Thermal, Optical and Barrier Properties of Mechanically Recycled Poly(lactic acid)

Synergistic reinforcing of poly(lactic acid) by poly(butylene adipate‐co‐terephthalate) and alumina nanoparticles

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