Morphology, thermal and barrier properties of biodegradable films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) containing cellulose nanocrystals

Malmir, Sara; Montero, Belén; Rico, Maite; Barral, L.; Bouza, Rebeca

doi:10.1016/j.compositesa.2016.11.011

Cited by 90 publications

(56 citation statements)

References 31 publications

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“…Figure gives WAXS evolution with temperature meanwhile the samples were subjected to cooling scan. WAXS pattern for CNC was presented in our previous work where it was shown that CNC did not have any effect on the shape and location of the peaks in the WAXS pattern of PHBV . WAXS diffractograms of both PHBV and PHBV/CNC6 samples at room temperature contains the main characteristics diffraction peaks of orthorhombic α– type crystalline structure .…”

Section: Resultsmentioning

confidence: 93%

PHBV/CNC bionanocomposites processed by extrusion: Structural characterization and properties

et al. 2017

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Bionanocomposites of poly(3-hydroxybutyrate-co-3hydroxyvalerate) (PHBV) with cellulose nanocrystals (CNC) were processed by extrusion. Differential scanning calorimetry (DSC) showed that with increasing the amount of CNC the overall crystallization time was reduced. Wide angle X -ray scattering (WAXS) showed diffraction peaks of orthorhombic a-type crystalline structure and confirmed the nucleating agent effect of CNC particles in the PHBV matrix. Small angle X-ray scattering (SAXS) showed that the reducing rate of long spacing was slower in the filled sample than in PHBV. Microscopy images (Scanning Electron Microscopy, SEM, and Transmission Electron Microscopy, TEM) revealed well-dispersed morphology in low loading of the filler while slight agglomerations appeared at higher filler concentration. Statistical analysis was done by applying a one-way ANOVA (a 5 0.05) to evaluate the effect of filler on mechanical properties of PHBV. Water vapor, oxygen and carbon dioxide transmission rate showed that the incorporation of CNC nanocrystals led to an improvement in the barrier properties of the bionanocomposites due to higher crystallinity and more tortuosity in their morphologies. POLYM. COMPOS., 00:000-000, 2017.

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Section: Resultsmentioning

confidence: 93%

PHBV/CNC bionanocomposites processed by extrusion: Structural characterization and properties

et al. 2017

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“…According to Malmir et al, CNW, through the hydroxyl groups that are present on its surface, is able to form hydrogen bonds with other molecules. Once located at the interface between different polymers, they interact electrostatically with functional groups that contain more electronegative atoms, like nitrogen atoms or oxygen of other molecules, which allows the compatibilization between the phases.…”

Section: Introductionmentioning

confidence: 99%

PBAT/TPS‐nanowhiskers blends preparation and application as food packaging

Silva

Santana

Lucas

et al. 2019

J of Applied Polymer Sci

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About 85–90% of the market for new materials in biodegradable packaging is served by various blends and composites containing starch in some portion. In an attempt to satisfy the increasing consumer demand, innovative materials are being developed. This includes the concept of active packaging, which, in addition to protecting, interacts with the packaged product. In this context, flexible films have been prepared from blends of poly(butylene adipate‐co‐terephthalate), thermoplastic starch (TPS), and cellulose nanowhiskers (CNW) at different concentrations (0–3.0 wt %) and with distinct compatibilizing agents (glycerol, stearic acid, and citric acid) by flat extrusion. Palm oil was packaged in the films, and was stored under accelerated oxidation conditions as a model system. The films were also used for packing lettuce. The TPS increased the rate of water vapor permeability of the blends. The micrographs showed the films with very porous surface as a function of the CNW concentration. In addition to the antimicrobial action pronounced within 10 days (fungi—molds and yeasts; bacteria—mesophilic and psychrotrophic), the film showed a prooxidant action, indicating its suitability for fruit and vegetable packaging. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47699.

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“…Shelf life plays an important role in determining the quality of film, and it depends mainly on the humidity and gas permeability through the film. A humid atmosphere with the presence of oxygen favors microbial growth and gradually spoils the quality of food inside (Malmir et al, 2017;Nair et al, 2017). Moreover, the reduced transmission rate favors increasing the degradation rate, since it depends on the transport of water from the surface to the bulk of the material (Park et al, 2003).…”

Section: Renewable Polymers Offer An Attractivementioning

confidence: 99%

Mechanical and Permeability Properties of Thermoplastic Starch Composites Reinforced with Cellulose Nanofiber for Packaging Applications

Balakrishnan

Gopi

Geethamma

et al. 2019

Journal of Siberian Federal University. Biology

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In this study, a facile, ecofriendly nanocomposite based on glycerol-plasticized thermoplastic potato starch (TPS) containing 0-4 wt.% cellulose nanofiber (CNF) from pineapple leaf was prepared by the solution casting technique. The nanocomposite films showed better mechanical properties compared to neat film. The tensile properties were fit with theoretical predictions. Tensile strength increased with CNF loading and reached up to 4.682 MPa (TPS+3 wt.% CNF) from 1.58 MPa (neat TPS), an improvement of ~196% over the neat polymer. The addition of cellulose nanofiber improved the barrier properties of films by creating a tortuous path for penetrant molecules. Gas transport behavior of CNF-based TPS nanocomposite films was explored using O2 gas. A 56% decrease (relative to neat TPS) in oxygen permeability of the nanocomposite membranes was achieved by adding only 3 wt.% CNF. The oxygen permeability data were fit with two theoretical models

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Morphology, thermal and barrier properties of biodegradable films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) containing cellulose nanocrystals

Cited by 90 publications

References 31 publications

PHBV/CNC bionanocomposites processed by extrusion: Structural characterization and properties

PHBV/CNC bionanocomposites processed by extrusion: Structural characterization and properties

PBAT/TPS‐nanowhiskers blends preparation and application as food packaging

Mechanical and Permeability Properties of Thermoplastic Starch Composites Reinforced with Cellulose Nanofiber for Packaging Applications

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