Hydrolysis of part of cassava starch into nanocrystals leads to increased reinforcement of nanocomposite films

Costa, Élia Karina de Carvalho; Souza, Carolina Oliveira de; Silva, Jania Betânia Alves da; Druzian, Janice Izabel

doi:10.1002/app.45311

Cited by 35 publications

(25 citation statements)

References 36 publications

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“…produced cassava starch films reinforced with CNCs from sweet potato residues and found higher solubility than the present study, with values ranging from 50% to 65%. The solubility found in the present study was also lower than the one found by Costa et al., who produced starch films reinforced with cassava nanocrystals and found water solubility values varying from 40% to 70%. In general, starch films present high solubility in water; however, this behavior can be modified by replacing part of their hydroxyl groups with new functional groups—in this case phosphate groups.…”

Section: Resultscontrasting

confidence: 86%

Biocomposite Films Based on Phosphorylated Wheat Starch and Cellulose Nanocrystals from Rice, Oat, and Eucalyptus Husks

et al. 2020

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There is a worldwide demand for environment‐friendly, biodegradable materials. The objective of this study is to develop biocomposite films using native or phosphorylated wheat starch reinforced with cellulose nanocrystals (CNCs) from three different sources, rice, oat, and eucalyptus husks. The films are evaluated by their morphology, thermal properties, relative crystallinity (RC), water vapor permeability (WVP), and mechanical properties. The high RC of the CNCs increases the RC of biocomposite films. The films produced using native and phosphorylated starches present higher WVP than those incorporated within CNCs. The films without CNCs also present low solubility, remain intact after 24 h of immersion in water under agitation, and resist water absorption. The CNCs incorporation increases the tensile strength of the films. Biocomposite films produced using native starch and oat CNCs yield the highest tensile strength (5.07 ± 0.33 MPa), showing a remarkable increase of 91.3% when compared to the film obtained using native starch (2.65 ± 0.09 MPa). The biocomposite films produced in this study show satisfactory mechanical properties, such as high resistance and flexibility, thereby presenting great potential for application in food industry.

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Section: Resultscontrasting

confidence: 86%

Biocomposite Films Based on Phosphorylated Wheat Starch and Cellulose Nanocrystals from Rice, Oat, and Eucalyptus Husks

et al. 2020

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“…Among the materials that have been widely studied for their application as bioplastic, starch has gained a significant attention . Its availability in the nature in the form of renewable and biodegradable resources, and its low cost make this a potential substitute for petroleum‐based plastics …”

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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“…Starch—another polymer of natural origin—is biodegradable, renewable, and a good applicant for the production of nanoparticles . Costa et al . added different concentrations of starch nanocrystals to cassava starch films and observed a linear increase of the tensile strength and a significant decrease of the water vapor permeability (WVP).…”

Section: Introductionmentioning

confidence: 99%

“…Starch-another polymer of natural origin-is biodegradable, renewable, and a good applicant for the production of nanoparticles. 5 Costa et al 25 added different concentrations of starch nanocrystals to cassava starch films and observed a linear increase of the tensile strength and a significant decrease of the water vapor permeability (WVP). The same behavior was verified by Xu et al 26 Acid hydrolysis is the most widely used method for dissolving the amorphous and paracrystalline regions of starch granules, generating nanocrystals 27 ; however, it is a problematic method for industrial applications owing to its negative environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Morphological, barrier, and mechanical properties of cassava starch films reinforced with cellulose and starch nanoparticles

Santana

Costa

Rodrigues

et al. 2018

J of Applied Polymer Sci

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A comparative performance study of cellulose and starch nanoparticles on plasticized starch reinforcement has been presented. Starch nanoparticles were obtained by ultrasound and acid hydrolysis, and cellulose nanoparticles were extracted by acid hydrolysis from microcrystalline cellulose and sisal fibers. The nanoparticles were characterized according to the zeta potential, the particle‐size distribution, transmission electron microscopy, X‐ray diffraction, and thermogravimetric analysis. The influence of the addition of these nanoparticles to starch films on the morphology, water vapor permeability (WVP), and mechanical properties of the nanocomposites films were investigated. The cellulose nanoparticles exhibited higher electrical stability than those originating from starch. Acid hydrolysis produced starch nanoparticles with higher crystallinity than ultrasound. All the nanoparticles significantly reduced the WVP. The cellulose nanoparticles significantly increased the tensile strength of the starch films; however, they reduced the flexibility of the nanocomposites. The results of this work support the application of starch and cellulose nanostructures for the development of reinforced biodegradable materials. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47001.

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Hydrolysis of part of cassava starch into nanocrystals leads to increased reinforcement of nanocomposite films

Cited by 35 publications

References 36 publications

Biocomposite Films Based on Phosphorylated Wheat Starch and Cellulose Nanocrystals from Rice, Oat, and Eucalyptus Husks

Biocomposite Films Based on Phosphorylated Wheat Starch and Cellulose Nanocrystals from Rice, Oat, and Eucalyptus Husks

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

Morphological, barrier, and mechanical properties of cassava starch films reinforced with cellulose and starch nanoparticles

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