Starch-based nanocomposites with cellulose nanofibers obtained from chemical and mechanical treatments.

International Journal of Biological Macromolecules
Heloisa TibollaRosiane Lopes Cunha

Abstract

Cellulose nanofibers (CNFs) were isolated from unripe banana peel by acid hydrolysis, with different acid concentrations (0.1%, 1.0% and 10% v/v), followed by mechanical treatment with high-pressure homogenizer. Banana starch-based films added with CNFs (0.2% w/w) as a reinforcing agent were produced by the casting method. The rheological behavior of aqueous dispersions of CNFs (1.0% w/w) and their effects on the properties of nanocomposite films were investigated. All aqueous dispersions of CNFs showed gel-like behavior and, when incorporated to the films, CNFs improved their water barrier properties and mechanical resistance as demonstrated by the increase in tensile strength and Young's modulus. Moreover, CNFs were well dispersed in the composite matrix. CNFs prepared at higher concentration, followed by mechanical treatment (FNM1 and FNM10), formed films with low moisture (13.66%) and solubility in water (24.1%). Whereas, CNFs prepared at the lowest acid concentration without mechanical treatment (FN0.1) led to films with high elongation at break (30.6%) and good tensile strength (12.3 MPa). Regardless of the used CNFs, all the nanocomposites displayed lower UV/light transmission than control film. The nanocomposite has pot...Continue Reading

References

Jun 27, 2002·Journal of Agricultural and Food Chemistry·Ramazan KizilKoushik Seetharaman
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Aug 4, 2009·Journal of Food Science·Henriette M C AzeredoTara H McHugh
Mar 31, 2015·Carbohydrate Polymers·Feng Jiang, You-Lo Hsieh
Apr 7, 2015·Carbohydrate Polymers·Margarita María Andrade-MahechaFlorencia Cecilia Menegalli
Dec 19, 2016·Carbohydrate Polymers·Anna Leticia Moron Pereira LeiteFlorencia Cecilia Menegalli
Jun 4, 2017·Journal of Colloid and Interface Science·Franciele Maria PelissariFlorencia Cecilia Menegalli

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Citations

Jan 28, 2022·Environmental Science and Pollution Research International·Amizon AzizanMuhammad Adlim

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