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Nanocellulose reinforced chitosan composite films as affected by nanofiller loading and plasticizer content.
J Food Sci. 2010 Jan-Feb; 75(1):N1-7.JF

Abstract

Chitosan is a biopolymer obtained by N-deacetylation of chitin, produced from shellfish waste, which may be employed to elaborate edible films or coatings to enhance shelf life of food products. This study was conducted to evaluate the effect of different concentrations of nanofiller (cellulose nanofibers, CNF) and plasticizer (glycerol) on tensile properties (tensile strength-TS, elongation at break-EB, and Young's modulus-YM), water vapor permeability (WVP), and glass transition temperature (T(g)) of chitosan edible films, and to establish a formulation to optimize their properties. The experiment was conducted according to a central composite design, with 2 variables: CNF (0 to 20 g/100 g) and glycerol (0 to 30 g/100 g) concentrations in the film (on a dry basis), which was produced by the so-called casting technique. Most responses (except by EB) were favored by high CNF concentrations and low glycerol contents. The optimization was based on maximizing TS, YM, and T(g), and decreasing WVP, while maintaining a minimum acceptable EB of 10%. The optimum conditions were defined as: glycerol concentration, 18 g/100 g; and CNF concentration, 15 g/100 g. AFM imaging of films suggested good dispersion of the CNF and good CNF-matrix interactions, which explains the good performance of the nanocomposite films.

PRACTICAL APPLICATION

Chitosan is a biodegradable polymer which may be used to elaborate edible films or coatings to enhance shelf life of foods. This study demonstrates how cellulose nanofibers (CNF) can improve the mechanical and water vapor barrier properties of chitosan films. A nanocomposite film with 15% CNF and plasticized with 18% glycerol was comparable to some synthetic polymers in terms of strength and stiffness, but with poorer elongation and water vapor barrier, indicating that they can be used for applications that do not require high flexibility and/or water vapor barrier. The more important advantage of such films when compared to synthetic polymer films is their environmentally friendly properties.

Authors+Show Affiliations

EMBRAPA Tropical Agroindustry, R. Dra. Sara Mesquita, Fortaleza/CE, Brazil. ette@cnpat.embrapa.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20492188

Citation

Azeredo, Henriette M C., et al. "Nanocellulose Reinforced Chitosan Composite Films as Affected By Nanofiller Loading and Plasticizer Content." Journal of Food Science, vol. 75, no. 1, 2010, pp. N1-7.
Azeredo HM, Mattoso LH, Avena-Bustillos RJ, et al. Nanocellulose reinforced chitosan composite films as affected by nanofiller loading and plasticizer content. J Food Sci. 2010;75(1):N1-7.
Azeredo, H. M., Mattoso, L. H., Avena-Bustillos, R. J., Filho, G. C., Munford, M. L., Wood, D., & McHugh, T. H. (2010). Nanocellulose reinforced chitosan composite films as affected by nanofiller loading and plasticizer content. Journal of Food Science, 75(1), N1-7. https://doi.org/10.1111/j.1750-3841.2009.01386.x
Azeredo HM, et al. Nanocellulose Reinforced Chitosan Composite Films as Affected By Nanofiller Loading and Plasticizer Content. J Food Sci. 2010 Jan-Feb;75(1):N1-7. PubMed PMID: 20492188.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanocellulose reinforced chitosan composite films as affected by nanofiller loading and plasticizer content. AU - Azeredo,Henriette M C, AU - Mattoso,Luiz Henrique C, AU - Avena-Bustillos,Roberto J, AU - Filho,Gino Ceotto, AU - Munford,Maximiliano L, AU - Wood,Delilah, AU - McHugh,Tara H, PY - 2010/5/25/entrez PY - 2010/5/25/pubmed PY - 2010/9/14/medline SP - N1 EP - 7 JF - Journal of food science JO - J Food Sci VL - 75 IS - 1 N2 - UNLABELLED: Chitosan is a biopolymer obtained by N-deacetylation of chitin, produced from shellfish waste, which may be employed to elaborate edible films or coatings to enhance shelf life of food products. This study was conducted to evaluate the effect of different concentrations of nanofiller (cellulose nanofibers, CNF) and plasticizer (glycerol) on tensile properties (tensile strength-TS, elongation at break-EB, and Young's modulus-YM), water vapor permeability (WVP), and glass transition temperature (T(g)) of chitosan edible films, and to establish a formulation to optimize their properties. The experiment was conducted according to a central composite design, with 2 variables: CNF (0 to 20 g/100 g) and glycerol (0 to 30 g/100 g) concentrations in the film (on a dry basis), which was produced by the so-called casting technique. Most responses (except by EB) were favored by high CNF concentrations and low glycerol contents. The optimization was based on maximizing TS, YM, and T(g), and decreasing WVP, while maintaining a minimum acceptable EB of 10%. The optimum conditions were defined as: glycerol concentration, 18 g/100 g; and CNF concentration, 15 g/100 g. AFM imaging of films suggested good dispersion of the CNF and good CNF-matrix interactions, which explains the good performance of the nanocomposite films. PRACTICAL APPLICATION: Chitosan is a biodegradable polymer which may be used to elaborate edible films or coatings to enhance shelf life of foods. This study demonstrates how cellulose nanofibers (CNF) can improve the mechanical and water vapor barrier properties of chitosan films. A nanocomposite film with 15% CNF and plasticized with 18% glycerol was comparable to some synthetic polymers in terms of strength and stiffness, but with poorer elongation and water vapor barrier, indicating that they can be used for applications that do not require high flexibility and/or water vapor barrier. The more important advantage of such films when compared to synthetic polymer films is their environmentally friendly properties. SN - 1750-3841 UR - https://www.unboundmedicine.com/medline/citation/20492188/Nanocellulose_reinforced_chitosan_composite_films_as_affected_by_nanofiller_loading_and_plasticizer_content_ L2 - https://doi.org/10.1111/j.1750-3841.2009.01386.x DB - PRIME DP - Unbound Medicine ER -