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Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion

The use of blends containing biodegradable polymers like starch and poly (lactic acid) (PLA) has gained considerable attention, especially for the food packaging production. Current research has also highlighted the use of chitosan because their antimicrobial activity, biodegradability and applicabi...

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Principais autores: Alberti, Matheus Luz, de Souza, Sílvio José, Gonçalves, Heliberto, Yamashita, Fabio, Shirai, Marianne Ayumi
Formato: Artigo
Idioma: Português
Publicado em: Universidade Tecnológica Federal do Paraná (UTFPR) 2015
Acesso em linha: http://periodicos.utfpr.edu.br/rebrapa/article/view/3479
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spelling peri-article-34792015-11-24T13:31:25Z Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion Alberti, Matheus Luz de Souza, Sílvio José Gonçalves, Heliberto Yamashita, Fabio Shirai, Marianne Ayumi Biodegradable polymer; Mechanical properties; Mass transfer; Microstructure The use of blends containing biodegradable polymers like starch and poly (lactic acid) (PLA) has gained considerable attention, especially for the food packaging production. Current research has also highlighted the use of chitosan because their antimicrobial activity, biodegradability and applicability in the production of active biodegradable food packaging. The objective of this work was to produce cassava starch and PLA sheets incorporated with chitosan by flat extrusion process (calendering-extrusion), and evaluate the mechanical, water vapor barrier and microstructural properties. In order to simplify the obtainment of the material reducing processing steps, all components of the blend were homogenized in one step extrusion The incorporation of chitosan in the starch/PLA sheets decreased significantly the tensile strength, Young's modulus, elongation at break and density. In addition, the scanning electron microscopy images showed the formation of non-homogeneous mixtures with the presence of pores between the blend compounds, and this fact affected the water vapor barrier properties increasing water vapor permeability, solubility and diffusion coefficients. It was possible to conclude that although the incorporation of chitosan to the starch/PLA sheets has not contributed to obtain materials with suitable properties, it was able to produce them by calendering-extrusion process in pilot scale. Studies about chitosan incorporation in starch and PLA sheets still needed. DOI: 10.14685/rebrapa.v6i1.208  Universidade Tecnológica Federal do Paraná (UTFPR) 2015-05-11 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf http://periodicos.utfpr.edu.br/rebrapa/article/view/3479 10.14685/rebrapa.v6i1.208 Brazilian Journal of Food Research; v. 6, n. 1 (2015); 80 - 90 Brazilian Journal of Food Research; v. 6, n. 1 (2015); 80 - 90 2448-3184 10.14685/rebrapa.v6i1 por http://periodicos.utfpr.edu.br/rebrapa/article/view/3479/pdf http://periodicos.utfpr.edu.br/rebrapa/article/downloadSuppFile/3479/375
institution Universidade Tecnológica Federal do Paraná
collection PERI
language Português
format Artigo
author Alberti, Matheus Luz
de Souza, Sílvio José
Gonçalves, Heliberto
Yamashita, Fabio
Shirai, Marianne Ayumi
spellingShingle Alberti, Matheus Luz
de Souza, Sílvio José
Gonçalves, Heliberto
Yamashita, Fabio
Shirai, Marianne Ayumi
Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
author_sort Alberti, Matheus Luz
title Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
title_short Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
title_full Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
title_fullStr Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
title_full_unstemmed Effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
title_sort effect of chitosan addition in starch and poly(lactic acid) sheets produced by extrusion
description The use of blends containing biodegradable polymers like starch and poly (lactic acid) (PLA) has gained considerable attention, especially for the food packaging production. Current research has also highlighted the use of chitosan because their antimicrobial activity, biodegradability and applicability in the production of active biodegradable food packaging. The objective of this work was to produce cassava starch and PLA sheets incorporated with chitosan by flat extrusion process (calendering-extrusion), and evaluate the mechanical, water vapor barrier and microstructural properties. In order to simplify the obtainment of the material reducing processing steps, all components of the blend were homogenized in one step extrusion The incorporation of chitosan in the starch/PLA sheets decreased significantly the tensile strength, Young's modulus, elongation at break and density. In addition, the scanning electron microscopy images showed the formation of non-homogeneous mixtures with the presence of pores between the blend compounds, and this fact affected the water vapor barrier properties increasing water vapor permeability, solubility and diffusion coefficients. It was possible to conclude that although the incorporation of chitosan to the starch/PLA sheets has not contributed to obtain materials with suitable properties, it was able to produce them by calendering-extrusion process in pilot scale. Studies about chitosan incorporation in starch and PLA sheets still needed. DOI: 10.14685/rebrapa.v6i1.208 
publisher Universidade Tecnológica Federal do Paraná (UTFPR)
publishDate 2015
url http://periodicos.utfpr.edu.br/rebrapa/article/view/3479
_version_ 1805294332098379776
score 10,814766

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