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Preparation and Characterization of Films Extruded of Polyethylene/Chitosan Modified with Poly(lactic acid)

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Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, C.P. 83000 Hermosillo, Sonora, Mexico
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Departamento de Ingeniería Ambiental Industrial, Universidad Estatal de Sonora, C.P. 83100 Hermosillo, Sonora, México
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Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, C.P. 83000 Hermosillo, Sonora, Mexico
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Unidad de Materiales, centro de Investigación Científica de Yucatán, C.P. 97200 Mérida, Yucatán, Mexico
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Author to whom correspondence should be addressed.
Academic Editor: Naozumi Teramoto
Materials 2015, 8(1), 137-148; https://doi.org/10.3390/ma8010137
Received: 9 October 2014 / Accepted: 19 December 2014 / Published: 30 December 2014
The use of mixtures of synthetic and natural polymers is a potential option to reduce the pollution by plastic waste. In this work, the method for the chemical modification of chitosan with poly(lactic acid) was developed; then, the preparation of films of blends of polyethylene and chitosan-poly(lactic acid) produced by an extrusion method using polyethylene-graft maleic anhydride as a compatibilizer. It was possible to obtain films with a maximum content of 20 wt% and 30 wt%, chitosan, with and without compatibilizer, respectively. Scanning electron microscope (SEM) analysis showed a homogeneous surface on all films. The addition of the compatibilizer had a significant effect on the mechanical properties of the films, such as an increase in Young’s modulus and a decrease in the elongation at break; additionally, the compatibilizer promotes thermal degradation in a single step and gives the film a slight increase in thermal resistance. These results are attributed to an improved interaction in the interface of polyethylene and chitosan-poly(lactic acid), promoted by the compatibilizer. View Full-Text
Keywords: polyethylene; chitosan; poly(lactic acid); maleic anhydride; extrusion polyethylene; chitosan; poly(lactic acid); maleic anhydride; extrusion
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Quiroz-Castillo, J.M.; Rodríguez-Félix, D.E.; Grijalva-Monteverde, H.; Lizárraga-Laborín, L.L.; Castillo-Ortega, M.M.; Del Castillo-Castro, T.; Rodríguez-Félix, F.; Herrera-Franco, P.J. Preparation and Characterization of Films Extruded of Polyethylene/Chitosan Modified with Poly(lactic acid). Materials 2015, 8, 137-148.

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