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

Materials

Jesús Manuel Quiroz-Castillo³  Dora Evelia Rodríguez-Félix³  Heriberto Grijalva-Monteverde³  Lauren Lucero Lizárraga-Laborín³  Mar໚ Mónica Castillo-Ortega³  Teresa del Castillo-Castro³  Francisco Rodríguez-Félix¹  Pedro Jesús Herrera-Franco² 

[1] Departamento de Investigación y Posgrado en Alimentos, Universidad de Sonora, C.P. 83000 Hermosillo, Sonora, Mexico; E-Mail:;Unidad de Materiales, centro de Investigación Científica de Yucatán, C.P. 97200 Mérida, Yucatán, Mexico; E-Mail:;Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, C.P. 83000 Hermosillo, Sonora, Mexico; E-Mails:

关键词: polyethylene;    chitosan;    poly(lactic acid);    maleic anhydride;    extrusion;   

DOI  :  10.3390/ma8010137

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.