The obtaining of chitosan extruded films was possible by using low density polyethylene (LDPE) as a matrix polymer and ethylene-acrylic acid copolymer as an adhesive, in order to ensure adhesion in the interphase of the immiscible polymers. The obtained blend films were resistant; however, a reduction in the mechanical resistance was observed as chitosan concentration increased. The thermal stability of the films showed a certain grade of interaction between polymers as seen in FTIR spectra. The antifungal activity of the extruded films was assessed against Aspergillus niger and high inhibition percentages were observed, which may be mainly attributed to barrier properties of the extruded films and the limited oxygen availability, resulting in the inability of the fungi to grow. A low adherence of fungal spores to the material surface was observed, mainly in areas with chitosan clumps, which can serve as starting points for material degradation.

Original languageEnglish
Pages (from-to)666-674
Number of pages9
JournalCarbohydrate Polymers
Issue number2
StatePublished - 16 Jan 2013

Bibliographical note

Funding Information:
Financial support of the CONACyT (Project No. 53493) is gratefully acknowledged. Authors acknowledge Ing. Silvia Beatriz Andrade Canto from CICY, Yucatán, México, for her assistance in the SEM analysis of chitosan's films.


  • Antifungal activity
  • Chitosan films
  • Ethylene acrylic acid copolymer
  • Extrusion
  • Low density polyethylene (LDPE)


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