Abstract
Starch and chitosan are biodegradable polymers from renewable sources that can be used to overcome the serious environmental problem caused by improper disposal of synthetic plastic materials, non-biodegradable, derived from petroleum sources. The starch–chitosan based films manufactured allow improving the better characteristics of each one, adding their good characteristics and compensating for some limitations. In this work, it was studied: two sources of starch (corn and cassava), two different modes of chitosan addition (chitosan blended in the starch filmogenic solution and chitosan as coating), and the effect of glutaraldehyde as crosslinking agent. All films were prepared by casting using glycerol as a plasticizer and were characterized by their physicochemical (water vapor permeability, water contact angle, and FTIR), mechanical, and antimicrobial properties. The properties analyzed were influenced by all variables tested. Moreover, the principal component analysis was also conducted in order to relate and describe the variables analyzed. The antimicrobial activity of the corn starch-based films containing chitosan was confirmed, and these films have potential for development of active packaging.
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Acknowledgements
The authors acknowledge the financial support received from the National Council for Scientific and Technological Development (CNPq), the Coordination for the Improvement of Higher Level Personnel (CAPES), and the Research Support Foundation of the State of Rio Grande do Sul (FAPERGS) of Brazil. In particular, to thank CAPES CSF-PVE’s Project, process number 88881.068177/2014-01.
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Luchese, C.L., Pavoni, J.M.F., dos Santos, N.Z. et al. Effect of chitosan addition on the properties of films prepared with corn and cassava starches. J Food Sci Technol 55, 2963–2973 (2018). https://doi.org/10.1007/s13197-018-3214-y
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DOI: https://doi.org/10.1007/s13197-018-3214-y