journal article May 10, 2018

Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films

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Abstract
ABSTRACTConcern about environmental issues has motivated research into the development of biodegradable packaging from renewable sources. Natural polymers such as starch constitute a good alternative for diminishing the use of nonbiodegradable and nonrenewable components in the packaging industry. However, depending on the botanical source, films with different properties are formed. The aim of this study was to evaluate the film‐forming capacity of different starch sources (cassava, corn, potato, and wheat) by casting with starch contents from 2 to 6%. Principal component analysis methodology was used to evaluate the correlation between the formulations and their physicochemical and mechanical properties. It was not possible to produce continuous films based on potato starch, probably because of its very low amylose content (10%). The corn‐, cassava‐, and wheat‐starch‐based films were characterized by their thicknesses (0.06–0.22 mm), moisture contents (19–26%), water solubilities (13.7–26.5%), water‐vapor permeabilities (WVPs; 0.19–0.48 g mm h−1 m−2 kPa−1), wettabilities (35–106°), biodegradabilities in soil, and thermal and mechanical properties (tensile strength = 1.9–6.7 MPa, elongation = 41–166%, and Young's modulus = 8–127 MPa). The wheat starch films presented higher WVPs and lower mechanical properties. The cassava starch films presented lower wettabilities and good mechanical properties; this suggested that their use in packaging for products, such as fruits and vegetables, with higher water activities could be feasible. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46564.
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Details
Published
May 10, 2018
Vol/Issue
135(33)
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Funding
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
Fundacão de Amparo à Pesquisa do Estado do Rio Grande do Sul
Cite This Article
Cláudia Leites Luchese, Patrícia Benelli, Jordana Corralo Spada, et al. (2018). Impact of the starch source on the physicochemical properties and biodegradability of different starch‐based films. Journal of Applied Polymer Science, 135(33). https://doi.org/10.1002/app.46564
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