Journal
CARBOHYDRATE POLYMERS
Volume 176, Issue -, Pages 187-194Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.08.079
Keywords
Active and smart biodegradable films; Cassava starch; Green tea and basil extracts; Antioxidant; Food packaging
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Funding
- National Research Council of Argentina (CONICET) [11220120100508CO]
- University of Buenos Aires
- UBACYT [20020130100495BA, 20020120100336BA, 20020130200282BA]
- ANPCyT [PICT-2012-1093]
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Active and smart biodegradable films from cassava starch and glycerol with 5 wt.% of different natural extracts such as green tea and basil were obtained by casting. Their functional capacity as antioxidants and their physicochemical properties achieved from the incorporation of these types of extracts were evaluated. The content of phenolic compounds in the extracts led to films with significant antioxidant activity, being greater in the case of the system containing green tea extract. Color changes in both materials after immersion in different media (acid and basic) due to the presence of chlorophyll and carotenoids in the extracts were observed, but the film with basil extract reacted most notably to the different pH. These films degraded in soil under two weeks and were thermal stable up to 240 degrees C. Finally, the incorporation of extracts of green tea and basil led to thermoplastic starch films with lower water vapor permeability retaining their flexibility.
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