Active Food Packaging Based On Cassava Residues/Seriguela Residue Extract/nanoZnO

Objective: Produce and characterize films based on starch production using extraction from industrial cassava processing as a polymeric matrix, incorporated with nanoZnO and the extract of residues from seriguela processing, with a focus on obtaining active biomaterial for application in food packaging. Theoretical Framework: The production of sustainable materials based on renewable natural resources, such as agricultural crop by-products, produced in large quantities and with little or no added value, has become an increasingly urgent global need, especially for the packaging sector. Method: The cassava residue was supplied by two processing units: the peels by the company José C. da Silva - Farinha (Farinha Quatis ®) located in Lagoa de Itaenga /PE, and the bagasse by Prata Fina® located in the city of Lagoa Salgada /RN. Then, they (peels and bagasse) were subjected to drying at 50 °C, in an oven with air circulation (MA035/5 - MARCONI, Brazil), until a moisture content equal to or less than 10%, and then ground in a multipurpose mill. Subsequently, films were produced with the residue produced with the addition of seriguela extract and nanoZnO. Results and Discussion: CRF presented significant starch content (74.53 g.100g -1 ) and SRE a high phenolic content (1013.7 μgEAG.mL -1 ) with strong antioxidant capacity, but additive films showed low phenolic retention, reinforcing blending necessity. No significant change in solubility (> 80%). However, all conditions had efficient water vapor barrier (0.0004 to 0.004 g.mm/m 2 .h.kPa). A/B films became darker with low light transmission in visible and UV regions. Partial inhibition of S. aureus (greater effectiveness) and E. coli was observed. Therefore, residues and nanoZnO demonstrated potential application in active packaging field. Research Implications: The results demonstrate the importance of the agri-food waste evaluated in this study having full/maximum use, which brings an important advance in the packaging sector, since studies with this approach are still scarce. Originality/Value: Future prospects indicate the application of these materials in agriculture, avoiding crop losses, as superabsorbent films with high water absorption capacity (> 100%), or in drug delivery systems.