Assessment of the enhancement potential of salicylic acid on physicochemical, mechanical, barrier, and biodegradability features of potato starch films

DÍAZ-DÍAZ, EDGAR D.; MALDONADO HARO, MARÍA L.; PATRIARCA, ANDREA; MELAJ, MARIANA; FORESTI, MARÍA L.; LÓPEZ-CÓRDOBA, ALEX; GOYANES, SILVIA

Food Packaging and Shelf Life

Elsevier

Año: 2023 vol. 38

2214-2894

Filmogenic suspensions based on starch (S) and salicylicacid/starch (SA-S) were prepared and used to produce casted films (TPS andSA-TPS). An extensive characterization was conducted on both suspensions andcasted films to assess their properties. Results evidenced that after storagefor 120 days at 4 ◦C and 25 ◦C, the mold and yeast counts were significantlylower in the SA-S than in the S suspensions. Moreover, SA-S had a much lower initialviscosity than S. In reference to the films produced, salicylic acid caused asignificant increase in film crystallinity, as well as a 2.3-fold increase instress at break and a 3.8-fold increase in Young’s modulus over the controlfilms. Additionally, compared to TPS, the SA-TPS films exhibited a 46% decreasein water vapor permeability. All films showed a high biodegradation extent(≥85%) upon 75 days of home composting. These findings suggest that thesalicylic acid addition at low concentrations (2 mM) can be a cost-effectiveapproach for the development of highly stable starch filmogenic suspensions andalso biobased films with distinguishing properties.