Incorporation of Oil From Hymenaea stigonocarpa and Hymenaea courbaril Into Biofilms Made From Arrowroot Starch: Physicochemical, Biodegradability and Antifungal Activity

Abstract

Incorporating of fixed oils in biodegradable packaging has an important action on the polymer matrix and biological activities on phytopathogens. This study aimed to evaluate the incorporation of fixed oils from the seeds of Hymenaea stigonocarpa and Hymenaea courbaril in the arrowroot starch biofilm matrix, evaluating the physicochemical parameters of biodegradability and antifungal activity on Colletotrichum acutatum, Colletotrichum gloeosporioides, Aspergillus tubingensis, Aspergillus fumigatus, Aspergillus niger and Rhizopus stolonifer. Both fixed oils from Hymenaea seeds showed biological antioxidant activity in reducing DPPH. Biofilms showed increasing variation in thickness ranging from 0.23-0.43 mm and decreasing moisture content and solubility 15.01-5.14% and 51.07-34.10%, respectively, as oil concentrations increased. The oil concentration also reduced the transparency rate, a considerable variation between the color and biodegradability parameters. However, the biofilms presented a mass reduction of more than 90% for this test. Biofilms still demonstrate considerable antifungal activity for the evaluated phytopathogens. The seed oil of Hymenaea stigonocarpa and Hymenaea courbaril played important roles in developing biopolymer matrices and special biological activity on potential phytopathological agents of fruits and grains.