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BIBTEX RIS

Encapsulation and antioxidant activity of assai pulp oil (Euterpe oleracea) in chitosan/alginate polyelectrolyte complexes

2020; Elsevier BV; Volume: 109; Linguagem: Inglês

10.1016/j.foodhyd.2020.106097

1873-7137

Barbara Elisabeth Teixeira‐Costa, Bárbara Cristina Silva Pereira, Gisela Kloc Lopes, Cristina T. Andrade,

Polysaccharides and Plant Cell Walls

In this study, the effect of different amounts of assai pulp oil (AO), between 0.25 and 0.75%, and calcium chloride, 0–1.0%, in the formation of chitosan/alginate polyelectrolyte complexes (PECs) was investigated using a central composite design. AO and CaCl2 significantly influenced the size and polydispersity index of the PECs. However, the encapsulation efficiency (>99%) was not affected by these factors. The PECs exhibited a gel-like behavior, consistent with the formation of chitosan (CS) and sodium alginate (SA) complexes. Complex formation and AO encapsulation were also confirmed by infrared spectroscopy and thermogravimetric analyses. AO and the optimized PEC (0.5% AO and 0.5% CaCl2) presented high antioxidant activity (>70%) against the DPPH radical. As the AO encapsulated in CS/SA PECs exhibited satisfactory physicochemical and bioactive properties, their incorporation in biodegradable films for food packaging would be a potential application.