Stability of Nanocomposite Edible Films Based on Polysaccharides and Vitamin C from Agroindustrial Residue
AUTOR(ES)
Nascimento, José Augusto de Almeida
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
18/04/2019
RESUMO
The agroindustrial residue from the production of acerola pulp is rich in residual vitamin C. Thus, aiming its extraction and stabilization, this work proposed the nanoparticle (NP) encapsulation via ionic gelation with subsequent preparation of nanocomposites (NC) film based on galactomannan matrix. NP were characterized and their stabilities were evaluated under different storage conditions (incidence of light, temperature and oxidizing atmosphere). The results by Dynamic Light Scattering (DLS) and Scanning Electron Microscopy (SEM) indicated homogeneous morphology, spherical shape and size of ~220 nm. Regarding the stability, the UV-visible spectrophotometric analysis showed a much lower degradation rate for encapsulated vitamin C, resulting in more than 30% of preservation compared with the non-encapsulated systems at the end of 15th day of storage. In agreement, the NC films also resulted in preservation of vitamin C mainly for the test in high temperature, which maintained about 80% of the initial concentration, whereas in the non-encapsulated condition this value fell to 45%. The morphological analysis of these films by SEM indicated good distribution of the NP in the galactomannan matrix. Thus, the results indicate the feasibility of using the encapsulation method to stabilize vitamin C extracted from the agroindustrial residue of acerola.
Documentos Relacionados
- Nanocomposite edible films from mango puree reinforced with cellulose nanofibers.
- Nanocomposite Films Based on Flaxseed Gum and Cellulose Nanocrystals
- Preparation, Characterization and Photostability of Nanocomposite Films Based on Poly(acrylic acid) and Montmorillonite
- Edible films and coatings from tropical fruits.
- Utilization of Uncaria gambir Roxb filtrate in the formation of bioactive edible films based on corn starch