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Development of Sodium Alginate Bioplastic Reinforced with Dried Orange Juice By-Product for Use in Packaging

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Author(s):
Bezerra, Pedro H. S. ; Souza-Santos, Yves J. ; Pallone, Eliria M. J. A. ; Carvalho, Rosemary A. ; Vanin, Fernanda M.
Total Authors: 5
Document type: Journal article
Source: POLYMERS; v. 16, n. 23, p. 16-pg., 2024-12-01.
Abstract

Pollution caused by nonrenewable plastics has driven the use of natural polymers. Similarly, the disposal of food waste still harms the environment. Considering both aspects, this study aimed to evaluate the effect of incorporating orange by-product powder (OBP) as a reinforcing material into sodium alginate films with glycerol. Sodium alginate-based films were produced using glycerol and various concentrations of OBP. The films were characterized in terms of thickness, color, water content, mechanical properties, light transmission, transparency, X-ray diffraction (XRD), Fourier-transform infrared spectrometry (FTIR), contact angle, solubility, swelling, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The addition of OBP significantly (p < 0.05) reduced the water content of the film from 37.75% +/- 5.80a (0-OBP) to 24.49% +/- 1.47b (45-OBP). The higher the concentration of OBP, the higher the tensile strength of the films, from 7.99 MPa +/- 0.91a (0-OBP) to 18 MPa +/- 1.38d (45-OBP), and the higher the hydrophobicity, from 57.60 degrees +/- 0.41a (0-OBP) to 70.34 degrees +/- 0.98c (45-OBP). From TGA and XRD analyses, it was observed that the incorporation of OBP resulted in less crystalline and more thermally resistant materials. Therefore, this study shows that OBP is a promising reinforcing component for sodium alginate films. (AU)

FAPESP's process: 18/03324-5 - Sustainable food production: a case study of Brazilian orange juice industry waste application.
Grantee:Fernanda Maria Vanin
Support Opportunities: Regular Research Grants
FAPESP's process: 21/12270-9 - Homemade and industrialized baby food: a theoretical and practical assessment of quality, safety, classification and consumer perception aspects
Grantee:Fernanda Maria Vanin
Support Opportunities: Regular Research Grants