Biopolymer-Based Films from Sodium Alginate and Citrus Pectin Reinforced with SiO2

Author(s)

Marangoni Junior, Luis ; Fozzatti, Camila Rodrigues ; Jamroz, Ewelina ; Vieira, Ronierik Pioli ; Vercelino Alves, Rosa Maria

• Document type: Journal article
• Source: MATERIALS; v. 15, n. 11, p. 12-pg., 2022-06-01.

Abstract

Blend films based on sodium alginate (SA) and citrus pectin (P) reinforced with different concentrations of SiO2 (0-10% w/w) were developed in this study. From the morphological (SEM) and structural (FT-IR) evaluation, it was verified that the incorporation of the reinforcing agent did not drastically modify the microstructure of the films, nor did new chemical bonds form. However, the XRD results suggested a slight reduction in the crystallinities of the blends by the incorporation of SiO2. Among the formulations prepared, the addition of a 5% reinforcing agent was responsible for the simultaneous improvement of mechanical and barrier properties. Comparing the control sample (SA/P) with the SA/P/5.0%SiO2 film, the tensile strength increased from 27.7 +/- 3.7 to 40.6 +/- 4.5 MPa, and the water-vapor transmission rate decreased from 319.8 +/- 38.7 to 288.9 +/- 23.5 g m(-2) day(-1). Therefore, SiO2, as a reinforcing agent in SA/P blends, represents a simple and effective strategy for improving the properties of biopolymer-based films in applications, such as packaging. (AU)

• FAPESP's process: 21/04043-2 - Food-packaging-process interaction: effect of emerging processing technologies and different food simulants on packaging properties
• Grantee: Luís Marangoni Júnior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral