Use este identificador para citar ou linkar para este item: http://repositorio.ital.sp.gov.br/jspui/handle/123456789/429
Título: Biopolymer-Based Films from Sodium Alginate and Citrus Pectin Reinforced with SiO2
Autor(es): Marangoni Júnior, Luís; et. al.







Palavras-chave: Packaging
Blend films
Polysaccharides
Reinforcing agents
Nanosilica
Data do documento: 2022
Citação: Materials, v. 15, p. 3881-3893. Doi 10.3390/ma15113881.
Resumo: 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.
URI: http://repositorio.ital.sp.gov.br/jspui/handle/123456789/429
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