Publicação
Effect of green propolis extract on functional properties of active pectin-based films
| Resumo: | Green propolis is an attractive natural source of antioxidant and antimicrobial compounds. In this paper, pectin (P) films incorporated with green propolis extract (PE) (i.e., P/PE films) were prepared by casting. The effect of different PE concentrations (13% w/w) on films' physicochemical properties was investigated for the first time. Regardless of the PE concentration added, no significant morphological and structural changes of the P-based films were identified using scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR) analysis. However, a reduction in the crystallinity of the P films was observed through the X-ray diffraction (XRD) analysis, which was correlated to film tensile strength (TS) reduction from 19.0 (P film) to 14.8 MPa (P/PE3% film). The other mechanical and water vapor barrier properties did not change significantly. However, the incorporation of PE improved UV-light barrier properties of the P films. Additionally, antioxidant activity of the P films (12.6%) considerably increased to 54.8% (P/PE3% film), suggesting the potential of P/PE film to be used as active food packaging. |
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| Autores principais: | Júnior, Luís Marangoni |
| Outros Autores: | Gonçalves, Sayeny de Ávila; Silva, Renan Garcia da; Martins, Joana T.; Vicente, A. A.; Alves, Rosa Maria Vercelino; Vieira, Roniérik Pioli |
| Assunto: | Active packaging Bio-based film Pectin Antioxidant capacity UV-screen protection |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Green propolis is an attractive natural source of antioxidant and antimicrobial compounds. In this paper, pectin (P) films incorporated with green propolis extract (PE) (i.e., P/PE films) were prepared by casting. The effect of different PE concentrations (13% w/w) on films' physicochemical properties was investigated for the first time. Regardless of the PE concentration added, no significant morphological and structural changes of the P-based films were identified using scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR) analysis. However, a reduction in the crystallinity of the P films was observed through the X-ray diffraction (XRD) analysis, which was correlated to film tensile strength (TS) reduction from 19.0 (P film) to 14.8 MPa (P/PE3% film). The other mechanical and water vapor barrier properties did not change significantly. However, the incorporation of PE improved UV-light barrier properties of the P films. Additionally, antioxidant activity of the P films (12.6%) considerably increased to 54.8% (P/PE3% film), suggesting the potential of P/PE film to be used as active food packaging. |
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