Gelatin/chitosan based films loaded with nanocellulose from soybean straw and activated with ``Pitanga{''} (Eugenia uniflora L.) leaf hydroethanolic extract in W/O/W emulsion

Author(s)

Tessaro, Larissa ^[1] ; Lourenco, Rodrigo Vinicius ^[1] ; Martelli-Tosi, Milena ^[1] ; Sobral, Paulo Jose do Amaral ^{[1, 2]}

Affiliation

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Dept Food Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Sao Paulo, Food Res Ctr FoRC, Rua Lago 250, Semiind Bldg, Block C, Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: International Journal of Biological Macromolecules; v. 186, p. 328-340, SEP 1 2021.
• Web of Science Citations: 2

Abstract

Mechanical properties of biopolymer films can be a limitation for their application as packaging. Soybean straw crystalline nanocelluloses (NC) can act as reinforcement load to improve these material properties, and W/O/W double emulsion (DE) as encapsulating bioactive agents can contribute to produce active packaging. DE droplets were loaded with pitanga leaf (Eugenia uniflora L.) hydroethanolic extract. The mechanical, physicochemical, and barrier properties, and the microstructure of gelatin and/or chitosan films incorporated with NC or NC/DE were determined by classical methods. Film antioxidant activities were determined by ABTS and DPPH methods. The incorporation of NC/DE in gelatin and/or chitosan films (NC/DE films) changed the morphology of these films, which presented more heterogeneous air-side surfaces and cross-sections. They presented rougher topographies, notably greater resistance and stiffness, higher barrier properties to UV/Vis light and higher antioxidant activity than the NC films. Moisture content, solubility in water and water vapor permeability decreased due to the presence of DE. Overall, the NC/DE films improved all properties, when compared to the properties of NC films or those of films with only DE, from a previously published study. In spite of not having antimicrobial activity against the studied bacteria, NC/DE films did display a great antioxidant activity. (AU)

• FAPESP's process: 16/18788-1 - Raman microspectroscopy and chemometrics for the characterization of polymer-based microcarrier systems of active/photoactive compounds
• Grantee: Milena Martelli Tosi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/07914-8 - FoRC - Food Research Center
• Grantee: Bernadette Dora Gombossy de Melo Franco
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC