Evaluation of Interactions Between Carboxymethylcellulose and Soy Protein Isolate and their Effects on the Preparation and Characterization of Composite Edible Films

Author(s)

de Oliveira, Maria Mariana Garcia ^[1] ; de Souza Silva, Keila ^[2] ; Mauro, Maria Aparecida ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Biosci Humanities & Exact Sci, Dept Food Engn & Technol, St Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto - Brazil

^[2] State Univ Maringa UEM, Dept Technol, Ave Angelo Moreira da Fonseca 1800, BR-87506370 Umuarama - Brazil

• Document type: Journal article
• Source: FOOD BIOPHYSICS; v. 16, n. 2 JAN 2021.
• Web of Science Citations: 0

Abstract

Interactions between carboxymethylcellulose (CMC) and soy protein isolate (SPI) were assessed to determine their effects on the physicochemical and morphological properties of SPI-based films. The protein-polysaccharide interactions were investigated by measuring zeta potentials, showing a dependence on the pH, ionic strength and polysaccharide concentration. SPI-based films were prepared with different CMC concentrations (0-0.5%) at pH 11 and the pH of biopolymer coacervation (pHc). The addition of CMC improved mechanical strengths of all films, but films prepared at pHc showed a reduction in percentage of elongation at break, becoming more brittle than at pH 11. The water vapor permeability did not show a strict dependence on the CMC concentration or pH, while the oxygen permeability of films prepared at pH 11 decreased with the addition of CMC until reaching a minimal value at 0.375% CMC. These results reveal the significant effects of SPI-CMC interactions on the formation and properties of films, indicating the potential of this approach to better tailor edible films and coatings for specific applications. (AU)

• FAPESP's process: 17/08544-0 - Study of thermal intermittence and edible coating application to papaya drying and its effects on process efficiency and product quality
• Grantee: Maria Mariana Garcia de Oliveira
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 17/02808-6 - Minimal processes applied to fruits and vegetables: quality enhancement and energy savings
• Grantee: Maria Aparecida Mauro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/24259-0 - Peptide and chitosan conjugates with pharmacological potential: synthesis, prospecting of activity in membrane mimetic systems, and evaluation in cells
• Grantee: Marcia Perez dos Santos Cabrera
• Support Opportunities: Research Grants - Young Investigators Grants