Effect of Tannic Acid and Cellulose Nanocrystals on Antioxidant and Antimicrobial Properties of Gelatin Films

Author(s)

Leite, Liliane Samara Ferreira ^{[1, 2, 3]} ; Pham, Cynthia ^{[4, 5]} ; Bilatto, Stanley ^[3] ; Azeredo, Henriette M. C. ^{[3, 6]} ; Cranston, Emily D. ^[4] ; Moreira, Francys Kley ^[7] ; Mattoso, Luiz Henrique C. ^[3] ; Bras, Julien ^{[2, 8]}

Affiliation

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn PPGCEM, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38400 Grenoble - France

^[3] Embrapa Instrumentacao, Natl Nanotechnol Lab Agribusiness, BR-13560979 Sao Carlos, SP - Brazil

^[4] Univ British Columbia, Dept Wood Sci, Vancouver, BC V6T 1Z4 - Canada

^[5] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z4 - Canada

^[6] Embrapa Agroind Trop, BR-60511110 Fortaleza, Ceara - Brazil

^[7] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

^[8] Nestle Res Ctr, CH-1000 Lausanne - Switzerland

• Document type: Journal article
• Source: ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 9, n. 25, p. 8539-8549, JUN 28 2021.
• Web of Science Citations: 0

Abstract

This work explored gelatin films incorporated with cellulose nanocrystals (CNC) and tannic acid as bio-based multifunctional food packaging materials. The effects of nonoxidized tannic acid (nTA), oxidized tannic acid (OTA), and CNC on the physical, antioxidant, and antimicrobial properties of gelatin films were investigated. Rheological and ultraviolet (UV)-visible measurements showed that gelatin films with nTA and CNC presented a lower chemical cross-linking and more noncovalent intermolecular interactions in comparison with those containing OTA. When compared to the film containing only nTA, the one with nTA and CNC presented substantial increases in the antioxidant capacity (52%), UV barrier (76%), tensile strength (79%), and water vapor barrier (67%) properties of gelatin. This evidence suggested that noncovalent interactions from nTA molecules and CNC play an important role in the modification of gelatin. The gelatin films designed with nTA and CNC also exhibited antimicrobial effects against Staphylococcus aureus and Escherichia coli. Overall, the incorporation of CNC and nTA as active components to gelatin films is a suitable approach for producing sustainable, multifunctional materials for food packaging and other applications. (AU)

• FAPESP's process: 18/00278-2 - Functionalization, characterization and properties evaluation of cellulose nanocrystals and their bionanocomposites based on protein
• Grantee: Liliane Samara Ferreira Leite
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 18/10899-4 - Utilization of residual lignocellulosic biomass from 2G ethanol processing to obtain nanocellulose via enzymatic route
• Grantee: Stanley Endrigo Bilatto Rodrigues
• Support Opportunities: Scholarships in Brazil - Post-Doctoral