Eco-friendly gelatin films with rosin-grafted cellulose nanocrystals for antimicrobial packaging

Author(s)

Leite, Liliane S. F. ^{[1, 2, 3]} ; Bilatto, Stanley ^[2] ; Paschoalin, Rafaella T. ^[4] ; Soares, Andrey C. ^[2] ; Moreira, V, Francys K. ; Oliveira, Jr., Osvaldo N. ^[4] ; Mattoso, Luiz H. C. ^{[1, 2]} ; Bras, Julien ^{[3, 5]}

Affiliation

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

^[2] Embrapa Instrumentacao, Natl Nanotechnol Lab Agribusiness, XV Novembro St 1452, BR-13560979 Sao Carlos - Brazil

^[3] Univ Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38400 Grenoble - France

^[4] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos - Brazil

^[5] Nestle Res Ctr, CH-1000 Lausanne - Switzerland

• Document type: Journal article
• Source: International Journal of Biological Macromolecules; v. 165, n. B, p. 2974-2983, DEC 15 2020.
• Web of Science Citations: 6

Abstract

We report on gelatin films incorporating rosin-grafted cellulose nanocrystals (r-CNCs), which fulfill the most relevant requirements for antimicrobial packaging applications. Transparent gelatin/r-CNCs bionanocomposite films (0.5-6 wt% r-CNCs) were obtained by solution casting and displayed high UV-barrier properties, which were superior to the most used plastic packaging films. The gelatin/r-CNCs films exhibited a moderate water vapor permeability (0.09 g mm/m(2) h kPa), and high tensile strength (40 MPa) and Young's modulus (1.9 GPa). The r-CNCs were more efficient in improving the optical, water vapor barrier and tensile properties of gelatin films than conventional CNCs. Grafting of rosin on CNCs resulted in an antimicrobial nanocellulose that inhibited the growth of Staphylococcus aureus and Escherichia coli. The antibacterial properties of r-CNCs were sustained in the gelatin films, as demonstrated by agar diffusion tests and proof-of-principle experiments involving cheese storage. Overall, the incorporation of r-CNCs as active fillers in gelatin films is a suitable approach for producing novel eco-friendly, antimicrobial packaging materials. (c) 2020 Elsevier B.V. All rights reserved. (AU)

• 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 type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 17/18725-2 - Hybrid core-shell and Janus nanofibers obtained by solution blow spinning
• Grantee: Rafaella Takehara Paschoalin
• Support type: Scholarships in Brazil - Post-Doctorate
• 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 type: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
• Grantee: Osvaldo Novais de Oliveira Junior
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 18/18953-8 - Nanostructured films applied in microfluidic biosensors to mastitis detection
• Grantee: Andrey Coatrini Soares
• Support type: Scholarships in Brazil - Post-Doctorate