Leite, Liliane S. F.
[1, 2, 3]
Paschoalin, Rafaella T.
Soares, Andrey C.
Moreira, V, Francys K.
Oliveira, Jr., Osvaldo N.
Mattoso, Luiz H. C.
Total Authors: 8
 Univ Fed Sao Carlos, Grad Program Mat Sci & Engn PEGCEM, BR-13565905 Sao Carlos - Brazil
 Embrapa Instrumentacao, Natl Nanotechnol Lab Agribusiness, XV Novembro St 1452, BR-13560979 Sao Carlos - Brazil
 Univ Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos - Brazil
 Nestle Res Ctr, CH-1000 Lausanne - Switzerland
Total Affiliations: 5
International Journal of Biological Macromolecules;
DEC 15 2020.
Web of Science Citations:
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)