Details

Autor(en) / Beteiligte

• Leite, Liliane S.F.
• Bilatto, Stanley
• Paschoalin, Rafaella T.
• Soares, Andrey C.
• Moreira, Francys K.V.
• Oliveira, Osvaldo N.
• Mattoso, Luiz H.C.
• Bras, Julien

Titel

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

Ist Teil von

• International journal of biological macromolecules, 2020-12, Vol.165 (Pt B), p.2974-2983

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2020

Quelle

MEDLINE

Beschreibungen/Notizen

• 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/m2 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. [Display omitted] •Multifunctional films were attained by mixing gelatin and rosin-grafted cellulose nanocrystals.•Dipole-dipole interactions strengthen the hydrogen bond network formed between r-CNCs and gelatin.•r-CNCs improve the UV, and H2O barrier properties of gelatin films as much as conventional CNCs biobased films.•The mechanical strength of the gelatin matrix can be modulated by the r-CNCs content.•The bactericidal activity of rosin is shown in the gelatin nanocomposites with high r-CNCs contents.