Lignin-Containing Cellulose Acetate Films from Grapevine Waste: A Sustainable Path to Compostable Bioplastics.

ABSTRACT: Grapevine shoots, a viticultural residue rich in cellulose (∼34%) and lignin (20-27%), were valorized through an eco-designed biorefinery process integrating autoclave-assisted pretreatment and organosolv extraction. This approach enabled the corecovery of cellulose and lignin under mild, sulfur-free conditions, followed by a chlorine-free bleaching that retained ∼7 wt % lignin within the cellulose. Rather than being removed, lignin was preserved as a natural additive for its antioxidant and UV-shielding functions, reducing the need for synthetic components. The lignin-containing cellulose was acetylated (DS ≈ 1.7) and plasticized with glycerol to produce biodegradable films. These films fully disintegrated under home composting within 8 weeks, outperforming commercial cellulose acetate. T

SUBMITTER: Lettieri R 

PROVIDER: S-EPMC12486438 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature