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Photo-Induced Synthesis of Bioplastics from Xylan.
Summary
Scientists turned xylan, a plant fiber found in wood pulp waste, into a tough, clear plastic using light to bond the molecules together—and it breaks down naturally in soil within just 10 days. This matters because it could replace conventional plastics that shed microplastics and take centuries to decompose, while also testing as safe for cells and aquatic life, offering a cheaper, lower-carbon path away from plastic pollution.
Bioplastics derived from hemicellulose exhibit marked potential to substitute petroleum-based plastics due to their sustainability and biodegradability. However, developing bioplastics that combine facile manufacturing processes, excellent mechanical properties, and a low carbon footprint remains challenging. Herein, we present a strategy for fabricating high-performance bioplastics (XAGP) by crosslinking xylan molecular chains via photo-induced free-radical polymerization. The XAGP exhibits high light transmittance (95%), exceptional mechanical toughness (26 MJ/m) and mechanical strength (84 MPa), outstanding thermal stability, water-assisted processability, rapid biodegradability (10 days in nature soil), hypotoxicity in aquatic environments, and good biocompatibility (cell viability above 98%). Furthermore, cost and life cycle assessment results demonstrate that XAGP is a more sustainable alternative to commercial biodegradable plastics, offering greater cost-effectiveness and a reduced carbon dioxide emission. This work establishes a promising route for transforming pulp waste into degradable, high-performance bioplastics, providing an effective solution to both waste disposal and plastic pollution.