Reusable, Recyclable, and Biodegradable Heat-Shrinkable Melt Cross-Linked Poly(butylene adipate- co -terephthalate)/Pulp Biocomposites for Polyvinyl Chloride Replacement.

Autor:	Avella A; Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, 41258 Gothenburg, Sweden.; Wallenberg Wood Science Centre, Chalmers University of Technology, Kemigården 4, 41296 Gothenburg, Sweden., Salse M; Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, 41258 Gothenburg, Sweden.; Laboratoire MATEIS, Institut National des Sciences Appliquées Lyon, Bât. B. Pascal, Avenue Jean Capelle, 69621 Villeurbanne, France.; Wallenberg Wood Science Centre, Chalmers University of Technology, Kemigården 4, 41296 Gothenburg, Sweden., Sessini V; Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, 41258 Gothenburg, Sweden.; Department of Organic and Inorganic Chemistry, Institute of Chemical Research 'Andrés M. del Río' (IQAR), Universidad de Alcalá, Campus Universitario, Alcalá de Henares, 28871 Madrid, Spain.; Wallenberg Wood Science Centre, Chalmers University of Technology, Kemigården 4, 41296 Gothenburg, Sweden., Mincheva R; Laboratory of Polymeric and Composite Materials, University of Mons (UMons), 7000 Mons, Belgium., Lo Re G; Department of Industrial and Materials Science, Chalmers University of Technology, Rännvägen 2A, 41258 Gothenburg, Sweden.; Wallenberg Wood Science Centre, Chalmers University of Technology, Kemigården 4, 41296 Gothenburg, Sweden.
Jazyk:	angličtina
Zdroj:	ACS sustainable chemistry & engineering [ACS Sustain Chem Eng] 2024 Mar 15; Vol. 12 (13), pp. 5251-5262. Date of Electronic Publication: 2024 Mar 15 (Print Publication: 2024).
DOI:	10.1021/acssuschemeng.4c00012
Abstrakt:	Heat-shrinkable films are widely used as disposable secondary packaging but are conventionally made from fossil-based and nonbiodegradable polyvinyl chloride or polyethylene. To lower the environmental impact of such products, this work reports the development of recyclable, biodegradable, and partially biosourced heat-shrinkable biocomposites that are cost-competitive with existing shrink wraps. Poly(butylene adipate- co -terephthalate), a growing biodegradable thermoplastic, was simultaneously reinforced with pulp fibers and partially cross-linked in a single-step reactive melt processing. The designed peroxide-initiated reaction led to a 55 wt % cocontinuous insoluble gel incorporating all the pulp fibers into a cross-linked polymer network. In the solid state, the cross-linked biocomposite shows 60% elongation at break with a 200% increase in Young's modulus, while the only addition of pulp fibers stiffens and embrittles the matrix. Creep tests in the melt state indicated that the cross-linked network induces homogeneous shrinking even during the loading phase, demonstrating the potential use of the biocomposites as heat-shrinkable films. The shrinking also promotes the shape-memory of the biocomposite, which retains its dimensions after four cycles. The circularity of the materials was assessed by mechanical recycling and industrial composting, which have proven feasible end-of-life options for heat-shrinkable biocomposites. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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