2026-04-17T08:23:30Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/114882026-03-24T01:05:47Zcom_10259_4313com_10259_5086com_10259_2604col_10259_4314
Repositorio Institucional de la Universidad de Burgos
author
Sedano Labrador, Carlos
author
Herrero, Manuel
author
Trigo López, Miriam
author
Rodríguez Pérez, Miguel Ángel .
author
Merino, Juan Carlos
author
García Pérez, José Miguel
author
Vallejos Calzada, Saúl
author
Núñez-Carrero, Karina C.
2026-03-23T12:17:34Z
2026-03-23T12:17:34Z
2026-01
2662-4443
https://hdl.handle.net/10259/11488
10.1038/s43246-025-01040-6
2662-4443
Multilayer plastic packaging offers essential barrier and mechanical properties for food preservation, but its complex structure prevents effective recycling. Here, we report a light-responsive thermoplastic adhesive designed to enable on-demand separation of polymer layers in multilayer packaging. The adhesive adopts a triblock architecture with terminal blocks compatible with polyethylene (PE) and polyamide (PA), and a central segment functionalised with coumarin-based photoremovable groups. Upon ultraviolet (UV) exposure, the adhesive undergoes complete molecular breakdown, triggering clean delamination without solvents or mechanical force. Fabricated PE – photosensitive adhesive – PA films demonstrated superior adhesion performance compared to a commercial benchmark during service life, and efficient separation upon irradiation, as confirmed by Fourier transform infrared (FTIR) spectroscopy, microscopy, and T-peel testing. Life cycle assessment revealed that, while the laboratory-scale synthesis has higher environmental costs, the impact is offset after a single reuse cycle in projected industrial conditions, reaching up to 80% reduction after six cycles. This approach provides a scalable strategy to reconcile performance and recyclability in multilayer packaging.
eng
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Coumarin-inspired light-responsive thermoplastic adhesives for recyclable multilayer packaging
info:eu-repo/semantics/article
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URL
https://riubu.ubu.es/bitstream/10259/11488/1/Sedano-cm_2026.pdf
File
MD5
bb8632c9788b4c4c27272ed6097544a3
2265303
application/pdf
Sedano-cm_2026.pdf