Recycling of different types of polyurethane foam wastes via acidolysis to produce polyurethane coatings


Aiming to minimize the issues associated with the disposal of polymers, in this work polyurethanes foams (PUF) scraps were recycled using dicarboxylic acids (DA). Different types of PUF were tested, being the reaction between PUF scraps with the DA monitored using spectroscopy analysis. The obtained hydroxyl number and acid value of the recycled polyol (RP) were suitable to produce new polyurethanes (PU), therefore, it was used to produce wood PU coatings (PUC). Analyzing the surface properties of the coatings, it was observed that the coating derived from RP presents higher hardness, lower gloss and its more hydrophobic than the conventional polyol derived coating. These results can be associated with the aromatic moieties presents in the RP, which results as well in stiffer and more thermal stable coatings. From the results, the suitability of this recycling method of PUF and its subsequently use in the production of PUC was demonstrated.



subject category

Green & Sustainable Science & Technology; Energy & Fuels; Materials Science, Multidisciplinary


Godinho, B; Gama, N; Barros-Timmons, A; Ferreira, A

our authors


This work is financed by ERDF Funds through Operational Competitiveness and Internationalization Programme -COMPETE 2020 in the frame of the project FlexiRecover -POCI-01-0247-FEDER-003369 and of the project CICECO-Aveiro Institute of Materials, FCT Ref. UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MCTES. B. Godinho and N. Gama contributed equally to this work.

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