De Luca Bossa, Ferdinando and Santillo, Chiara and Verdolotti, Letizia and Campaner, Pietro and Minigher, Andrea and Boggioni, Laura and Losio, Simona and Coccia, Francesca and Iannace, Salvatore and Lama, Giuseppe Cesare (2020) Greener Nanocomposite Polyurethane Foam Based on Sustainable Polyol and Natural Fillers: Investigation of Chemico-Physical and Mechanical Properties. Materials, 13. pp. 211-228. ISSN 1996-1944
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Abstract
Nowadays, the chemical industry is looking for sustainable chemicals to synthesize nanocomposite bio-based polyurethane foams, PUs, with the aim to replace the conventional petrochemical precursors. Some possibilities to increase the environmental sustainability in the synthesis of nanocomposite PUs include the use of chemicals and additives derived from renewable sources (such as vegetable oils or biomass wastes), which comprise increasingly wider base raw materials. Generally, sustainable PUs exhibit chemico-physical, mechanical and functional properties, which are not comparable with those of PUs produced from petrochemical precursors. In order to enhance the performances, as well as the bio-based aspect, the addition in the polyurethane formulation of renewable or natural fillers can be considered. Among these, walnut shells and cellulose are very popular wood-based waste, and due to their chemical composition, carbohydrate, protein and/or fatty acid, can be used as reactive fillers in the synthesis of Pus. Diatomite, as a natural inorganic nanoporous filler, can also be evaluated to improve mechanical and thermal insulation properties of rigid PUs. In this respect, sustainable nanocomposite rigid PU foams are synthesized by using a cardanol-based Mannich polyol, MDI (Methylene diphenyl isocyanate) as an isocyanate source, catalysts and surfactant to regulate the polymerization and blowing reactions, H2O as a sustainable blowing agent and a suitable amount (5 wt%) of ultramilled walnut shell, cellulose and diatomite as filler. The effect of these fillers on the chemico-physical, morphological, mechanical and functional performances on PU foams has been analyzed
| Item Type: | Article |
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| Subjects: | 600 Tecnologia - Scienze applicate > 660 Ingegneria chimica > 661 Tecnologia delle sostanze chimiche industriali > 661.8 Sostanze chimiche organiche |
| Depositing User: | Drs. Laura Boggioni |
| Date Deposited: | 20 Sep 2021 13:35 |
| Last Modified: | 20 Sep 2021 13:35 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/21366 |
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