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Nanocellulose removes the need for chemical crosslinking in tannin-based rigid foams and enhances their strength and fire retardancy
dc.contributor.author | Missio, André Luiz | |
dc.contributor.author | Otoni, Caio Gomide | |
dc.contributor.author | Zhao, Bin | |
dc.contributor.author | Beaumont, Marco | |
dc.contributor.author | Khakalo, Alexey | |
dc.contributor.author | Kämäräinen, Tero | |
dc.contributor.author | Silva, Silvia Helena Fuentes da | |
dc.contributor.author | Mattos, Bruno Dufau | |
dc.contributor.author | Rojas, Orlando José | |
dc.date.accessioned | 2022-10-19T12:52:34Z | |
dc.date.available | 2022-10-19T12:52:34Z | |
dc.date.issued | 2022-07-25 | |
dc.identifier | https://doi.org/10.1021/acssuschemeng.2c02678 | por |
dc.identifier.citation | MISSIO, André Luiz; OTONI, Caio Gomide; ZHAO, Bin; BEAUMONT, Marco; KHAKALO, Alexey; KÄMÄRÄINEN, Tero; SILVA, Silvia Helena Fuentes da; MATTOS, Bruno Dufau; ROJAS, Orlando José. Nanocellulose removes the need for chemical crosslinking in tannin-based rigid foams and enhances their strength and fire retardancy. ACS Sustainable Chemistry & Engineering, v. 10, n. 31, p. 10303-10310, 2022. Disponível em: https://repositorio.ufscar.br/handle/ufscar/16898. | * |
dc.identifier.issn | 2168-0485 | por |
dc.identifier.uri | https://repositorio.ufscar.br/handle/ufscar/16898 | |
dc.description.abstract | Thermal insulation and fire protection are two of the most critical features affecting energy efficiency and safety in built environments. Together with the associated environmental footprint, there is a strong need to consider new insulation materials. Tannin rigid foams have been proposed as viable and sustainable alternatives to expanded polyurethanes, traditionally used in building enveloping. Tannin foams structure result from polymerization with furfuryl alcohol via self-expanding. We further introduce cellulose nanofibrils (CNFs) as a reinforcing agent that eliminates the need for chemical crosslinking during foam formation. CNF forms highly entangled and interconnected nanonetworks, at solid fractions as low as 0.1 wt %, enabling the formation of foams that are ca. 30% stronger and ca. 25% lighter compared to those produced with formaldehyde, currently known as one of the best performers in chemically coupling tannin and furfuryl alcohol. Compared to the those chemically crosslinked, our CNF-reinforced tannin foams display higher thermal degradation temperature (peak shifted upward, by 30–50 °C) and fire resistance (40% decrease in mass loss). Furthermore, we demonstrate partially hydrophobized CNF to tailor the foam microstructure and derived physical–mechanical properties. In sum, green and sustainable foams, stronger, lighter, and more resistant to fire are demonstrated compared to those produced by formaldehyde crosslinking. | eng |
dc.description.sponsorship | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | por |
dc.description.sponsorship | Fundação de Amparo à Pesquisa no Estado do Rio Grande do Sul (FAPERGS) | por |
dc.format.extent | 10303-10310 | por |
dc.language.iso | eng | eng |
dc.publisher | Universidade Federal de São Carlos | por |
dc.relation.ispartof | ACS Sustainable Chemistry & Engineering | por |
dc.rights | Attribution 3.0 Brazil | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/br/ | * |
dc.subject | Nonflammable foams | eng |
dc.subject | Solid foams | eng |
dc.subject | Condensed tannins | eng |
dc.subject | Cellulose nanofibrils | eng |
dc.subject | Nonstructural building materials | eng |
dc.subject | Thermal insulation | eng |
dc.title | Nanocellulose removes the need for chemical crosslinking in tannin-based rigid foams and enhances their strength and fire retardancy | eng |
dc.type | Artigo | por |
dc.publisher.initials | UFSCar | por |
dc.publisher.program | Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM | por |
dc.subject.cnpq | ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA::MATERIAIS NAO METALICOS | por |
dc.description.sponsorshipId | Processo nº 2021/12071-6, Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | por |
dc.description.sponsorshipId | Processo nº 21/2551-0000603-0, Fundação de Amparo à Pesquisa do Estado do RS (FAPERGS) | por |
dc.publisher.address | Câmpus São Carlos | por |
dc.contributor.authorlattes | http://lattes.cnpq.br/9403804691367376 | por |
dc.contributor.authorlattes | http://lattes.cnpq.br/6923877786371495 | por |
dc.contributor.authorlattes | http://lattes.cnpq.br/8821138660917770 | por |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acssuschemeng.2c02678 | por |
dc.publisher.department | Departamento de Engenharia de Materiais - DEMa | por |
dc.citation.volume | 10 | por |
dc.citation.issue | 31 | por |