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| Registros recuperados : 47 | |
| Registros recuperados : 47 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
04/03/2021 |
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Data da última atualização: |
12/04/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ARTNER, M. A.; CADEMARTORI, P. H. G. de; AVELINO, F.; LEMONACO, D.; MAGALHAES, W. L. E. |
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Afiliação: |
Mirela Angelita Artner, PIPE - UFPR; Pedro Henrique Gonzalez de Cademartori, UFPR; Francisco Avelino, Instituto Federal de Educação, Ciência e Tecnologia do Ceará; Diego Lomonaco, Universidade Federal do Ceará; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
A novel design for nanocellulose reinforced urea-formaldehyde resin: a breakthrough in amino resin synthesis and biocomposite manufacturing. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Cellulose, v. 28, n. 6, p. 3435–3450, Apr. 2021. |
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DOI: |
https://doi.org/10.1007/s10570-021-03739-4 |
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Idioma: |
Inglês |
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Conteúdo: |
Urea?formaldehyde (UF) resins are often reinforced with natural fibers or nanostructures such as cellulose microfibrils (CMFs) to improve their mechanical and physical properties in wood panels. However, the high-water content in these suspensions is a limitation on applications in thermosetting resins. The innovative technology investigated here consists of the in-situ production of a methanediol-based suspension of CMFs through a mechanical process and its incorporation during resin synthesis. We sought to maintain the physicochemical properties and the basic chemical composition of the resin. The synergy between the resin and CMFs provided a shielding effect and a greater storage modulus (E?). We demonstrate that this approach is robust through standard viscoelastic, physical, and mechanical tests. Likewise, a methanediol-based CMF suspension used to synthesize UF resin was effective to reduce formaldehyde emission during the resin cure reactions. Finally, the bio-based composites manufactured with this UF resin containing CMF had better performance due to increased internal bond strength by up to 15%, reduced water absorption by up to 8%, and reduced formaldehyde emission by 30% at environmental temperature. |
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Palavras-Chave: |
Celulose microfibrilada; Microfibrillated cellulose; Nanocellulose; Nanocelulose; Urea formaldehyde resin; Ureia formaldeído; Wood panels. |
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Thesagro: |
Painel de Madeira; Resina. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02168naa a2200289 a 4500
001 2130463
005 2021-04-12
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s10570-021-03739-4$2DOI
100 1 $aARTNER, M. A.
245 $aA novel design for nanocellulose reinforced urea-formaldehyde resin$ba breakthrough in amino resin synthesis and biocomposite manufacturing.$h[electronic resource]
260 $c2021
520 $aUrea?formaldehyde (UF) resins are often reinforced with natural fibers or nanostructures such as cellulose microfibrils (CMFs) to improve their mechanical and physical properties in wood panels. However, the high-water content in these suspensions is a limitation on applications in thermosetting resins. The innovative technology investigated here consists of the in-situ production of a methanediol-based suspension of CMFs through a mechanical process and its incorporation during resin synthesis. We sought to maintain the physicochemical properties and the basic chemical composition of the resin. The synergy between the resin and CMFs provided a shielding effect and a greater storage modulus (E?). We demonstrate that this approach is robust through standard viscoelastic, physical, and mechanical tests. Likewise, a methanediol-based CMF suspension used to synthesize UF resin was effective to reduce formaldehyde emission during the resin cure reactions. Finally, the bio-based composites manufactured with this UF resin containing CMF had better performance due to increased internal bond strength by up to 15%, reduced water absorption by up to 8%, and reduced formaldehyde emission by 30% at environmental temperature.
650 $aPainel de Madeira
650 $aResina
653 $aCelulose microfibrilada
653 $aMicrofibrillated cellulose
653 $aNanocellulose
653 $aNanocelulose
653 $aUrea formaldehyde resin
653 $aUreia formaldeído
653 $aWood panels
700 1 $aCADEMARTORI, P. H. G. de
700 1 $aAVELINO, F.
700 1 $aLEMONACO, D.
700 1 $aMAGALHAES, W. L. E.
773 $tCellulose$gv. 28, n. 6, p. 3435–3450, Apr. 2021.
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