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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
25/01/2021 |
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Data da última atualização: |
10/03/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIMA, G. G. de; FERREIRA, B. D.; MATOS, M.; PEREIRA, B. L.; NUGENT, M. J. D.; HANSEL, F. A.; MAGALHAES, W. L. E. |
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Afiliação: |
GABRIEL GOETTEN DE LIMA, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais, UFPR; BRUNO DIAS FERREIRA, UFPR; MAILSON MATOS, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais, UFPR; BRUNO LEANDRO PEREIRA, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais, UFPR; MICHAEL J. D. NUGENT, Materials Research Institute, Athlone Institute of Technology; FABRICIO AUGUSTO HANSEL, CNPF; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Effect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Carbohydrate Polymers, v. 245, 116612, Oct. 2020. 10 p. |
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DOI: |
https://doi.org/10.1016/j.carbpol.2020.116612 |
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Idioma: |
Inglês |
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Conteúdo: |
Microfibrillated cellulose as a reinforcement agent has been investigated extensively due to their unique characteristics, which can reorder the structure of polymers and hydrogels leading to improved mechanical properties with minimal disadvantages in terms of the targeted original applications. However, effect of using a macro- to a micro-fibrillated cellulose onto polyvinyl alcohol hydrogels is still unknown, because of the unique ability for both to be produced as hydrogels from freeze-thawing mechanisms ? hydrogen bonding - there is a potential synergism. Therefore, macro and microfibrillated kraft bleached paper was synthesised at various concentrations on polyvinyl alcohol hydrogels. The overall effect presented a strong interaction between both compounds but it was increased with macrofibrillated cellulose. Increase in crystallinity was also observed with a macro-sized fibre without variation on tensile elastic modulus but an overall improvement was perceived on thermal properties and a slower swelling rate with a microfibrillated cellulose. |
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Palavras-Chave: |
Celulose microfibrilada; Composite hydrogels; Compósitos hidrogéis; Congelar-descongelar; Freeze-thawing; Kraft process; Microfibrillated cellulose; PVA. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
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001 2129523
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008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.carbpol.2020.116612$2DOI
100 1 $aLIMA, G. G. de
245 $aEffect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels.$h[electronic resource]
260 $c2020
520 $aMicrofibrillated cellulose as a reinforcement agent has been investigated extensively due to their unique characteristics, which can reorder the structure of polymers and hydrogels leading to improved mechanical properties with minimal disadvantages in terms of the targeted original applications. However, effect of using a macro- to a micro-fibrillated cellulose onto polyvinyl alcohol hydrogels is still unknown, because of the unique ability for both to be produced as hydrogels from freeze-thawing mechanisms ? hydrogen bonding - there is a potential synergism. Therefore, macro and microfibrillated kraft bleached paper was synthesised at various concentrations on polyvinyl alcohol hydrogels. The overall effect presented a strong interaction between both compounds but it was increased with macrofibrillated cellulose. Increase in crystallinity was also observed with a macro-sized fibre without variation on tensile elastic modulus but an overall improvement was perceived on thermal properties and a slower swelling rate with a microfibrillated cellulose.
653 $aCelulose microfibrilada
653 $aComposite hydrogels
653 $aCompósitos hidrogéis
653 $aCongelar-descongelar
653 $aFreeze-thawing
653 $aKraft process
653 $aMicrofibrillated cellulose
653 $aPVA
700 1 $aFERREIRA, B. D.
700 1 $aMATOS, M.
700 1 $aPEREIRA, B. L.
700 1 $aNUGENT, M. J. D.
700 1 $aHANSEL, F. A.
700 1 $aMAGALHAES, W. L. E.
773 $tCarbohydrate Polymers$gv. 245, 116612, Oct. 2020. 10 p.
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Embrapa Florestas (CNPF) |
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| Registros recuperados : 54 | |
| 11. |  | MORAES, E. de; CANTO, A. do C.; TEIXEIRA, L. B. Capacidade de suporte do capim quicuio da Amazônia (Brachiaria humidicola) durante a época seca, Manaus, AM. In: REUNIÃO DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 15., 1978, Belém, PA. Anais... Belém, PA: Sociedade Brasileira de Zootecnia, 1978. p. 325.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| 17. | | TEIXEIRA, L. B.; CANTO, A. do C.; MORAES, E. de. Níveis de nitrogênio e fósforo em capim elefante (Pennisetum purpureum Schum), Manaus - AM. In: REUNIÃO DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 15., 1978, Belém, PA. Anais... Belém, PA: Sociedade Brasileira de Zootecnia, 1978. p. 343-344.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| Registros recuperados : 54 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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