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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: |
LEADER 01986naa a2200301 a 4500
001 2129523
005 2021-03-10
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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| 7. |  | NASCIMENTO JUNIOR, A. do; MORAES, M. C. de; CHINI, S. O.; BETTO, M. S.; PACHECO, H. Considerações ao ensaio de trigo do MAPA conduzido na Embrapa Trigo em 2009. In: REUNIÃO DA COMISSÃO BRASILEIRA DE PESQUISA DE TRIGO E TRITICALE, 4., 2010, Cascavel. Ata e resumos... Cascavel: Comissão Brasileira de Pesquisa de Trigo e Triticale: Coodetec, 2010. 3 p. 1 CD ROM. Organizado por Volmir Sergio Marchioro, Francisco de Assis Franco, Andrelise Daltoé| Tipo: Artigo em Anais de Congresso |
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| 9. | | PACHECO, H. do A.; SANTOS, A. D. dos; CHAIM, M. L.; FILETO, R.; FIGUEIREDO, K.; PEDROSO JUNIOR, M. Cartilha Azul: uma proposta de manual para desenvolvimento de software. In: WORKSHOP INTERNO DO CNPTIA, 1., 1995, Campinas. Trabalhos apresentados... Campinas: EMBRAPA-CNPTIA, 1995. Não paginado.| Biblioteca(s): Embrapa Agricultura Digital. |
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