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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
25/01/2021 |
Data da última atualização: |
10/03/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
LIMA, G. G. de; FERREIRA, B. D.; MATOS, M.; PEREIRA, B. L.; NUGENT, M. J. D.; HANSEL, F. A.; MAGALHAES, W. L. E. |
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. |
Título: |
Effect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Carbohydrate Polymers, v. 245, 116612, Oct. 2020. 10 p. |
DOI: |
https://doi.org/10.1016/j.carbpol.2020.116612 |
Idioma: |
Inglês |
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. |
Palavras-Chave: |
Celulose microfibrilada; Composite hydrogels; Compósitos hidrogéis; Congelar-descongelar; Freeze-thawing; Kraft process; Microfibrillated cellulose; PVA. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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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2. | | LIMA, G. G. de; FERREIRA, B. D.; MATOS, M.; PEREIRA, B. L.; NUGENT, M. J. D.; HANSEL, F. A.; MAGALHAES, W. L. E. Effect of cellulose size-concentration on the structure of polyvinyl alcohol hydrogels. Carbohydrate Polymers, v. 245, 116612, Oct. 2020. 10 p.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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