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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: |
28/05/2019 |
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Data da última atualização: |
30/10/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MALUCELLI, L. C.; MATOS, M. de; JORDÃO, C.; LOMONACO, D.; LACERDA, L. G.; CARVALHO FILHO, M. A. da S.; MAGALHAES, W. L. E. |
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Afiliação: |
Lucca Centa Malucelli, Doutorando da Universidade Positivo; Mailson de Matos, Doutorando da UFPR; Caroline Jordão, Mestranda da UFPR; Diego Lomonaco, UFCE; Luiz Gustavo Lacerda, Pós-graduando da UEPG; Marco Aurélio da Silva Carvalho Filho, Universidade Positivo; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Influence of cellulose chemical pretreatment on energy consumption and viscosity of produced cellulose nanofibers (CNF) and mechanical properties of nanopaper. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Cellulose, v. 26, n. 3, p. 1667-1681, Feb. 2019. |
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DOI: |
10.1007/s10570-018-2161-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Lignocellulosic fibers are the main sources for producing nanocellulose, in which mechanical methods are the most appropriate to achieve a high yield and generate low residue. High energy consumption is the major drawback in these processes, although they are the cheapest way to produce nanocellulose. Chemical pretreatment is one approach to further decrease the overall cost during defibrillation; however, the influence over sample viscosity and mechanical properties is yet to be investigated. Here, we study the influence of chemical pretreatments using NaOH and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) on the mechanical, rheological and structural properties of cellulose nanofibers made from bleached eucalyptus pulp. Modification of samples was evidenced by their respective peaks on FTIR spectra. Sample crystallinity increased after partial hemicellulose and amorphous cellulose removal. In addition, a strong correlation between grinding efficiency and lower energy consumption was observed. However, a mild alkaline treatment may improve fiber strength at the expense of suspension stability and energy consumption. Modified nanofibers presented good potential for enhancing mechanical properties and/or improving suspension stability. |
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Palavras-Chave: |
Disintegration; Nanocellulose; Nanofibra; Pretreatments; Processing energy; TEMPO-oxidation. |
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Thesagro: |
Alcalinidade; Hemicelulose; Viscosidade. |
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Thesaurus Nal: |
Alkalinity; Hemicellulose; Nanofibers; Sodium hydroxide; Viscosity. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02366naa a2200373 a 4500
001 2109354
005 2019-10-30
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1007/s10570-018-2161-0$2DOI
100 1 $aMALUCELLI, L. C.
245 $aInfluence of cellulose chemical pretreatment on energy consumption and viscosity of produced cellulose nanofibers (CNF) and mechanical properties of nanopaper.$h[electronic resource]
260 $c2019
520 $aLignocellulosic fibers are the main sources for producing nanocellulose, in which mechanical methods are the most appropriate to achieve a high yield and generate low residue. High energy consumption is the major drawback in these processes, although they are the cheapest way to produce nanocellulose. Chemical pretreatment is one approach to further decrease the overall cost during defibrillation; however, the influence over sample viscosity and mechanical properties is yet to be investigated. Here, we study the influence of chemical pretreatments using NaOH and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) on the mechanical, rheological and structural properties of cellulose nanofibers made from bleached eucalyptus pulp. Modification of samples was evidenced by their respective peaks on FTIR spectra. Sample crystallinity increased after partial hemicellulose and amorphous cellulose removal. In addition, a strong correlation between grinding efficiency and lower energy consumption was observed. However, a mild alkaline treatment may improve fiber strength at the expense of suspension stability and energy consumption. Modified nanofibers presented good potential for enhancing mechanical properties and/or improving suspension stability.
650 $aAlkalinity
650 $aHemicellulose
650 $aNanofibers
650 $aSodium hydroxide
650 $aViscosity
650 $aAlcalinidade
650 $aHemicelulose
650 $aViscosidade
653 $aDisintegration
653 $aNanocellulose
653 $aNanofibra
653 $aPretreatments
653 $aProcessing energy
653 $aTEMPO-oxidation
700 1 $aMATOS, M. de
700 1 $aJORDÃO, C.
700 1 $aLOMONACO, D.
700 1 $aLACERDA, L. G.
700 1 $aCARVALHO FILHO, M. A. da S.
700 1 $aMAGALHAES, W. L. E.
773 $tCellulose$gv. 26, n. 3, p. 1667-1681, Feb. 2019.
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Embrapa Florestas (CNPF) |
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| Registros recuperados : 12 | |
| 7. |  | CRISOSTOMO, L. A.; LIMA, A. A. C.; AQUINO, A. R. L. de; OLIVEIRA, F. N. S.; FROTA, P. C. E. Adubação e nutrição mineral. In: ARAÚJO, J. P. P. de (Ed.). Caju: o produtor pergunta, a Embrapa responde. 2.ed. rev. e atualiz. Brasília, DF: Embrapa, 2015. Cap. 3, p. 41-56.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 9. | | FROTA, P. C. E.; LIMA, A. A. C. L.; CRISOSTOMO, L. A.; AQUINO, A. R. L. de. Aspectos do solo, clima, fenologia e produção. In: ARAÚJO, J. P. P. de (Ed.). Caju: o produtor pergunta, a Embrapa responde. 2.ed. rev. e atualiz. Brasília, DF: Embrapa, 2015. Cap. 2 p. 33-40.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 12. | | RAMOS, A. D.; BLEICHER, E.; FREIRE, F. das C. O.; CARDOSO, J. E.; PARENTE, J. I. G.; BARROS, L. de M.; CRISOSTOMO, L. A.; FROTA, P. C. E.; CORRÊA, M. P. F.; PESSOA, P. F. A. P.; MELO, Q. M. S.; OLIVEIRA, V. H. de. A cultura do caju. Brasília, DF: Embrapa-SPI; Fortaleza: EMBRAPA, CNPAT, 1996. 93 p. (Coleção Plantar, 34; Série vermelha. Fruteiras).| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 12 | |
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