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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
30/09/2022 |
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Data da última atualização: |
10/12/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MASCARENHAS, A. R. P.; MENDONÇA, M. C.; DIAS, M. C.; MARTINS, M. A.; MELO, R. R. de; DAMASIO, R. A. P.; TONOLI, G. H. D. |
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Afiliação: |
MARIA ALICE MARTINS, CNPDIA. |
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Título: |
Production of cellulose micro/nanofibrils with sodium silicate: impact on energy consumption, microstructure, crystallinity and stability of suspensions. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Nordic Pulp & Paper Research Journal, v. 37, n. 4, 2022. |
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Páginas: |
686-701 |
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ISSN: |
0283-2631 |
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DOI: |
https://doi.org/10.1515/npprj-2022-0052 |
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Idioma: |
Inglês |
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Conteúdo: |
Pre-treatments reduce energy consumption for the production of cellulose micro/nanofibrils (MFC/CNF).The objective of this work was to study sodium silicate(Na2SiO3) solutions as pre-treatment for Eucalyptus sp.and Pinus sp. pulps. The treatments were identified asEUC SS 5 % and EUC SS 10 % when 5 and 10 % Na2SiO3were used, respectively. The treatments for Pinus sp. pulp were identified as PIN SS 5 % and PIN SS 10 %, andthe untreated pulps as EUC control and PIN control. Thelowest hemicellulose content was obtained for PIN SS10 %. EUC SS 10 % showed the highest WRV values. EUCSS 5 % (∼ 4100 kWh/t) and EUC SS 10 % (∼ 4200 kWh/t)showed the lowest energy consumption. The pre-treatedMFC/CNF showed diameters below 45 nm. The lowestviscosity was obtained for EUC SS 5 % (5.5 cP) and thehighest for PIN control (7.7 cP), respectively. The zeta potential indicated moderate stability of the suspensions(−24 ∼ −18 mV). Na2SiO3 showed efficiency for MFC/CNF production due to reduced energy consumption and better individualization. The suspensions have compatible characteristics for application as a stabilizer of colloidal systems and reinforcement of composites. |
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Palavras-Chave: |
Cell wall; Cellulose nanofbrils; Microfbrillated cellulose (MFC). |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02052naa a2200265 a 4500
001 2147022
005 2024-12-10
008 2022 bl uuuu u00u1 u #d
022 $a0283-2631
024 7 $ahttps://doi.org/10.1515/npprj-2022-0052$2DOI
100 1 $aMASCARENHAS, A. R. P.
245 $aProduction of cellulose micro/nanofibrils with sodium silicate$bimpact on energy consumption, microstructure, crystallinity and stability of suspensions.$h[electronic resource]
260 $c2022
300 $a686-701
520 $aPre-treatments reduce energy consumption for the production of cellulose micro/nanofibrils (MFC/CNF).The objective of this work was to study sodium silicate(Na2SiO3) solutions as pre-treatment for Eucalyptus sp.and Pinus sp. pulps. The treatments were identified asEUC SS 5 % and EUC SS 10 % when 5 and 10 % Na2SiO3were used, respectively. The treatments for Pinus sp. pulp were identified as PIN SS 5 % and PIN SS 10 %, andthe untreated pulps as EUC control and PIN control. Thelowest hemicellulose content was obtained for PIN SS10 %. EUC SS 10 % showed the highest WRV values. EUCSS 5 % (∼ 4100 kWh/t) and EUC SS 10 % (∼ 4200 kWh/t)showed the lowest energy consumption. The pre-treatedMFC/CNF showed diameters below 45 nm. The lowestviscosity was obtained for EUC SS 5 % (5.5 cP) and thehighest for PIN control (7.7 cP), respectively. The zeta potential indicated moderate stability of the suspensions(−24 ∼ −18 mV). Na2SiO3 showed efficiency for MFC/CNF production due to reduced energy consumption and better individualization. The suspensions have compatible characteristics for application as a stabilizer of colloidal systems and reinforcement of composites.
653 $aCell wall
653 $aCellulose nanofbrils
653 $aMicrofbrillated cellulose (MFC)
700 1 $aMENDONÇA, M. C.
700 1 $aDIAS, M. C.
700 1 $aMARTINS, M. A.
700 1 $aMELO, R. R. de
700 1 $aDAMASIO, R. A. P.
700 1 $aTONOLI, G. H. D.
773 $tNordic Pulp & Paper Research Journal$gv. 37, n. 4, 2022.
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| 1. |  | RODRIGUES, A. L. P.; SAMPAIO, I. B. M.; CARNEIRO, J. da C. Degradabilidade da matéria seca de forrageiras tropicais (Andropogon gayanus cv. Planaltina, acessos de Brachiaria brizantha, Cenchrus ciliaris e Panicum maximum) em três épocas de corte (21, 42 e 63 dias). In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 38., 2001, Piracicaba. A produção animal na visão dos brasileiros: anais. Piracicaba: Sociedade Brasileira de Zootecnia, 2001.| Tipo: Artigo em Anais de Congresso |
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