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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
26/06/2024 |
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Data da última atualização: |
26/06/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIMA, G. G. de; AGGIO, B.; MATOS, M.; LIMA, T. A. M. de; PEREIRA, B. L.; PEDRO, A. C.; MAGALHAES, W. L. E. |
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Afiliação: |
GABRIEL G. DE LIMA, UNIVERSIDADE FEDERAL DO PARANÁ; BRUNO AGGIO, UNIVERSIDADE FEDERAL DO PARANÁ; MAILSON MATOS, PONTIFICIA UNIVERSIDADE CATÓLICA DO PARANÁ; TIELIDY A. M. DE LIMA, TECHNOLOGICAL UNIVERSITY OF THE SHANNON; BRUNO L. PEREIRA, SENAI INNOVATION INSTITUTE IN ELECTROCHEMISTRY; ALESSANDRA CRISTINA PEDRO, FUNDAÇÃO DE AMPARO A PESQUISA DO ESTADO DE GOIÁS; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Cryoslash as an effective pre-treatment to obtain nanofibrillated cellulose using ultra-fine friction grinder with kraft pulp. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Nordic Pulp & Paper Research Journal, v. 38, n. 2, p. 333-341, 2023. |
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ISSN: |
0283-2631 |
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DOI: |
http://dx.doi.org/10.1515/npprj-2022-0091 |
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Idioma: |
Inglês |
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Conteúdo: |
Approaches to obtain nanocellulose have been extensively suggested, and among the most competitive methodologies includes mechanical defibrillation, which results in a nanocellulose gel suspension that can be used in a variety of applications. However, standard procedures results ininhomogeneous fibre sizes due to its physical approach. Pretreatments have been suggested, such as enzymes, but their cost is a disadvantage. In this work, we suggest the use of cryoslash for bleach kraft pulp using a simple methodology of embedding the dry kraft pulp in distilled water following by freezing at -80 °C, which was slashed using a common blender and submitted to an ultra-fine friction grinder. Samples were studied at various grinding steps 5, 15, 30, 60 and 120. Overall, the energy difference required to defibrillate with cryoslash was ~3.26 kWh/kg at 30 steps and ~6 at 120 steps, which was similar to enzymatic pre-treatment with nanofibrils significantly smaller. Cryoslash presented a unique C-H in plane structure from nanocellulose, related to a decrease in average size of fibrils, while crystallinity and thermal properties of nanocellulose remained stable at 60 steps, but mechanical properties increased until 120 steps along with the transmittance values related to the energy consumption curve. |
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Palavras-Chave: |
Defibrillation; Desfibrilação mecânica; Microfluoridizer; Nanocellulose; Nanocelulose; Polpa kraft; Tratamentos. |
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Thesaurus Nal: |
Kraft pulp. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02271naa a2200313 a 4500
001 2165161
005 2024-06-26
008 2023 bl uuuu u00u1 u #d
022 $a0283-2631
024 7 $ahttp://dx.doi.org/10.1515/npprj-2022-0091$2DOI
100 1 $aLIMA, G. G. de
245 $aCryoslash as an effective pre-treatment to obtain nanofibrillated cellulose using ultra-fine friction grinder with kraft pulp.$h[electronic resource]
260 $c2023
520 $aApproaches to obtain nanocellulose have been extensively suggested, and among the most competitive methodologies includes mechanical defibrillation, which results in a nanocellulose gel suspension that can be used in a variety of applications. However, standard procedures results ininhomogeneous fibre sizes due to its physical approach. Pretreatments have been suggested, such as enzymes, but their cost is a disadvantage. In this work, we suggest the use of cryoslash for bleach kraft pulp using a simple methodology of embedding the dry kraft pulp in distilled water following by freezing at -80 °C, which was slashed using a common blender and submitted to an ultra-fine friction grinder. Samples were studied at various grinding steps 5, 15, 30, 60 and 120. Overall, the energy difference required to defibrillate with cryoslash was ~3.26 kWh/kg at 30 steps and ~6 at 120 steps, which was similar to enzymatic pre-treatment with nanofibrils significantly smaller. Cryoslash presented a unique C-H in plane structure from nanocellulose, related to a decrease in average size of fibrils, while crystallinity and thermal properties of nanocellulose remained stable at 60 steps, but mechanical properties increased until 120 steps along with the transmittance values related to the energy consumption curve.
650 $aKraft pulp
653 $aDefibrillation
653 $aDesfibrilação mecânica
653 $aMicrofluoridizer
653 $aNanocellulose
653 $aNanocelulose
653 $aPolpa kraft
653 $aTratamentos
700 1 $aAGGIO, B.
700 1 $aMATOS, M.
700 1 $aLIMA, T. A. M. de
700 1 $aPEREIRA, B. L.
700 1 $aPEDRO, A. C.
700 1 $aMAGALHAES, W. L. E.
773 $tNordic Pulp & Paper Research Journal$gv. 38, n. 2, p. 333-341, 2023.
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Registro original: |
Embrapa Florestas (CNPF) |
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