| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Suínos e Aves. |
|
Data corrente: |
12/05/2020 |
|
Data da última atualização: |
12/05/2020 |
|
Tipo da produção científica: |
Documentos |
|
Autoria: |
PEREIRA, M. L.; CARDOSO, L. S. |
|
Título: |
Annual Report 2019. |
|
Ano de publicação: |
2020 |
|
Fonte/Imprenta: |
Concórdia: Embrapa Suínos e Aves, 2020. |
|
Páginas: |
22 p. |
|
Série: |
(Embrapa Suínos e Aves. Documentos, 210). |
|
ISSN: |
0101-6245 |
|
Idioma: |
Inglês |
|
Palavras-Chave: |
Embrapa Suínos e Aves; Embrapa Swine and Poultry; Relatório. |
|
Thesagro: |
Inovação; Pesquisa; Transferência de Tecnologia. |
|
Thesaurus Nal: |
agricultural research; aviculture; swine; technology transfer. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/212934/1/AnnualRep2019.pdf
|
|
Marc: |
LEADER 00735nam a2200265 a 4500
001 2122269
005 2020-05-12
008 2020 bl uuuu u0uu1 u #d
022 $a0101-6245
100 1 $aPEREIRA, M. L.
245 $aAnnual Report 2019.$h[electronic resource]
260 $aConcórdia: Embrapa Suínos e Aves$c2020
300 $a22 p.
490 $a(Embrapa Suínos e Aves. Documentos, 210).
650 $aagricultural research
650 $aaviculture
650 $aswine
650 $atechnology transfer
650 $aInovação
650 $aPesquisa
650 $aTransferência de Tecnologia
653 $aEmbrapa Suínos e Aves
653 $aEmbrapa Swine and Poultry
653 $aRelatório
700 1 $aCARDOSO, L. S.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Suínos e Aves (CNPSA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
06/09/2017 |
|
Data da última atualização: |
05/01/2018 |
|
Tipo da produção científica: |
Artigo em Anais de Congresso |
|
Autoria: |
CLARO, F. C.; MATOS, M. de; MAGALHAES, W. L. E. |
|
Afiliação: |
Francine C. Claro, UFPR; Mailson de Matos, Estudantes PHD, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
|
Título: |
Effect of the hemicellulose in the properties of nanopaper. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON WOOD, FIBRE AND PULPING CHEMISTRY, 19., 2017, Porto Seguro. Proceedings. Viçosa, MG: UFV, 2017. |
|
Páginas: |
p. 393-397. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The foldable, low thermal expansion, and optically transparent are main properties of paper produced with cellulose nanofibers (nanopaper), being able to be used ifl the development of flexible circuit technologies. In this context, this work evaluates the importance of hemicellulose in the properties of nanofiber paper (NFP). The hemicellulose extraction from Pinus sp bleached cellulose pulp was performed with NaOH 17.5% for 1.5 h. Thereafter, the pulp was washed with 8.3% NaOH, then was add 10% acetic acid until neutralization, and washed with water. The nanofibrils were obtained by mechanical defibrillation in a Super Masscoloider Masuko Sangyo mill. The NFP with the grammage of 40 and 50 g/m2 were produced by filtration and drying under pressure. The extraction process reduced 80% of xylose, 40% of mannose and 40% of galactose compared of the bleached cellulosic pulp. The NFPs with around 15% of hemicellulose are homogeneous and transparent, the interstices between the fibers, observed by scanning electron microscopy, are small enough to avoid light scattering, making the cellulosic material transparent. The NFP of 40 and 50 g/m2 had a thickness of 45 J..Im,water absorption of 63 and 34 g/m2, respectively. They did not present air permeability. NFP of 40 and 50 g/m2 without hemicellulose had a thickness of 76 and 87 um, water absorption of 128 g/m2 and air permeability of 202 and 384 s/100 em", respectively. The spaces created by the coalescence of the cellulose nanofibrils after the extraction of the hemicellulose result in the dispersion of the light and consequently in the opacity of the NFP. Extraction of hemicellulose reduced the tensile and bursting strength by 80%. Therefore, hemicellulose acts as an inhibitor of the coalescence of microfibrils, providing adhesion and increase of the mechanical properties. MenosThe foldable, low thermal expansion, and optically transparent are main properties of paper produced with cellulose nanofibers (nanopaper), being able to be used ifl the development of flexible circuit technologies. In this context, this work evaluates the importance of hemicellulose in the properties of nanofiber paper (NFP). The hemicellulose extraction from Pinus sp bleached cellulose pulp was performed with NaOH 17.5% for 1.5 h. Thereafter, the pulp was washed with 8.3% NaOH, then was add 10% acetic acid until neutralization, and washed with water. The nanofibrils were obtained by mechanical defibrillation in a Super Masscoloider Masuko Sangyo mill. The NFP with the grammage of 40 and 50 g/m2 were produced by filtration and drying under pressure. The extraction process reduced 80% of xylose, 40% of mannose and 40% of galactose compared of the bleached cellulosic pulp. The NFPs with around 15% of hemicellulose are homogeneous and transparent, the interstices between the fibers, observed by scanning electron microscopy, are small enough to avoid light scattering, making the cellulosic material transparent. The NFP of 40 and 50 g/m2 had a thickness of 45 J..Im,water absorption of 63 and 34 g/m2, respectively. They did not present air permeability. NFP of 40 and 50 g/m2 without hemicellulose had a thickness of 76 and 87 um, water absorption of 128 g/m2 and air permeability of 202 and 384 s/100 em", respectively. The spaces created by the coalescence of the cellulose nanofibr... Mostrar Tudo |
|
Palavras-Chave: |
Air permeability; Bleached pulp; Nanofibra; Permeabilidade do ar. |
|
Thesagro: |
Hemicelulose. |
|
Thesaurus NAL: |
Hemicellulose; Nanofibers; Tensile strength. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163592/1/2017-Washington-ISWFPC-Effect.pdf
|
|
Marc: |
LEADER 02596nam a2200241 a 4500
001 2075217
005 2018-01-05
008 2017 bl uuuu u00u1 u #d
100 1 $aCLARO, F. C.
245 $aEffect of the hemicellulose in the properties of nanopaper.$h[electronic resource]
260 $aIn: INTERNATIONAL SYMPOSIUM ON WOOD, FIBRE AND PULPING CHEMISTRY, 19., 2017, Porto Seguro. Proceedings. Viçosa, MG: UFV$c2017
300 $ap. 393-397.
520 $aThe foldable, low thermal expansion, and optically transparent are main properties of paper produced with cellulose nanofibers (nanopaper), being able to be used ifl the development of flexible circuit technologies. In this context, this work evaluates the importance of hemicellulose in the properties of nanofiber paper (NFP). The hemicellulose extraction from Pinus sp bleached cellulose pulp was performed with NaOH 17.5% for 1.5 h. Thereafter, the pulp was washed with 8.3% NaOH, then was add 10% acetic acid until neutralization, and washed with water. The nanofibrils were obtained by mechanical defibrillation in a Super Masscoloider Masuko Sangyo mill. The NFP with the grammage of 40 and 50 g/m2 were produced by filtration and drying under pressure. The extraction process reduced 80% of xylose, 40% of mannose and 40% of galactose compared of the bleached cellulosic pulp. The NFPs with around 15% of hemicellulose are homogeneous and transparent, the interstices between the fibers, observed by scanning electron microscopy, are small enough to avoid light scattering, making the cellulosic material transparent. The NFP of 40 and 50 g/m2 had a thickness of 45 J..Im,water absorption of 63 and 34 g/m2, respectively. They did not present air permeability. NFP of 40 and 50 g/m2 without hemicellulose had a thickness of 76 and 87 um, water absorption of 128 g/m2 and air permeability of 202 and 384 s/100 em", respectively. The spaces created by the coalescence of the cellulose nanofibrils after the extraction of the hemicellulose result in the dispersion of the light and consequently in the opacity of the NFP. Extraction of hemicellulose reduced the tensile and bursting strength by 80%. Therefore, hemicellulose acts as an inhibitor of the coalescence of microfibrils, providing adhesion and increase of the mechanical properties.
650 $aHemicellulose
650 $aNanofibers
650 $aTensile strength
650 $aHemicelulose
653 $aAir permeability
653 $aBleached pulp
653 $aNanofibra
653 $aPermeabilidade do ar
700 1 $aMATOS, M. de
700 1 $aMAGALHAES, W. L. E.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
