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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
11/10/2013 |
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Data da última atualização: |
11/10/2013 |
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Autoria: |
AURIOL, P. |
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Título: |
Quelques aspects pratiques du controle "formager" des vaches laitieres. |
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Ano de publicação: |
1959 |
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Fonte/Imprenta: |
Proceedings of International Dairy Congress, 15., 1959. p. 1907-1913. |
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Idioma: |
Francês |
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Thesagro: |
Vaca Leiteira. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00374naa a2200121 a 4500
001 1968343
005 2013-10-11
008 1959 bl --- 0-- u #d
100 1 $aAURIOL, P.
245 $aQuelques aspects pratiques du controle "formager" des vaches laitieres.
260 $c1959
650 $aVaca Leiteira
773 $tProceedings of International Dairy Congress, 15., 1959. p. 1907-1913.
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Registro original: |
Embrapa Amazônia Ocidental (CPAA) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
06/11/2019 |
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Data da última atualização: |
10/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
DELUCIS, R. de A.; KERCHE, E. F.; GATTO, D. A.; MAGALHAES, W. L. E.; PETZHOLD, C. L.; AMICO, S. C. |
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Afiliação: |
RAFAEL DE AVILA DELUCIS, UNIVERSIDADE FEDERAL DE PELOTAS; EDUARDO FISCHER KERCHE, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; DARCI ALBERTO GATTO, UNIVERSIDADE DE PELOTAS; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; CESAR LIBERATO PETZHOLD, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; SANDRO CAMPOS AMICO, UNIVERSIDADE FEDERAL DE PELOTAS. |
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Título: |
Surface response and photodegradation performance of bio-based polyurethane-forest derivatives foam composites. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Polymer Testing, v. 80, article 106102, Dec. 2019. |
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ISBN: |
10.1016/j.polymertesting.2019.106102 |
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Idioma: |
Inglês |
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Conteúdo: |
Rigid polyurethane (PU) foams are popular expanded polymers mostly due to their thermal and mechanical properties, although aesthetical features and photodegradation resistance are also of interest for certain applications. In this study, four different forest-based wastes (wood, bark, kraft lignin and paper sludge) were incorporated into rigid PU foams and their surface response and photodegradation resistance were investigated. The rigid foams were prepared via free rise pouring method and later aged by UV radiation. Their colour and specular gloss were evaluated according to the CIELab method. Contact angle measurements and morphological characterization by optical (OM) and scanning electron microscopy (SEM) were also carried out. The forestbased fillers induced different colour patterns on the rigid foams and their photodegradation yielded a decrease in L* and specular gloss and an increase in a* and b*, especially over the first 20 days of UV-exposure. These effects were accompanied by an increase in surface wettability and weakening of the foam structure. Also, the foams of darker colour (i.e. with bark and kraft lignin fillers) presented greater photodegradation resistance. |
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Palavras-Chave: |
Biofoam; CIELAB method; Kraft lignin; Paper sludge; Polyurethane foam. |
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Thesaurus NAL: |
Composite polymers; Polyurethanes. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01978naa a2200265 a 4500
001 2113954
005 2019-12-10
008 2019 bl uuuu u00u1 u #d
100 1 $aDELUCIS, R. de A.
245 $aSurface response and photodegradation performance of bio-based polyurethane-forest derivatives foam composites.$h[electronic resource]
260 $c2019
520 $aRigid polyurethane (PU) foams are popular expanded polymers mostly due to their thermal and mechanical properties, although aesthetical features and photodegradation resistance are also of interest for certain applications. In this study, four different forest-based wastes (wood, bark, kraft lignin and paper sludge) were incorporated into rigid PU foams and their surface response and photodegradation resistance were investigated. The rigid foams were prepared via free rise pouring method and later aged by UV radiation. Their colour and specular gloss were evaluated according to the CIELab method. Contact angle measurements and morphological characterization by optical (OM) and scanning electron microscopy (SEM) were also carried out. The forestbased fillers induced different colour patterns on the rigid foams and their photodegradation yielded a decrease in L* and specular gloss and an increase in a* and b*, especially over the first 20 days of UV-exposure. These effects were accompanied by an increase in surface wettability and weakening of the foam structure. Also, the foams of darker colour (i.e. with bark and kraft lignin fillers) presented greater photodegradation resistance.
650 $aComposite polymers
650 $aPolyurethanes
653 $aBiofoam
653 $aCIELAB method
653 $aKraft lignin
653 $aPaper sludge
653 $aPolyurethane foam
700 1 $aKERCHE, E. F.
700 1 $aGATTO, D. A.
700 1 $aMAGALHAES, W. L. E.
700 1 $aPETZHOLD, C. L.
700 1 $aAMICO, S. C.
773 $tPolymer Testing$gv. 80, article 106102, Dec. 2019.
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Embrapa Florestas (CNPF) |
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