CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE

Detalhes bibliográficos
Autor(a) principal: Vieira, Michel Cardoso
Data de Publicação: 2016
Outros Autores: Lelis, Roberto Carlos Costa, Rodrigues, Nayara Dorigon
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerne (Online)
Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/958
Resumo: This work evaluated the properties of aqueous extracts obtained from the bark of Pinus oocarpa under addition of sodium sulfite and sodium bisulfite and the possibility of employment of tannins from the bark as an adhesive for bonding wood. After evaluation of the chemical properties of tannic extracts it was decided to employ the extraction with distilled water under addition of / 5% sodium sulfite to prepare for the tannin-formaldehyde adhesive. Adhesive phenol formaldehyde and urea-formaldehyde were modified with 10% tannin Pinus oocarpa and the effect of this addition on the quality of the adhesive was evaluated. The addition from the bark of Pinus oocarpa showed that it is possible to use pure tannin as an adhesive because of its good gluing characteristics. The addition of tannic extract to synthetic adhesives contributed to increase viscosity values. Thus the substitution of synthetic adhesives by tannins is possible only up to 10%. 
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spelling CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVEExtractpolyphenoltanninThis work evaluated the properties of aqueous extracts obtained from the bark of Pinus oocarpa under addition of sodium sulfite and sodium bisulfite and the possibility of employment of tannins from the bark as an adhesive for bonding wood. After evaluation of the chemical properties of tannic extracts it was decided to employ the extraction with distilled water under addition of / 5% sodium sulfite to prepare for the tannin-formaldehyde adhesive. Adhesive phenol formaldehyde and urea-formaldehyde were modified with 10% tannin Pinus oocarpa and the effect of this addition on the quality of the adhesive was evaluated. The addition from the bark of Pinus oocarpa showed that it is possible to use pure tannin as an adhesive because of its good gluing characteristics. The addition of tannic extract to synthetic adhesives contributed to increase viscosity values. Thus the substitution of synthetic adhesives by tannins is possible only up to 10%. CERNECERNE2016-04-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/958CERNE; Vol. 20 No. 1 (2014); 47-54CERNE; v. 20 n. 1 (2014); 47-542317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/958/732Copyright (c) 2016 CERNEinfo:eu-repo/semantics/openAccessVieira, Michel CardosoLelis, Roberto Carlos CostaRodrigues, Nayara Dorigon2016-04-06T14:57:40Zoai:cerne.ufla.br:article/958Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:54:14.494233Cerne (Online) - Universidade Federal de Lavras (UFLA)true
dc.title.none.fl_str_mv CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
title CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
spellingShingle CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
Vieira, Michel Cardoso
Extract
polyphenol
tannin
title_short CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
title_full CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
title_fullStr CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
title_full_unstemmed CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
title_sort CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
author Vieira, Michel Cardoso
author_facet Vieira, Michel Cardoso
Lelis, Roberto Carlos Costa
Rodrigues, Nayara Dorigon
author_role author
author2 Lelis, Roberto Carlos Costa
Rodrigues, Nayara Dorigon
author2_role author
author
dc.contributor.author.fl_str_mv Vieira, Michel Cardoso
Lelis, Roberto Carlos Costa
Rodrigues, Nayara Dorigon
dc.subject.por.fl_str_mv Extract
polyphenol
tannin
topic Extract
polyphenol
tannin
description This work evaluated the properties of aqueous extracts obtained from the bark of Pinus oocarpa under addition of sodium sulfite and sodium bisulfite and the possibility of employment of tannins from the bark as an adhesive for bonding wood. After evaluation of the chemical properties of tannic extracts it was decided to employ the extraction with distilled water under addition of / 5% sodium sulfite to prepare for the tannin-formaldehyde adhesive. Adhesive phenol formaldehyde and urea-formaldehyde were modified with 10% tannin Pinus oocarpa and the effect of this addition on the quality of the adhesive was evaluated. The addition from the bark of Pinus oocarpa showed that it is possible to use pure tannin as an adhesive because of its good gluing characteristics. The addition of tannic extract to synthetic adhesives contributed to increase viscosity values. Thus the substitution of synthetic adhesives by tannins is possible only up to 10%. 
publishDate 2016
dc.date.none.fl_str_mv 2016-04-06
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/958
url https://cerne.ufla.br/site/index.php/CERNE/article/view/958
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://cerne.ufla.br/site/index.php/CERNE/article/view/958/732
dc.rights.driver.fl_str_mv Copyright (c) 2016 CERNE
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2016 CERNE
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv CERNE
CERNE
publisher.none.fl_str_mv CERNE
CERNE
dc.source.none.fl_str_mv CERNE; Vol. 20 No. 1 (2014); 47-54
CERNE; v. 20 n. 1 (2014); 47-54
2317-6342
0104-7760
reponame:Cerne (Online)
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Cerne (Online)
collection Cerne (Online)
repository.name.fl_str_mv Cerne (Online) - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv cerne@dcf.ufla.br||cerne@dcf.ufla.br
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