CHEMICAL PROPERTIES OF TANNIC EXTRACTS FROM BARK OF Pinus oocarpa AND THEIR USE AS ADHESIVE
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
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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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 |
_version_ |
1799874942333878272 |