Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Cerne (Online) |
Texto Completo: | https://cerne.ufla.br/site/index.php/CERNE/article/view/361 |
Resumo: | The work objectived to study the reactivity of the tannins of the bark of Eucalyptus grandis to paraformaldehyde at different pH values, time of hydrolisis and sulphitezation and to produce tannics adhesives for wood. It was observed that the best gel-time was obtained with tannins sulphited at pH 3, with 3% of sulphite and time of reation of 90 minutes. Sulphited tannins in pH equal to 2 had the worst results, therefore, adesives with pH of formulations lower than 3 should not be used. The best tannic adhesive was that produced with tannins hydrolised and sulphited to which were added 5% of extender and 5% of filler. Adhesives produced with sulphited tannins presented the worst results. |
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Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVESTanninsadhesivesEucalyptus grandisThe work objectived to study the reactivity of the tannins of the bark of Eucalyptus grandis to paraformaldehyde at different pH values, time of hydrolisis and sulphitezation and to produce tannics adhesives for wood. It was observed that the best gel-time was obtained with tannins sulphited at pH 3, with 3% of sulphite and time of reation of 90 minutes. Sulphited tannins in pH equal to 2 had the worst results, therefore, adesives with pH of formulations lower than 3 should not be used. The best tannic adhesive was that produced with tannins hydrolised and sulphited to which were added 5% of extender and 5% of filler. Adhesives produced with sulphited tannins presented the worst results.CERNECERNE2015-09-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/361CERNE; Vol. 7 No. 1 (2001); 001-009CERNE; v. 7 n. 1 (2001); 001-0092317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAporhttps://cerne.ufla.br/site/index.php/CERNE/article/view/361/304Copyright (c) 2015 CERNEinfo:eu-repo/semantics/openAccessCarneiro, Angélica de Cássia O.Vital, Benedito RochaPimenta, Alexandre SantosMori, Fábio Akira2015-10-22T09:05:00Zoai:cerne.ufla.br:article/361Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:53:46.171772Cerne (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
title |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
spellingShingle |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES Carneiro, Angélica de Cássia O. Tannins adhesives Eucalyptus grandis |
title_short |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
title_full |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
title_fullStr |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
title_full_unstemmed |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
title_sort |
Eucalyptus grandis BARK TANNINS REATIVITY TO PRODUCE ADHESIVES |
author |
Carneiro, Angélica de Cássia O. |
author_facet |
Carneiro, Angélica de Cássia O. Vital, Benedito Rocha Pimenta, Alexandre Santos Mori, Fábio Akira |
author_role |
author |
author2 |
Vital, Benedito Rocha Pimenta, Alexandre Santos Mori, Fábio Akira |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Carneiro, Angélica de Cássia O. Vital, Benedito Rocha Pimenta, Alexandre Santos Mori, Fábio Akira |
dc.subject.por.fl_str_mv |
Tannins adhesives Eucalyptus grandis |
topic |
Tannins adhesives Eucalyptus grandis |
description |
The work objectived to study the reactivity of the tannins of the bark of Eucalyptus grandis to paraformaldehyde at different pH values, time of hydrolisis and sulphitezation and to produce tannics adhesives for wood. It was observed that the best gel-time was obtained with tannins sulphited at pH 3, with 3% of sulphite and time of reation of 90 minutes. Sulphited tannins in pH equal to 2 had the worst results, therefore, adesives with pH of formulations lower than 3 should not be used. The best tannic adhesive was that produced with tannins hydrolised and sulphited to which were added 5% of extender and 5% of filler. Adhesives produced with sulphited tannins presented the worst results. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09-15 |
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/361 |
url |
https://cerne.ufla.br/site/index.php/CERNE/article/view/361 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/361/304 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2015 CERNE info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2015 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. 7 No. 1 (2001); 001-009 CERNE; v. 7 n. 1 (2001); 001-009 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_ |
1799874940064759808 |