EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/14588 |
Resumo: | http://dx.doi.org/10.5902/1980509814588This work aimed to evaluate the methods for extraction of tannin from the bark of Pinus caribaea var. bahamensis, as well as to evaluate the technical feasibility of using tannins from the barks of Pinus caribaea var. bahamensis, of Acacia mearnsii, the mixtures of black wattle and pine tannins and the mixture of adhesive urea formaldehyde (UF) with black wattle and pine tannins in the production of adhesives for particleboard. The barks of Pinus caribaea var. bahamensis were fragmented in hammer mill, sieved and extracted under reflux for 2 hours, using a bark: liquor relation of 1:15, in nine treatments. The best extraction was used to obtain large quantities of extracts, which were used in the manufacture of adhesives and mixtures with UF adhesive and tannins of black wattle and the manufacture of particleboard. The addition of sodium sulfite gave higher extraction of tannin, which was extracted with the addition of 5% sodium sulfite. The results showed that both the black wattle tannin, as the bark of Pinus caribaea var. bahamensis have good bonding properties. It is possible to add pine tannin solution to the solution of black wattle and to replace part of the UF adhesive for the wattle tannins up to 25%, without compromising the glue quality. Replacing 10% of UF for tannic extract, both pine and black wattle, did not alter the values of thickness swelling (TS) of the panels. It is possible to obtain good mechanical properties with UF adhesives modified with tannic extracts at a ratio of 10%. The high values found for the internal bond (IB) panels containing tannin extracts showed the potential of these tannic extracts for bonding wood materials. |
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EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARDAvaliação de adesivos à base de taninos de Pinus caribaea var. bahamensis e de Acacia mearnsii na fabricação de painéis aglomeradospolyphenolsextractivesgluingmedium density particleboardspolifenóisextrativoscolagempainéis de partículas de média densidade.http://dx.doi.org/10.5902/1980509814588This work aimed to evaluate the methods for extraction of tannin from the bark of Pinus caribaea var. bahamensis, as well as to evaluate the technical feasibility of using tannins from the barks of Pinus caribaea var. bahamensis, of Acacia mearnsii, the mixtures of black wattle and pine tannins and the mixture of adhesive urea formaldehyde (UF) with black wattle and pine tannins in the production of adhesives for particleboard. The barks of Pinus caribaea var. bahamensis were fragmented in hammer mill, sieved and extracted under reflux for 2 hours, using a bark: liquor relation of 1:15, in nine treatments. The best extraction was used to obtain large quantities of extracts, which were used in the manufacture of adhesives and mixtures with UF adhesive and tannins of black wattle and the manufacture of particleboard. The addition of sodium sulfite gave higher extraction of tannin, which was extracted with the addition of 5% sodium sulfite. The results showed that both the black wattle tannin, as the bark of Pinus caribaea var. bahamensis have good bonding properties. It is possible to add pine tannin solution to the solution of black wattle and to replace part of the UF adhesive for the wattle tannins up to 25%, without compromising the glue quality. Replacing 10% of UF for tannic extract, both pine and black wattle, did not alter the values of thickness swelling (TS) of the panels. It is possible to obtain good mechanical properties with UF adhesives modified with tannic extracts at a ratio of 10%. The high values found for the internal bond (IB) panels containing tannin extracts showed the potential of these tannic extracts for bonding wood materials. http://dx.doi.org/10.5902/1980509814588Este trabalho teve por objetivo avaliar os métodos para a extração dos taninos da casca do Pinus caribaea var. bahamensis, assim como verificar a viabilidade técnica de utilização dos taninos da casca de Pinus caribaea var. bahamensis, de Acacia mearnsii, de misturas de taninos de acácia negra e pinus e de misturas do adesivo ureia-formaldeído (UF) com taninos de acácia e pinus na produção de adesivos para aglomerados. As cascas de Pinus caribaea var. bahamensis foram fragmentadas em moinho de martelo, peneiradas, extraídas sob refluxo, por 2 horas, utilizada uma relação casca:licor de 1:15 p:v, em nove tratamentos. A melhor forma de extração foi utilizada para obtenção de grandes quantidades de extratos, que foram utilizados na confecção de adesivos tânicos e nas misturas com adesivo UF e com taninos comerciais de acácia negra na fabricação de painéis aglomerados. A adição de sulfito de sódio proporcionou maior extração de taninos, sendo recomendável a extração com adição de 5% de sulfito de sódio. Os resultados mostraram que tanto os taninos de acácia, quanto os de Pinus caribaea var. bahamensis, apresentam boas propriedades de colagem. É possível a adição de solução tânica de pinus à solução tânica de acácia e também substituir parte do adesivo UF pelos taninos de acácia em até 25% sem comprometer a qualidade da colagem. A substituição de 10% de UF por extrato tânico, tanto de pinus quanto de acácia, não alterou os valores de inchamento em espessura (IE) dos painéis. É possível obter boas propriedades mecânicas com adesivos UF modificados com extratos tânicos na proporção de 10%. Os altos valores encontrados para ligação interna (LI) dos painéis fabricados com extratos tânicos evidenciaram o potencial desses taninos para colagem de painéis de madeira. Universidade Federal de Santa Maria2014-06-27info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/1458810.5902/1980509814588Ciência Florestal; Vol. 24 No. 2 (2014); 479-489Ciência Florestal; v. 24 n. 2 (2014); 479-4891980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/14588/9078Carvalho, Amélia GuimarãesLelis, Roberto Carlos CostaNascimento, Alexandre Miguel doinfo:eu-repo/semantics/openAccess2017-04-13T14:07:37Zoai:ojs.pkp.sfu.ca:article/14588Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-04-13T14:07:37Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD Avaliação de adesivos à base de taninos de Pinus caribaea var. bahamensis e de Acacia mearnsii na fabricação de painéis aglomerados |
title |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
spellingShingle |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD Carvalho, Amélia Guimarães polyphenols extractives gluing medium density particleboards polifenóis extrativos colagem painéis de partículas de média densidade. |
title_short |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
title_full |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
title_fullStr |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
title_full_unstemmed |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
title_sort |
EVALUATION OF ADHESIVES BASED ON TANNINS FROM Pinus caribaea var. bahamensis AND Acacia mearnsii IN THE MANUFACTURE OF PARTICLEBOARD |
author |
Carvalho, Amélia Guimarães |
author_facet |
Carvalho, Amélia Guimarães Lelis, Roberto Carlos Costa Nascimento, Alexandre Miguel do |
author_role |
author |
author2 |
Lelis, Roberto Carlos Costa Nascimento, Alexandre Miguel do |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Carvalho, Amélia Guimarães Lelis, Roberto Carlos Costa Nascimento, Alexandre Miguel do |
dc.subject.por.fl_str_mv |
polyphenols extractives gluing medium density particleboards polifenóis extrativos colagem painéis de partículas de média densidade. |
topic |
polyphenols extractives gluing medium density particleboards polifenóis extrativos colagem painéis de partículas de média densidade. |
description |
http://dx.doi.org/10.5902/1980509814588This work aimed to evaluate the methods for extraction of tannin from the bark of Pinus caribaea var. bahamensis, as well as to evaluate the technical feasibility of using tannins from the barks of Pinus caribaea var. bahamensis, of Acacia mearnsii, the mixtures of black wattle and pine tannins and the mixture of adhesive urea formaldehyde (UF) with black wattle and pine tannins in the production of adhesives for particleboard. The barks of Pinus caribaea var. bahamensis were fragmented in hammer mill, sieved and extracted under reflux for 2 hours, using a bark: liquor relation of 1:15, in nine treatments. The best extraction was used to obtain large quantities of extracts, which were used in the manufacture of adhesives and mixtures with UF adhesive and tannins of black wattle and the manufacture of particleboard. The addition of sodium sulfite gave higher extraction of tannin, which was extracted with the addition of 5% sodium sulfite. The results showed that both the black wattle tannin, as the bark of Pinus caribaea var. bahamensis have good bonding properties. It is possible to add pine tannin solution to the solution of black wattle and to replace part of the UF adhesive for the wattle tannins up to 25%, without compromising the glue quality. Replacing 10% of UF for tannic extract, both pine and black wattle, did not alter the values of thickness swelling (TS) of the panels. It is possible to obtain good mechanical properties with UF adhesives modified with tannic extracts at a ratio of 10%. The high values found for the internal bond (IB) panels containing tannin extracts showed the potential of these tannic extracts for bonding wood materials. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-06-27 |
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://periodicos.ufsm.br/cienciaflorestal/article/view/14588 10.5902/1980509814588 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/14588 |
identifier_str_mv |
10.5902/1980509814588 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/14588/9078 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 24 No. 2 (2014); 479-489 Ciência Florestal; v. 24 n. 2 (2014); 479-489 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944129274183680 |