Activation of timber surfaces by flame and corona treatments to improve adhesion

Detalhes bibliográficos
Autor(a) principal: Custódio, J.
Data de Publicação: 2009
Outros Autores: Broughton, J., Cruz, H., Winfield, P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://repositorio.lnec.pt:8080/jspui/handle/123456789/16957
Resumo: Long-term durability of a structural adhesive joint is an important requirement, because it has to be able to support the required design loads, under service conditions, for the planed lifetime of the structure. One way of improving bond durability is through the use of surface treatments prior to bonding, which will activate the adherends' surface, making it more receptive to the adhesive. In this study, the effects of two surface pre-treatments (corona discharge and flame ionization) on three timbers (maritime pine, iroko, and European oak) were evaluated quantitatively through contact angle measurements. These measurements allowed the determination of the changes in the timber surface thermodynamic characteristics, thus indicating which pre-treatment performed better. The results showed that both techniques increased each timber's surface free energy, which could translate into a durability enhancement of bonded joints. Overall, the corona-discharge treatment looks more promising, since this treatment leads to a bigger increase in the timber's surface energy, especially in its polar component, whilst also tended to be less species specific, less susceptible to variation, and the treatment effects lasted longer for this type of treatment.
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spelling Activation of timber surfaces by flame and corona treatments to improve adhesionLong-term durability of a structural adhesive joint is an important requirement, because it has to be able to support the required design loads, under service conditions, for the planed lifetime of the structure. One way of improving bond durability is through the use of surface treatments prior to bonding, which will activate the adherends' surface, making it more receptive to the adhesive. In this study, the effects of two surface pre-treatments (corona discharge and flame ionization) on three timbers (maritime pine, iroko, and European oak) were evaluated quantitatively through contact angle measurements. These measurements allowed the determination of the changes in the timber surface thermodynamic characteristics, thus indicating which pre-treatment performed better. The results showed that both techniques increased each timber's surface free energy, which could translate into a durability enhancement of bonded joints. Overall, the corona-discharge treatment looks more promising, since this treatment leads to a bigger increase in the timber's surface energy, especially in its polar component, whilst also tended to be less species specific, less susceptible to variation, and the treatment effects lasted longer for this type of treatment.International Journal of Adhesion and Adhesives2009-10-13T16:04:27Z2010-04-26T16:34:29Z2014-10-20T15:58:18Z2017-04-12T15:02:25Z2009-01-01T00:00:00Z2009info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/16957eng0143-7496Custódio, J.Broughton, J.Cruz, H.Winfield, P.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-13T03:02:34Zoai:localhost:123456789/16957Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:38:36.680504Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Activation of timber surfaces by flame and corona treatments to improve adhesion
title Activation of timber surfaces by flame and corona treatments to improve adhesion
spellingShingle Activation of timber surfaces by flame and corona treatments to improve adhesion
Custódio, J.
title_short Activation of timber surfaces by flame and corona treatments to improve adhesion
title_full Activation of timber surfaces by flame and corona treatments to improve adhesion
title_fullStr Activation of timber surfaces by flame and corona treatments to improve adhesion
title_full_unstemmed Activation of timber surfaces by flame and corona treatments to improve adhesion
title_sort Activation of timber surfaces by flame and corona treatments to improve adhesion
author Custódio, J.
author_facet Custódio, J.
Broughton, J.
Cruz, H.
Winfield, P.
author_role author
author2 Broughton, J.
Cruz, H.
Winfield, P.
author2_role author
author
author
dc.contributor.author.fl_str_mv Custódio, J.
Broughton, J.
Cruz, H.
Winfield, P.
description Long-term durability of a structural adhesive joint is an important requirement, because it has to be able to support the required design loads, under service conditions, for the planed lifetime of the structure. One way of improving bond durability is through the use of surface treatments prior to bonding, which will activate the adherends' surface, making it more receptive to the adhesive. In this study, the effects of two surface pre-treatments (corona discharge and flame ionization) on three timbers (maritime pine, iroko, and European oak) were evaluated quantitatively through contact angle measurements. These measurements allowed the determination of the changes in the timber surface thermodynamic characteristics, thus indicating which pre-treatment performed better. The results showed that both techniques increased each timber's surface free energy, which could translate into a durability enhancement of bonded joints. Overall, the corona-discharge treatment looks more promising, since this treatment leads to a bigger increase in the timber's surface energy, especially in its polar component, whilst also tended to be less species specific, less susceptible to variation, and the treatment effects lasted longer for this type of treatment.
publishDate 2009
dc.date.none.fl_str_mv 2009-10-13T16:04:27Z
2009-01-01T00:00:00Z
2009
2010-04-26T16:34:29Z
2014-10-20T15:58:18Z
2017-04-12T15:02:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.publisher.none.fl_str_mv International Journal of Adhesion and Adhesives
publisher.none.fl_str_mv International Journal of Adhesion and Adhesives
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