Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood

Effects of impregnation with a silver nano-suspension, as well as of heat-treatment, on pull-off adhesion strengths of the coating system on three commercial solid wood species were studied. The wood species included beech, poplar, and fi r. The size range of silver nanoparticles was 30 – 80 nm. The...

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Autores principales:	Hamid Reza Taghiyari, Amir Samadarpour
Formato:	article
Lenguaje:	EN
Publicado:	University of Zagreb, Faculty of Forestry and Wood Technology 2016
Materias:	coating nanotechnology heat treatment permeability porous structure solid wood. solid wood Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/c956991201fc4556827044274091f5c0
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spelling	oai:doaj.org-article:c956991201fc4556827044274091f5c02021-12-02T03:06:17ZEffects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood10.5552/drind.2015.14190012-67721847-1153https://doaj.org/article/c956991201fc4556827044274091f5c02016-01-01T00:00:00Zhttp://hrcak.srce.hr/file/221891https://doaj.org/toc/0012-6772https://doaj.org/toc/1847-1153Effects of impregnation with a silver nano-suspension, as well as of heat-treatment, on pull-off adhesion strengths of the coating system on three commercial solid wood species were studied. The wood species included beech, poplar, and fi r. The size range of silver nanoparticles was 30 – 80 nm. The specimens were coated with an un-pigmented sealer and a clear fi nish on the basis of an organic solvent. The results showed that the highest and the lowest pull-off strengths were found in beech specimens heat-treated at 145 °C (5.7 MPa) and in nanosilver-impregnated poplar specimens heat-treated at 185 °C (2.5 MPa), respectively. Impregnation with nanosilver decreased pull-off strength in the case of all species as a result of formation of micro checks in the cell walls caused by the impregnation under high pressure in vessel. Heat-treatment at the temperature lower than 145 °C increased pull-off strength as to the irreversible hydrogen bonding in the course of water movements within the pore system of the cell walls, resulting in extra bonds among cell wall components and higher mechanical properties. However, heat treatment at the temperature higher than 185 °C significantly decreased the strength as the degradation of hemicellulose and cell wall wood components caused signifi cant decrease in mechanical strength and cell wall thinning. High thermal conductivity coefficient of silver intensified the impact of heat-treatment by rapid absorption of heat on the surface of the specimens.Hamid Reza TaghiyariAmir SamadarpourUniversity of Zagreb, Faculty of Forestry and Wood Technologyarticlecoatingnanotechnologyheat treatmentpermeabilityporous structuresolid wood.solid woodForestrySD1-669.5ENDrvna Industrija, Vol 66, Iss 4, Pp 312-327 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	coating nanotechnology heat treatment permeability porous structure solid wood. solid wood Forestry SD1-669.5
spellingShingle	coating nanotechnology heat treatment permeability porous structure solid wood. solid wood Forestry SD1-669.5 Hamid Reza Taghiyari Amir Samadarpour Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
description	Effects of impregnation with a silver nano-suspension, as well as of heat-treatment, on pull-off adhesion strengths of the coating system on three commercial solid wood species were studied. The wood species included beech, poplar, and fi r. The size range of silver nanoparticles was 30 – 80 nm. The specimens were coated with an un-pigmented sealer and a clear fi nish on the basis of an organic solvent. The results showed that the highest and the lowest pull-off strengths were found in beech specimens heat-treated at 145 °C (5.7 MPa) and in nanosilver-impregnated poplar specimens heat-treated at 185 °C (2.5 MPa), respectively. Impregnation with nanosilver decreased pull-off strength in the case of all species as a result of formation of micro checks in the cell walls caused by the impregnation under high pressure in vessel. Heat-treatment at the temperature lower than 145 °C increased pull-off strength as to the irreversible hydrogen bonding in the course of water movements within the pore system of the cell walls, resulting in extra bonds among cell wall components and higher mechanical properties. However, heat treatment at the temperature higher than 185 °C significantly decreased the strength as the degradation of hemicellulose and cell wall wood components caused signifi cant decrease in mechanical strength and cell wall thinning. High thermal conductivity coefficient of silver intensified the impact of heat-treatment by rapid absorption of heat on the surface of the specimens.
format	article
author	Hamid Reza Taghiyari Amir Samadarpour
author_facet	Hamid Reza Taghiyari Amir Samadarpour
author_sort	Hamid Reza Taghiyari
title	Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
title_short	Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
title_full	Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
title_fullStr	Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
title_full_unstemmed	Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood
title_sort	effects of nanosilver-impregnation and heat treatment on coating pulloff adhesion strength on solid wood
publisher	University of Zagreb, Faculty of Forestry and Wood Technology
publishDate	2016
url	https://doaj.org/article/c956991201fc4556827044274091f5c0
work_keys_str_mv	AT hamidrezataghiyari effectsofnanosilverimpregnationandheattreatmentoncoatingpulloffadhesionstrengthonsolidwood AT amirsamadarpour effectsofnanosilverimpregnationandheattreatmentoncoatingpulloffadhesionstrengthonsolidwood
_version_	1718401944942280704

Effects of Nanosilver-Impregnation and Heat Treatment on Coating Pulloff Adhesion Strength on Solid Wood

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