Sorption-related characteristics of surface charred spruce wood

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Kymäläinen, Maija Turunen, Hannu Čermák, Petr Hautamäki, Saara Rautkari, Lauri 2018-12-10T10:23:40Z 2018-12-10T10:23:40Z 2018-10-24
dc.identifier.citation Kymäläinen , M , Turunen , H , Čermák , P , Hautamäki , S & Rautkari , L 2018 , ' Sorption-related characteristics of surface charred spruce wood ' Materials , vol. 11 , no. 11 , 2083 . DOI: 10.3390/ma11112083 en
dc.identifier.issn 1996-1944
dc.identifier.other PURE UUID: 8ea26737-17ac-409f-ad33-544bec29153d
dc.identifier.other PURE ITEMURL:
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dc.description.abstract Surface charring of wood is a one-sided thermal modification process that can be used to create a hydrophobic, durable surface to exterior claddings. Spruce (Picea abies L.) wood samples were charred with a hot plate and several time-temperature combinations while using simultaneous surface compression. Temperature profile, water sorption, cupping after water exposure and density profile were measured. Furthermore, changes in the microstructure and surface functional groups were investigated by scanning electron microscopy and photoacoustic FT-IR spectroscopy. Results show that surface charring notably improves the hydrophobicity measured by contact angle, water floating and dynamic vapour sorption. Increased holding time during charring reduced the sorption but at the same time increased the dimensional instability measured by cupping. The density profile showed a shifting density peak with more severe modification regimes, indicating a more porous surface. The PAS-FTIR showed increased aromaticity of the surface that was also present in the pyrolysis zone beneath the surface in samples modified with longer holding time. Higher modification temperature affected the sorption as well as cupping positively but it is possible similar results can be obtained with lower temperature and longer holding time. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Materials en
dc.relation.ispartofseries Volume 11, issue 11 en
dc.rights openAccess en
dc.subject.other Materials Science(all) en
dc.subject.other 216 Materials engineering en
dc.title Sorption-related characteristics of surface charred spruce wood en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Bioproducts and Biosystems
dc.contributor.department Mikkeli University of Applied Sciences
dc.contributor.department Mendel University in Brno
dc.subject.keyword Char
dc.subject.keyword Surface modification
dc.subject.keyword Thermal modification
dc.subject.keyword Wood
dc.subject.keyword Wood char
dc.subject.keyword Materials Science(all)
dc.subject.keyword 216 Materials engineering
dc.identifier.urn URN:NBN:fi:aalto-201812106169
dc.identifier.doi 10.3390/ma11112083
dc.type.version publishedVersion

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