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NMR-measurements for determination of local moisture content of coated wood
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
KTH Royal Institute of Technology.
2013 (English)In: JCT Research, ISSN 1547-0091, E-ISSN 2168-8028, Vol. 10, no 5, 601-607 p.Article in journal (Refereed) Published
Abstract [en]

Local increased moisture content (MC) in wood constructions may result in different kinds of mechanical and, especially, biological degrading problems. Therefore, it is of great importance to control the MC of the material. However, there is at present no appropriate method for determining local MC in wood without destroying the product itself. Nondestructive measurements of local MC in wood is significant for the possibility of, for instance, monitoring the in situ MC in wood constructions over time, and thereby predicting potential problems. The nuclear magnetic resonance (NMR) technique has been shown to be valuable for the measurement of MC in wood. In this study, the possibility of utilizing this technique for local MC measurement in wood has been tested on wood samples exposed to water absorption for 72 h. The samples came from three different wood species treated with paint systems available on the market. In the wood samples an artificial “crack” had been created in the paint to introduce an area where the water could easily gain access to the wood. The results show the possibility of using the NMR technique for local MC measurements in wood. The measurement area, however, must be related to the properties of the material. In the case of wood, the measurement spot must be related to the early/latewood proportions. Further, a calibration of the NMR measurement must be made in relation to the expected density variations of the material.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2013. Vol. 10, no 5, 601-607 p.
Keyword [en]
Wood coating, Nondestructive moisture measurements, Risk analysis, Nuclear magnetic resonance, Magnetic resonance imaging, MRI, Portable NMR
National Category
Materials Engineering
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-19526DOI: 10.1007/s11998-013-9484-4ISI: 000324136800002OAI: oai:DiVA.org:lnu-19526DiVA: diva2:531078
Available from: 2012-06-05 Created: 2012-06-05 Last updated: 2016-09-27Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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