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In-situ penetration of ionic liquids during surface densification of Scots pine
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- Neyses, Benedikt, 1986- (author)
- Luleå tekniska universitet,Träteknik
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- Peeters, Kelly (author)
- InnoRenew CoE, Livade 6, SI-6310, Izola, Slovenia
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- Buck, Dietrich, 1990- (author)
- Luleå tekniska universitet,Träteknik
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- (creator_code:org_t)
- 2020-10-23
- 2021
- English.
- In: Holzforschung. - : Walter de Gruyter. - 0018-3830 .- 1437-434X. ; 75:6, s. 555-562
- Journal article (peer-reviewed)
Abstract
Subject headings
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- The moisture-induced recovery of compressed wood is one of the major problems of wood densification technology. Achieving a cost-efficient surface densification process without the need for additional resins to eliminate the set-recovery may lead to an increase in value of low-density wood species. A previous study has shown that a pre-treatment with ionic liquids (ILs) can nearly eliminate the set-recovery. It was however observed that during the pre-treatment process the IL did not penetrate sufficiently deep into the wood to explain the achieved reduction in set-recovery. Based on these findings, the hypothesis was posed that further penetration of the IL into the wood occurs during the densification stage as a consequence of the applied heat and pressure. Thermo-gravimetric analysis (TGA) and gas-chromatography mass-selective-detection (GC-MSD) showed that the depth of penetration of the IL was greater after the densification process than before. Digital image correlation (DIC) showed that in regions with a high IL concentration, there was almost no set-recovery, and it gradually increased with a decrease in the IL concentration, as observed with TGA and GC-MSD analysis.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
Keyword
- compressed wood
- digital image correlation
- set-recovery
- spectroscopy
- thermo-gravimetric analysis
- wood modification
- Träteknik
- Wood Science and Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Holzforschung
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- Luleå University of Technology
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