In-situ penetration of ionic liquids during surface densification of Scots pine

Abstract: 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.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: In-situ penetration of ionic liquids during surface densification of Scots pine ; volume:75 ; number:6 ; year:2021 ; pages:555-562 ; extent:08 ; Holzforschung ; 75, Heft 6 (2021), 555-562 (gesamt 08)

Contributors, Places and Time

• Creator: Neyses, Benedikt ; Peeters, Kelly ; Buck, Dietrich ; Rautkari, Lauri ; Sandberg, Dick

Further information

• DOI: 10.1515/hf-2020-0146
• URN: urn:nbn:de:101:1-2501161608557.934679890153
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:33 AM CEST