Measuring dimensional stability of thermally modified ayous and iroko wood: comparison of the three test methods

Basit Öğe Kaydı
dc.authorid0000-0001-6389-2649
dc.contributor.authorTomak, Eylem D.
dc.contributor.authorErmeydan, Mahmut A.
dc.date.accessioned2026-02-08T15:14:56Z
dc.date.available2026-02-08T15:14:56Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThe dimensional stability and moisture content of wood are important physical properties that influence the end-use of wood. These properties can be greatly improved by thermal modification of wood. In this study, three different test methods are studied on thermally modified iroko (Milicia excelsa) and ayous (Triplochiton scleroxylon) wood to compare the methods of measuring dimensional stability behavior. Test methods include (1) repeated water-soaking until saturation, (2) test cycles of water-soaking and drying, and (3) exposure to relative humidity cycles in the air. Test methods revealed enhanced dimensional stability in thermally modified wood samples relative to the unmodified samples. However, the relative dimensional stability behavior varied between the methods. Water-soaking until maximum swelling (Method-1) showed differences in the swelling rate for each wood material. Thermally modified ayous wood swelled more slowly (similar to 44%) than thermally modified iroko wood. Interestingly, subsequent test methods (Methods 2 and 3) showed decreasing dimensional stability especially for modified iroko wood as the wetting-drying cycles increased and iroko wood was kept in high relative humidity such as 85%. The cracks in the cross-section were more in modified iroko samples than in the controls, whilst modified ayous wood had no visible cracks in the cycles of wetting and drying in Method-2. The anti-swelling efficiency of thermally modified ayous wood was found as similar to 45%, 30%, and 40-60% in Method 1, 2 and 3, respectively. The results of the three different methods clearly showed that thermal modification ensured good dimensional stability for ayous wood, whereas in iroko wood insufficient dimensional stability was obtained, especially in Methods 2 and 3. Thermal modification may not be a good option to ensure dimensional stability for iroko wood. For a complete understanding of dimensional stability in wood modification studies, long-term wetting and drying cycles and/or air humidity cycles are recommended especially for extractive-rich wood species.
dc.description.sponsorshipScientific and Technological Research Council of Turkiye (TUBITAK)
dc.description.sponsorshipOpen access funding provided by the Scientific and Technological Research Council of Turkiye (TUBITAK). There is no funding for this study.
dc.identifier.doi10.1007/s10570-025-06404-2
dc.identifier.endpage2597
dc.identifier.issn0969-0239
dc.identifier.issn1572-882X
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85217389261
dc.identifier.scopusqualityQ1
dc.identifier.startpage2581
dc.identifier.urihttps://doi.org/10.1007/s10570-025-06404-2
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5514
dc.identifier.volume32
dc.identifier.wosWOS:001412163800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofCellulose
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzWOS_KA_20260207
dc.subjectThermal modification
dc.subjectDimensional stability
dc.subjectAir humidity
dc.subjectWater absorption
dc.subjectWood
dc.subjectSwelling
dc.titleMeasuring dimensional stability of thermally modified ayous and iroko wood: comparison of the three test methods
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu