Varnish Adhesion Performance of Densified and Thermally Post-treated Beech and Pine Wood
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
North Carolina State Univ Dept Wood & Paper Sci
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The adhesion strength was studied for water-based nano-varnishes and pine (Pinus sylvestris L.) woods. Specimens were thermomechanically densified at different compression ratios (20% and 40%) and temperatures (110 degrees C and 150 degrees C), and subsequently thermally treated at 190, 200, and 210 degrees C. One-component (OWB) and two-component (TWB) nano-varnishes were applied, and adhesion strength was evaluated using the pull-off test. Results revealed that the modification processes greatly influenced adhesion, with distinct effects depending on wood species. For untreated beech, densification improved adhesion strength, whereas for pine, it either reduced or did not cause a pronounced change. A primary finding was that thermal treatment decreased adhesion strength for all specimens in a temperature-dependent manner; higher temperatures led to progressively lower adhesion. This decline was more pronounced in densified specimens (especially beech wood). The reason was attributed to the cohesive failure within the weakened wood substrate rather than adhesive failure at the varnish-wood interface. Across all treatment conditions, TWB varnish exhibited superior adhesion compared to OWB. The study concluded that densification may have a species-specific effect, while thermal treatment fundamentally reduces wood surface strength and, consequently, varnish adhesion.
Açıklama
Anahtar Kelimeler
Adhesion Strength, Beech Wood, Densification, Pine Wood, Thermal Freatment, Varnish
Kaynak
Bioresources
WoS Q Değeri
Q2
Scopus Q Değeri
N/A
Cilt
20
Sayı
4
