This study investigates the impregnation factors affecting the treatment of wood with biomass-based phenol-formaldehyde (PF) resins, such as impregnation methods, resin properties, and setting parameters like time and pressure. The goal is to ensure effective resin penetration into the wood cell wall structure, thereby enhancing wood durability and mechanical properties. Previous literature has largely focused on resin treatment and testing of small-sized specimens. However, practical applications involving large-sized timber present more complex parameters. Applying the same impregnation conditions to large specimens may lead to unsatisfactory impregnation results. Therefore, this chapter aims to not only explore the influence of impregnation factors but also further evaluate the impregnation effectiveness on large-sized specimens, addressing the current research gap in this area. This study utilizes biomass-based PF resins synthesized according to Lin et al. (2025) to examine the differences between various resin types. Furthermore, it focuses on improving the curing process for large-sized specimens to prevent cracking caused by moisture gradients after resin treatment.

Download document (262 kb)
free for the members of IRG. Available if purchased.

Purchase this document