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Wood modification with lignin cleavage products-phenol-formaldehyde impregnation resin: resistance to soft-rot decay in soil contact
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DOI：10.1515/hf-2025-0148.png)
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Abstract
En 中文
The substitution of phenol in phenol-formaldehyde (PF) resins used for wood modification with renewable lignin cleavage products (LCP) can reduce non-renewable resource consumption. Previous studies indicate that replacing 30-40 % of the phenol in PF resins yields high performance wood products, but the effect on soft-rot resistance has not yet been studied. In this study, 30 % of phenol in a PF resin was substituted by softwood kraft LCP from pyrolysis. Scots pine sapwood (Pinus sylvestris) and European beech wood (Fagus sylvatica) were modified with the resin by impregnation and curing. Resistance to soft-rot was determined according to CEN/TS 15083-2 (2005) in laboratory-based terrestrial microcosm tests. The resin-treated wood specimens showed oven-dry mass loss below 0.5 %, indicating a high durability (durability class 1), with no significant difference between PF and LCP-PF resins. The results indicate that a high-performance wood modification is possible, while reducing the use of non-renewable phenol.
Keywords:
decay
durability
renewable chemicals
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