A range of studies has shown that Royal treated wood can provide excellent protection against weathering and decay fungi. This treatment combines the protective properties of a wood protection agent and the hydrophobic properties of a subsequent oil treatment in a wood product.
Copper-based wood preservatives, which are tradidionally used in CIP, are very effective but their long-term future use is questionable because of environmental issues, especially the toxicity against marine organisms. There is a need for new eco-friendly wood preservative systems for a use in CIP.
The substitutes for copper used in this study are natural polymers and organic biocides. The aim of this research is to describe the fixation and antifungal effectiveness of the following compounds: CX-8, Chitosan, Scanimp, Tannin, fire protection agent.
The scots pine sapwood samples (50x25x15mm) were impregnated and oil treated. The treated products were analysed for their preservative-and oil-retention. Preservative fixation time influence on oil treatment was tested. The treated samples were leached according to EN84. Water samples were analyzed for the amount of active ingredient. After leaching the samples were exposed to fungal attack by Coniophora puteana and Trametes versicolor according to EN113. Treated samples without oil showed less performance against fungi, especially tannin and chitosan.
Keywords: copper, chitosan, tannin, scots pine sapwood, leaching, EN113
Authors
Liibert L.
Department of Polymer Materials, Tallinn University of Technology, Tallinn, Estonia
Treu A.
Norwegian Forest and Landscape Institute, Section Wood technology, Ås, Norway
Meier P.
Department of Polymer Materials, Tallinn University of Technology, Tallinn, Estonia
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