Sammanfattning

Scots pine sapwood blocks were acetylated by transesterification of vinyl acetate (VA) in various experimental conditions and compared with untreated blocks. Two solvents (dimethylformamide and N-methyl-pyrrolidone) and catalysts (K2CO3 and I2) were tested. The chemical modifications were investigated by infrared (FT-IR) spectroscopy and weight percentage gain calculations (WPG). The decay resistance imparted by the treatment was assessed by exposing the samples to the brown rot fungi Postia placenta, Coniophora puteana, Gloeophyllum trabeum and the white rot fungus Trametes versicolor, according to the European standard method EN 113. The ultimate compression and shear strength parallel to the grain and Brinell hardness were also evaluated. Results indicated that the treatment in NMP was very effective at protecting wood against the four basidomycete fungi investigated when the level of modification was sufficient. Lower WPG was achieved in the process without solvents but the durability was still satisfactory.

Publicerad i

Boktitel: The Sixth European Conference on Wood Modification PROCEEDINGS
ISBN: 978-961-6144-35-3
Utgivare: University of Ljubljana

Konferens

6th European Conference on Wood Modification (ECWM6)

SLU författare

• Terziev, Nasko

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Jebrane, Mohamed

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Chemical Process Engineering
Organic Chemistry
Materials Chemistry


Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/42988