Sammanfattning

Softwoods (SW, spruce and fir) and hardwoods (HW, ash and beech) were thermally modified by the thermo-vacuum (Termovuoto) process for 3-4 h in the temperature range 160-220 degrees C (TMW160-220 degrees C) and their fungal durability were examined in soil-block tests with two brown rot (BR, Postia placenta, Gloeophyllum trabeum) and two white rot (WR, Pycnoporus sanguineus, Phlebia radiata) fungi. SW-TMW160-220 degrees C were exposed to P. placenta and P. sanguineus and HW-TMW190-220 degrees C to all fungal species. Considerable improvement (durability class 1-3) in decay resistance was only achieved for SW-and HW-TMW 220 degrees C. Thermal modification (TM) below 200 degrees C influenced decay resistance negatively in case of some fungal species applied for both SW and HW. Judged by the durability class, decay resistance was higher in HW- than in SW-TMW at high TM temperature. Behavior of TM differed significantly between ash (ring-porous HW) and beech (diffuse-porous HW). A comparison between results of soil-and agar-block tests on Termovouoto wood demonstrated that the influence of testing method in terms of assignment to durability classes is not significant.

Nyckelord

brown rot; decay resistance; soil-block test; thermal modification (TM); thermo-vacuum (Termovuoto) process; white rot

Publicerad i

Holzforschung
2016, Volym: 70, nummer: 9, sidor: 877-884

SLU författare

• Gao, Jie

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Kim, Jongsik

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Terziev, Nasko

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

• Daniel, Geoffrey

  • Institutionen för skogens produkter, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Trävetenskap


Publikationens identifierare

DOI: https://doi.org/10.1515/hf-2015-0244

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/72728