关键词: 木材热处理, 加压蒸汽, 化学组分变化

Abstract:

Mongolian oak wood were thermally treated in atmospheric steam or 0.35 MPa pressurized steam. Chemical component changes of the treated samples were investigated by means of wet chemical analysis, elemental analysis and FTIR analysis. The results showed that, along with higher lignin and extractive contents, samples treated in pressurized steam exhibited lower holocellulose and moisture content compared with those treated in atmospheric steam. The analyses also suggested greater chemical structure changes in pressurized-steam-treated samples. Meanwhile, it could be determined that thermal degradation of both samples was modest at the treatment temperature of 185 ℃. These findings help explain the better dimensional stability and limited strength deterioration of wood treated in pressurized steam.

Key words: wood heat treatment, pressurized steam, chemical component