人工林速生杨木材水热压弯缺陷的微观构造研究

Microscopic Investigation of Defects in Hydrothermal and Compression Bending Artificially Prepared Poplar Wood

摘要: 通过水热和模压弯曲处理人工林速生杨，得到弯曲木。研究水热压弯对杨木微观构造的影响，以提高木材弯曲度，改善弯曲性能。用显微镜观察其微观构造发现，弯曲木存在较多的细观损伤，内外两侧的缺陷也有所不同且分布不均匀。结果表明：木材在水热模压弯曲条件下，早晚材、导管孔隙度、细胞壁厚度对木材弯曲都有较明显的影响，且最大缺陷在导木材管细胞壁上。

Abstract: A kind of bending poplar was fabricated by hydrothermal and compression bending artificially prepared poplar wood. The effects of hydrothermal and bending on microstructure of poplar wood were evaluated. Hydrothermal was applied on poplar wood to increase the crooked degree for improving its bending properties. Light-Microscopy was used for observation that the bent wood exhibited much meso-damage, with uneven distribution of the damage on both sides of the tension and compression. The results indicate that earlywood, latewood, vessel porosity, and cell wall thickness have a clear effect on poplar wood in hydrothermal and compression bending process conditions, and the largest damages occur in the cell wall.