山苍子油对人工林北京杨的改性效果

Effect of Litsea cubeba oil on the modification of Beijing Poplar Plantation

为改善人工林杨木物理性能并提高其产品附加值,对山苍子油真空浸注人工林北京杨的改性效果进行了研究,测定改性前后的增重率、湿胀性、尺寸稳定性、材色变化、抗弯强度、抗弯弹性模量等物理性能,并利用SEM进行微观结构表征。结果表明,改性材边材增重率最高为138%,心材增重率最高为110.7%,湿胀率最低仅有2.6%,体积吸湿膨胀率最低仅为-0.11%,体积抗吸湿膨胀率最高达103.38%,抗弯弹性模量提高12.26%,颜色从白亮变为温暖柔和,接近马尾松木材的颜色值。SEM图像显示改性剂能通过导管及纹孔进入木材内部,均匀覆盖纹孔及导管壁并通过集聚和黏连形成聚合保护膜,填充导管、导管相互间纹孔和细胞腔,使改性材尺寸稳定性极大提高。

In order to improve the physical properties of poplar wood and increase the added value of the product,the modification effect of the lotus seed oil in the vacuum infusion plantation of Populus euphratica was studied.The weight gain rate,wet swellability and dimensional stability before and after the modification were determined.Physical properties such as properties,color change,flexural strength,and flexural modulus of elasticity were characterized by SEM microstructure.The results showed that the weight gain rate of modified material sapwood was up to 138%,the highest weight gain rate of heartwood was 110.7%,the lowest rate of wet swell was only 2.6%,the volumetric moisture absorption expansion rate is only-0.11%,the volume anti-hygroscopic expansion rate is up to 103.38%,the flexural modulus of elasticity is increased by 12.26%,and the color changes from white to warm and soft,close to the color value of the masson pine wood.The SEM image shows that the modifier can enter the interior of the wood through the conduit and the pores,evenly cover the pores and the wall of the conduit and form a polymeric protective film by agglomeration and adhesion,filling the pores and cell cavity between the conduit and the conduit,and modifying the material.The dimensional stability is greatly improved.