真空浸渍工艺对速生杨木改性材力学性能的影响  

Effect of Vacuum Impregnation on Mechanical Properties of Fast-growing Poplar

作　　者：王娱 王天龙[1] Wang Yu;Wang Tianlong(Beijing Forestry University,Beijing 100083,P.R.China)

机构地区：[1]北京林业大学

出　　处：《东北林业大学学报》2019年第6期53-56,共4页Journal of Northeast Forestry University

摘　　要：以速生杨木为试验材料,以不饱和聚酯树脂为改性剂,采用真空浸渍的方法处理速生杨木,探讨真空浸渍工艺对速生杨木力学性能的影响。浸渍处理工艺中真空度对改性后的速生杨木力学性能影响显著,真空度稳定时间、恢复常压时间及常压浸渍时间对改性速生杨木力学性能影响不显著。综合考虑,优化的工艺条件为真空度0.08MPa、真空度稳定时间15min、恢复常压时间140s、常压浸渍时间8min。经过改性处理后,处理材抗弯强度最大95.5MPa,增加81.66%;弹性模量最大8.13GPa,增加28.84%;顺纹抗压强度最大73.33MPa,增加34.28%;横纹径向全部抗压比例极限应力最大9.08MPa,增加52.09%;横纹弦向全部抗压比例极限应力最大6.04MPa,增加25.83%。With fast-growing poplar wood modified by vacuum impregnation process using unsaturated polyester resin as modifying agent,we studied the effect of vacuum impregnation process on the mechanical properties of poplar wood.The effect of vacuum degree on the mechanical properties of fast-growing poplar was significant,and the vacuum stabilization time,recovery time and atmospheric pressure were not significantly affected by the mechanical properties of poplar wood.The degree of vacuum in the vacuum impregnation progress had significant effect on the mechanical properties of the modified poplar wood,while factors of the vacuum settling time,restoring normal pressure time and atmospheric pressure impregnation time had not.The optimal process conditions were vacuum degree 0.08 MPa, vacuum settling time 15 min,restoring normal pressure time 140 s and atmospheric pressure impregnation time 8 min.Modulus of rupture,modulus of elasticity and compression strength superlatively increased by 81.66%,28.84% and 34.28%,respectively,and the horizontal local compressive proportional limit stress of radial direction and tangential direction were independently improved by 52.09% and 25.83% with modifying treatment.

关 键 词：速生杨木 不饱和树脂 真空浸渍 力学性能 

分 类 号：S781.29[农业科学—木材科学与技术] S784[农业科学—林学]