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采用氨溶季胺铜(ACQ-D)与低分子酚醛树脂预聚液(PF),对江苏淮阴地区速生杨木进行浸渍防腐与增强改性处理,测试并分析材料改性前后基本力学性能变化情况。检测结果表明,以日本JAS集成材结构用材标准衡量,速生杨木木材由于力学性能较低不能用作建筑结构用材;试验范围内满细胞法浸渍ACQ-D防腐改性处理,不显著改变速生杨木的力学性能;采用不同浓度低分子酚醛树脂预聚液浸渍改性处理,材料力学性能改善幅度较大:质量分数分别为10%、20%、30%和40%的PF杨木改性材,与未处理材相比,抗弯弹性模量提高了29.211%、42.851%、63.004%和87.742%,抗弯强度提高了56.284%、68.306%、74.426%和89.836%,顺纹压缩强度提高了44.563%、58.907%、72.398%和98.372%,可满足不同级别结构用材要求,质量分数为40%的PF改性处理,材料可达到JAS标准中A组一级结构用材要求。
Ammonia-soluble quaternary ammonium copper (ACQ-D) and low molecular weight phenolic resin prepolymer (PF) were used to impregnate and improve the modified poplar in Huaiyin area of Jiangsu Province. The changes of basic mechanical properties before and after modification were tested and analyzed. Happening. The test results showed that the fast-growing poplar wood could not be used as building material due to its low mechanical properties due to the standard of Japanese JAS timber structural materials. In the test area, ACQ-D was impregnated with full-cell method for preservative modification, The mechanics properties of wood were improved by different concentrations of low molecular phenolic resin pre-polymerization solution impregnation, the mechanical properties of the material improved greatly: PF wood modified materials with mass fractions of 10%, 20%, 30% and 40% , Flexural modulus increased by 29.211%, 42.851%, 63.004% and 87.742%, flexural strength increased by 56.284%, 68.306%, 74.426% and 89.836% compared with untreated material, 44.563%, 58.907%, 72.398% and 98.372%. It can meet the requirements of structural materials with different grades and mass fraction of 40%. The material can meet the requirements of Grade A structural materials in JAS standard.