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利用低分子酚醛树脂(PF)、脲醛树脂预聚液(UF)和氨溶季胺铜防腐液对速生杨木木材进行化学浸渍改性,对处理前后试件的力学性能和防腐性能进行了测试与评价。试验结果表明:在试验范围内,氨溶季胺铜浸渍防腐改性处理对材料力学性能影响不大;PF浸渍改性材的抗弯弹性模量、抗弯强度、顺纹抗压强度和顺纹抗拉强度分别提高了97.1、83.4、125.5和37.0%;UF浸渍改性材对应力学性能指标分别提高了49.4、10.7、42.0和17.8%;试验所用速生杨木木材耐腐性能较差,属于II级,经过PF、UF和氨溶季胺铜防腐液浸渍改性,材料耐腐级别达到了强耐腐级,其中PF浸渍改性处理效果最好,处理材质量损失率从素材的18.7%降低到了2.9%,有效地提高了材料的防腐性能。从综合效果来看,低分子酚醛树脂预聚液浸渍改性处理是提高和改善速生杨木木材的力学性能和防腐性能的有效措施。
The quick-curing poplar wood was modified by chemical impregnation with low molecular weight phenolic resin (PF), urea-formaldehyde resin prepolymer (UF) and ammonia-soluble quaternary ammonium copper. The mechanical properties and corrosion resistance of the treated wood before and after treatment were tested And evaluation. The experimental results show that: within the experimental range, ammonia-soluble quaternary ammonium copper impregnation corrosion modification of the mechanical properties of the material has little effect; PF impregnated modified material flexural modulus, flexural strength, compressive strength along the grain and grain along Tensile strength increased by 97.1,83.4,125.5 and 37.0%; UF impregnated modified material corresponding mechanical properties were increased by 49.4,10.7,42.0 and 17.8%; test fast-growing poplar wood corrosion resistance is poor, belonging to II Grade, after PF, UF and ammoniacal quaternary ammonium copper anticorrosive liquid immersion modification, material corrosion resistance reached a level of strong decay resistance, of which PF impregnation modification effect is best, the quality of the material loss rate decreased from 18.7% To 2.9%, effectively improve the corrosion resistance of the material. From the comprehensive effect point of view, low molecular weight phenolic resin prepolymer impregnation modification is to improve and improve the mechanical properties of poplar wood and anti-corrosion performance of the effective measures.