糠醇和玻璃纤维处理对木材弯曲蠕变的影响

Effect of Furfurylation and Glass Fiber Treatment on Bending Creep of Wood

摘要:

分别用质量分数为30%的糠醇溶液浸渍意杨（P）和在P表面粘贴玻璃纤维布来获得糠醇改性意杨（FP）及玻璃纤维增强意杨（GFRP），并对GFRP、FP和P的弯曲蠕变性能进行测试分析.结果表明：在加载应力水平分别为各自静曲强度35%的条件下，GFRP和FP的普通蠕变最大挠度相比于P分别降低了21.97%和36.93%，机械吸附蠕变最大挠度分别降低了75.56%和81.49%；在加载应力水平均为P静曲强度35%的条件下，GFRP和FP的普通蠕变最大挠度相比于P分别降低了66.25%和38.00%，机械吸附蠕变最大挠度分别降低了85.22%和7888%.糠醇改性和玻璃纤维增强处理均不能改变P的普通蠕变特性，但能有效降低其普通蠕变挠度.GFRP和FP丧失了P原有的机械吸附蠕变特性而仅表现出普通蠕变特性，有效增强了P的抗机械吸附蠕变能力.

Abstract:

The creep properties of populus(P), furfurylation populus(FP) were impregnated with 30% furfurylation solution and glass fiber reinforced populus(GFRP) which was bonded with glass fiber cloth on surface were tested and analyzed. The results show that when the loading level is 35% of the static bending failure strength of each material, compared with the maximum normal creep deflection of P, that of GFRP and FP is reduced by 21.97% and 36.93% respectively and the maximum mechanical sorptive creep deflection is reduced by 75.56% and 81.49% respectively. When the loading level was 35% of the static bending failure strength of P, compared with the maximum normal creep deflection of P, that of GFRP and FP is reduced by 66.25% and 38.00% respectively and the maximum mechanical sorptive creep deflection is reduced by 8522% and 78.88% respectively. It is found that neither GFRP nor FP treatment changes the normal creep characteristics of P, but it can effectively reduce the normal creep deflection of P. GFRP and FP treatment make the mechanical sorptive creep properties of P lost and only shows normal creep characteristics, it effectively enhances the resistance of P to mechanical sorptive creep.