学术论文

      改性处理对杨木力学和燃烧性能的影响

      Effect of Modification on Mechanical Property and Fire-Retardant Behavior of Fast-Growing Poplar Wood

      摘要:
      采用硼酸复配酚醛树脂(简称BPF)对速生杨木进行改性,研究了改性处理对杨木力学和燃烧性能的影响,并与杉木和花旗松进行了对比.结果表明,杨木未达到规范中最低一级的强度等级,20%,BPF 改性材强度等级达到TB11级,30%,BPF 和40%,BPF改性材达到TB13级;20%,BPF、30%,BPF和40%,BPF改性后,试件氧指数分别提高97.37%,、113.68%,和128.42%,;与花旗松和杉木相比,杨木热释放速率、总热释放量和 CO2生成速率更高,BPF改性处理能有效地降低杨木可燃性,延长杨木的点燃时间,且改性程度越高,阻燃效果越好,其中40%,BPF 改性后,试件总热释放量峰值降低31.22%,,比花旗松高14.33%,;总热释放量与花旗松持平,CO2生成速率峰值降低30.57%,,比花旗松高6.01%,,残重率提高64.83%,,燃烧性能已达到常规建筑用材的水平.
      Abstract:
      Fast-growing poplar wood was modified with boric acid phenol formaldehyde resin (BPF) at different con-centrations. In comparison with structural Douglas fir and Chinese fir, the effect of modification on the mechanical and burning behavior of poplar wood was studied. The results show that the strength level of poplar wood cannot meet the demand of related standards. The modified poplar wood with 20% BPF reaches TB11, and both 30% and 40% BPF-poplar wood reaches TB13. The oxygen indexes of 20%, 30% and 40% BPF-poplar wood increase by 97.37%, 113.68% and 128.42%, respectively. Poplar wood shows higher heat release rate (HRR), total heat release (THR) and production rate of CO2 (PR-CO2) than both Douglas fir and Chinese fir. The BPF modification can effectively reduce the combustibility and delay the ignition time of poplar wood, and that higher BPF concentration has a better fire-retardant behavior. The HRR peak value of 40% BPF-poplar wood is reduced by 31.22%, which is 14.33% higher than that of Douglas fir .The THR value of 40% BPF-poplar wood is similar to that of Douglas fir. The PR-CO2 peak value of 40% BPF-poplar wood is reduced by 30.57%, which is 6.01% higher than that of Douglas fir. The residual weight of 40% BPF-poplar wood is increased by 64.83%. Its burning behavior reaches and even is higher than the level of conventional building structural wood materials.
      作者: 岳孔 [1] 程秀才 [2] 王磊磊 [1] 陆伟东 [1] 万里 [1] 刘伟庆 [1] 贾翀 [3]
      Author: Yue Kong [1] Cheng Xiucai [2] Wang Leilei [1] Lu Weidong [1] Wan Li [1] Liu Weiqing [1] Jia Chong [3]
      作者单位: 南京工业大学土木工程学院,南京,211800 南京市产品质量监督检验院,南京,210091 南京林业大学材料科学与工程学院,南京,210037
      刊 名: 燃烧科学与技术 ISTICEIPKU
      年,卷(期): 2016, 22(5)
      分类号: S782.39
      机标分类号: S78 TS6
      在线出版日期: 2016年11月21日
      基金项目: 国家林业公益性行业专项基金资助项目(201304504);国家自然科学基金资助项目(51208251);江苏省高校自然科学研究资助项目(14KJB 220001);江苏省质量技术监督局科技基金资助项目