Fire-retardant properties of an intumescent fire retardant coating for wood using 4A zeolite
-
摘要: 以三聚氰胺改性脲醛树脂（MUF）为基料，添加聚磷酸铵（APP）和4A分子筛制备膨胀型木材阻燃涂料，利用锥形量热仪研究阻燃涂料涂饰杨木Populus spp.的燃烧性能。结果表明：①MUF中加入质量分数为50.00%的APP能延长杨木的点燃时间（TTI），降低杨木的热释放速率（HRR），总热释放速率（THR）和质量损失速率（MLR），提高杨木的火灾性能指数（FPI）（处理2为1.07），但会增大总发烟量（ISR）。②在阻燃涂料中加入少量的4A分子筛即可显著降低木材的热释放速率峰值（pk1-HRR，pk2-HRR），推迟峰值出现时间，降低木材有焰燃烧阶段的热释放速率和质量损失率，提高木材的火灾性能指数（处理3和4分别为1.26，1.38）。加入质量分数为1.00%的分子筛（处理3）可平衡由于50.00% APP存在增加的发烟量，加入质量分数为3.00%的分子筛（处理4）材料燃烧前400 s内基本无烟产生，总发烟量显著降低。图4表3参16Abstract: To evaluate the effect of ammonium polyphosphate （APP） and 4A zeolite on the fire-retardant properties of an intumescent fire retardant coating for wood, a coating was prepared with a mixture of synthesized melamine modified urea formaldehyde resin; APP, and 0, 1.00%, or 3.00% 4A zeolite. The coating was painted on fast-growing poplar wood, and then the fire retardant properties of the specimen were studied with a cone calorimeter. The 100 mm by 100 mm by 10 mm wood specimen were tested in a horizontal orientation. Flammability parameters, including ignition time, heat release rate （HRR）, total heat release （THR）, mass loss rate （MLR）, mass ratio, and total smoke release were recorded simultaneously. Results showed that for coated wood, APP decreased HRR, THR, and MLR but increased the total smoke release rate. With addition of 1.00% or 3.00% 4A zeolite, the first peak of HRR （pk1-HRR）, the second peak of HRR （pk2-HRR）, THR, and MLR of the coated wood decreased. The fire propagation index （FPI） of the coated wood increased to 1.26 for 1.00% and 1.38 for 3.00%. Also, with the addition of 3.00% 4A zeolite and before 400 s, the smoke release rate was almost zero. 4A zeolite can be used as a synergistic agent for intumescent fire retardant coating for wood. ［Ch, 4 fig. 3 tab. 16 ref.］
-
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.01.023
点击查看大图
计量
- 文章访问数: 2514
- HTML全文浏览量: 316
- PDF下载量: 643
- 被引次数: 0
下载:
