重组竹阻燃处理工艺

Fire retardant treatment process of bamboo scrimber

为研制阻燃性能优异的重组竹,采用常压浸渍法对竹束进行阻燃处理,研究阻燃处理工艺对竹束载药率和重组竹物理力学性能的影响。结果表明:竹束载药率随着浸渍处理时间的延长和阻燃剂的质量分数的增大而增大;阻燃重组竹的含水率和24 h吸水厚度膨胀率大于未阻燃重组竹,且随着浸渍处理时间的延长和阻燃剂质量分数的增大而增大;阻燃重组竹的内结合强度和静曲强度低于未阻燃重组竹,且随着浸渍处理时间的延长和阻燃剂质量分数的增大逐渐降低。综合评判,竹束浸渍处理的较佳时间为120 min,阻燃剂的质量分数不宜大于30%。

In recent years, the bamboo scrimber has been widely used in construction and decoration. Since bambooscrimber is a combustible material, the fire risk also increases with the increase of its usage. It is therefore necessary todevelop the fire-retarding bamboo scrimber. In order to develop the bamboo scrimber with excellent fire-resistant proper-ties, the fire-retarding bamboo scrimber was manufactured by atmospheric impregnation method. The results showed thatthe retention of bamboo bundles increased with the increase of impregnation time and mass fraction of fire retardant. A-mong them, the effect of mass fraction of fire retardant was more significant. When the mass fraction of fire retardant wasmore than 30%, it would be separated from the surface of the bamboo bundles and not conducive to the production of thefire-retarding bamboo scrimber. The moisture content and 24 h thickness swelling of the fire-retarding bamboo scrimberswere higher than those of the control bamboo scrimbers, and they increased with the increase of impregnation time andmass fraction of fire retardant. The internal bond and modulus of rupture of the fire-retarding bamboo scrimbers were low-er than those of the control bamboo scrimbers, and they decreased gradually with the increase of impregnation time andmass fraction of fire retardant. The effect of mass fraction of fire retardant was remarkable on the physical and mechanicalproperties of bamboo scrimbers. The optimal impregnation time was 120 min, and the mass fraction of fire retardantshould not exceed 30%.