The effects of nano-sepiolite (NS) on fire properties of unheated and heat-treated fir wood were studied using a newly developed apparatus. Separate sets of specimens were prepared to be painted with plain acrylic-latex paint and NS-treated paint as well. Heat treatment of specimens was carried out in a laboratory oven at 185 ºC and under atmospheric air pressure. Six fire properties were measured including times to onset of ignition and glowing, as well as back-darkening and back-holing times. Two properties of mass loss and burnt area were measured once the fire was extinguished and the test on each specimen terminated. Results demonstrated significant improvement in fire properties of NS. The improvement was partially attributed to the mineral nature of sepiolite with low chemical reactivity, acting as an insulating layer towards the penetration of fire to the wood substrate. The improvement in fire properties was also partially attributed to the high thermal conductivity coefficient of sepiolite, delaying the accumulation of heat at the point nearest to the piloted fire to reach ignition point. Heat treatment did not significantly affect fire properties in unpainted specimens. However, fire properties in the painted heat-treated specimens (with both plain paint, and NS-treated paint) tended to decrease, though the values were still significantly higher than those of unpainted heat-treated specimens. FTIR spectra illustrated significant alteration in intensities at wave numbers 3100 cm⁻¹ and 1,00 cm⁻¹, related to the hydroxyl groups of cell-wall polymers (mostly hemicelluloses). These alterations had a negative effect on the adhesion of the water-based paint used in this study. It was concluded that nano-sepiolite has a promising future as a fire retardant. However, as cost is of vital importance for paint manufacturers, further studies on the effects of sepiolite at micron-scale available at a lower price should also be carried out.

使用新开发的设备研究了纳米海泡石（NS）对未经加热和热处理的杉木的防火性能的影响。准备了单独的几套标本，分别用普通的丙烯酸-乳胶漆和NS处理过的油漆上漆。在185°C的实验室烘箱中和大气压下对样品进行热处理。测量了六种火属性，包括起火和发光的时间，以及变暗和变空的时间。熄灭大火并终止每个样品的测试后，将测量质量损失和燃烧面积的两个属性。结果表明，NS的防火性能有了显着改善。这种改善部分归因于海泡石的矿物性质，具有较低的化学反应性，充当隔热层，防止火穿透到木质基材上。燃烧性能的改善也部分归因于海泡石的高导热系数，从而延迟了最靠近引燃火焰的点处的热量积聚，直至到达着火点。热处理并未显着影响未上漆样品的燃烧性能。但是，涂漆的热处理试样（包括普通涂料和NS涂料）的着火性能趋于下降，尽管该数值仍显着高于未涂漆的热处理试样。FTIR光谱表明在3100 cm波数处强度发生了显着变化 燃烧性能的改善也部分归因于海泡石的高导热系数，从而延迟了最靠近引燃火焰的点处的热量积聚，直至到达着火点。热处理并未显着影响未上漆样品的燃烧性能。但是，涂漆的热处理试样（包括普通涂料和NS涂料）的着火性能趋于下降，尽管该数值仍显着高于未涂漆的热处理试样。FTIR光谱表明在3100 cm波数处强度发生了显着变化 燃烧性能的改善也部分归因于海泡石的高导热系数，从而延迟了最靠近引燃火焰的点处的热量积聚，直至到达着火点。热处理并未显着影响未上漆样品的燃烧性能。但是，涂漆的热处理试样（包括普通涂料和NS涂料）的着火性能趋于下降，尽管该数值仍显着高于未涂漆的热处理试样。FTIR光谱表明在3100 cm波数处强度发生了显着变化 涂漆的热处理试样（包括普通涂料和NS涂料）的耐火性能趋于下降，尽管该值仍显着高于未涂漆的热处理试样。FTIR光谱表明在3100 cm波数处强度发生了显着变化 涂漆的热处理试样（包括普通涂料和NS涂料）的耐火性能趋于下降，尽管该值仍显着高于未涂漆的热处理试样。FTIR光谱表明在3100 cm波数处强度发生了显着变化^-1和1,00 cm ^-1，与细胞壁聚合物（主要是半纤维素）的羟基有关。这些变化对本研究中使用的水性涂料的附着力有负面影响。结论是，纳米海泡石作为阻燃剂具有广阔的前景。但是，由于成本对涂料制造商至关重要，因此还应该对以更低的价格获得的微米级海泡石效果进行进一步的研究。