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首页> 外文期刊>Construction and Building Materials >Flame retardancy, thermal stability, and hygroscopicity of wood materials modified with melamine and amino trimethylene phosphonic acid
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Flame retardancy, thermal stability, and hygroscopicity of wood materials modified with melamine and amino trimethylene phosphonic acid

机译：用三聚氰胺和氨基三甲基膦酸改性木材的阻燃性，热稳定性和吸湿性

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摘要

Wood is a widely used as a construction material; however, its inflammability limits its applications in the field of construction. Moreover, high loadings of flame retardants typically required for wood impregnation in fire safety treatments cause increased hygroscopicity and non-durable flame retardance. In this study, melamine (MEL) was impregnated in the porous structure of the wood, in combination with an organic phosphoric acid (AP). Flammability characterization in terms of limiting oxygen index (LOI) and cone calorimetry tests revealed significant improvement in fire resistance of the samples due to the presence of MEL/AP in the porous structure of the wood, synthesized in situ in the wood channel with 2 wt% MEL and 25 wt% AP solutions using a two-step method. The LOI value increased from 21.0% to 68.5%, and the peak-heat-release rate and total-heat-release reduced by 41.7% and 80.2%, respectively, compared with that of the control sample. The MEL/AP synthesized in the porous wood structure improved flame retardancy, durability, and hygroscopicity. The proximity of the ammonia gas-release and wood decomposition temperatures along with the effectively formed cohesive protective and bubble-shaped-char layer enhanced the flame-retardant properties. (C) 2020 Elsevier Ltd. All rights reserved.
机译：木材是广泛用作建筑材料;然而，其易燃性限制了其在建设领域的应用。此外，在消防安全处理中通常需要木材浸渍所需的阻燃剂的高负荷导致吸湿性和不耐用的阻燃性增加。在该研究中，将三聚氰胺（MEL）浸渍在木材的多孔结构中，与有机磷酸（AP）组合。在限制氧气指数（LOI）和锥形量热试验方面的可燃性表征揭示了由于木材的多孔结构中MEL / AP的样品的耐火性显着改善，原位在木通道中合成，其中2重杆使用两步法，％MEL和25wt％AP解决方案。与对照样品相比，LOI值增加到21.0％至68.5％，峰 - 热释放速率和总热释放的总热释放率降低了41.7％和80.2％。在多孔木结构中合成的MEL / AP改善了阻燃性，耐久性和吸湿性。氨气释放和木材分解温度的接近随着有效形成的粘性保护和气泡形状炭层增强了阻燃性能。 （c）2020 elestvier有限公司保留所有权利。

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