Improving the flame retardancy of furfurylated wood by introducing DOPO
Improving the flame retardancy of furfurylated wood by introducing DOPO
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DOI：
10.1007/s00226-023-01513-2
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发表时间：
2023-12
影响因子：
3.4
通讯作者：
Youming Dong;Zhenyu Fu;Yutao Yan;Jingbo Shi;Mark Hughes;Xianxu Zhan;Jianzhang Li
中科院分区：
文献类型：
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作者：
Youming Dong;Zhenyu Fu;Yutao Yan;Jingbo Shi;Mark Hughes;Xianxu Zhan;Jianzhang Li
尺寸稳定性差、对微生物敏感和易燃性限制了木材在这些特性至关重要的某些领域的应用。尽管糠基化可以改善木材的物理和机械性能，但糠基化木材在燃烧过程中释放的热量和烟雾非常显着，需要解决。 9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）及其衍生物作为一种无卤磷系阻燃剂，在聚合物复合材料中表现出优异的性能。在这项研究中，DOPO 溶解在糠醇 (FA) 中并用于改性木材。研究了DOPO对糠酸化木材的热稳定性、燃烧行为以及物理机械性能的影响。还对化学结构、形态和燃烧后的残炭进行了表征。研究表明，DOPO 可以与 FA 聚合物发生反应，并融入并均匀分散在木质结构中。与未经处理的木材相比，糠化木材在燃烧过程中释放出更高的热量和烟雾。 DOPO的添加显着降低了糠化木材的热释放，并且这种效果随着DOPO量的增加而增强。当糠酸化木材中DOPO引入量为7%时，其总放热量减少了37.4%，与未经处理的木材相当。然而，DOPO 并不能有效抑制烟雾的产生。 DOPO 通过促进炭的形成并抑制氧气的扩散和热解产物的逸出来提高糠酸化木材的热稳定性。 DOPO的添加对糠酸化木材的物理机械性能影响不大。结果表明，DOPO 和糠酰化的结合可能是制备高度稳定和耐火木质材料的有效方法。
Poor dimensional stability, sensitivity to microorganisms, and flammability restrict the application of wood in certain areas where these properties are critical. Although furfurylation can improve the physical and mechanical properties of wood, the heat and smoke release of furfurylated wood during combustion are dramatic and need to be addressed. As a kind of halogen-free phosphorus flame retardant, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and its derivatives exhibit excellent performance in polymer composites. In this study, DOPO was dissolved in furfuryl alcohol (FA) and used to modify wood. The effect of DOPO on the thermal stability, combustion behavior, and physical and mechanical properties of furfurylated wood was investigated. The chemical structure, morphology, and char residue after combustion were also characterized. The studies show that DOPO can react with the FA polymer and is incorporated and homogeneously dispersed in the wood structure. Compared to untreated wood, furfurylated wood has a much higher heat and smoke release during combustion. The addition of DOPO remarkably reduces the heat release of furfurylated wood, and this effect increases as the amount of DOPO increases. When the amount of introduced DOPO of furfurylated wood is 7%, its total heat release is reduced by 37.4% and becomes comparable to the untreated wood. However, DOPO does not suppress smoke production effectively. DOPO improves the thermal stability of furfurylated wood by promoting char formation and inhibiting the diffusion of oxygen and the escape of pyrolysis products. The addition of DOPO has little effect on the physical and mechanical properties of furfurylated wood. The results indicate that the combination of DOPO and furfurylation could be an efficient way to prepare highly stable and fire-resistant wood materials.