The inherent moisture absorption and flammability of wood can diminish its practical application value. In this research, a phytic acid-based flame retardant (PM) was synthesized by a hydrothermal method. Iron ions-doped phytic acid-based nanosheets (PM-Fe) deposited on wood surface by vacuum impregnation. Subsequently, the wood was hydrophobically modified with octadecylamine (OA), resulting in the successful fabrication of superhydrophobic and flame-retardant composite wood (PM-Fe/OA/wood). The influence of various coating components on the wettability, heat, and flame retardancy properties of composite wood was examined through water contact angle (WCA), vertical burning tests (UL-94)， limiting oxygen index (LOI), and a cone calorimetry test. The results indicated that the WCA of PM-Fe/OA/wood was 154.9°. The composite wood possessed exceptional contamination resistance and self-cleaning properties due to its superhydrophobic surface. Furthermore, due to the dry surface of PM-Fe/OA/wood, it exhibited superior resistance to mold in comparison to natural wood. The combustion test results indicated that PM-Fe/OA wood exhibited an extremely short time to self-extinguish, achieving V-0 rating. It had a LOI value of 38.6%. Additionally, in the cone calorimetry test, the peak heat release rate (PHRR) and total heat release (THR) of composite wood were reduced by 56.6% and 52.2%, respectively. In summary, this work provides an attractive strategy for obtaining wood with superhydrophobic and flame-retardant properties, which enhances its practical application value.

中文翻译：

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铁离子掺杂植酸基纳米片制备多功能阻燃超疏水复合木材

木材固有的吸湿性和易燃性会降低其实际应用价值。本研究采用水热法合成了植酸基阻燃剂（PM）。通过真空浸渍将铁离子掺杂的植酸基纳米片（PM-Fe）沉积在木材表面。随后，用十八胺（OA）对木材进行疏水改性，成功制备出超疏水阻燃复合木材（PM-Fe/OA/木材）。通过水接触角（WCA）、垂直燃烧试验（UL-94）、极限氧指数（LOI）和锥形量热试验考察了不同涂料组分对复合木材润湿性、耐热性和阻燃性能的影响。结果表明，PM-Fe/OA/木材的WCA为154.9°。由于其超疏水表面，复合木材具有出色的抗污染性和自清洁性能。此外，由于 PM-Fe/OA/木材的干燥表面，与天然木材相比，它表现出优异的抗霉性。燃烧测试结果表明，PM-Fe/OA 木材表现出极短的自熄时间，达到 V-0 等级。其LOI值为38.6%。此外，在锥形量热测试中，复合木材的峰值放热量（PHRR）和总放热量（THR）分别降低了56.6%和52.2%。总之，这项工作为获得具有超疏水和阻燃性能的木材提供了一种有吸引力的策略，从而增强了其实际应用价值。