This work deals with the microencapsulation of di-ammonium hydrogen phosphate (DAHP) in polyurethane using an interfacial polymerization method. The produced microcapsules were characterized by Fourier transform infrared spectroscopy (FTIR), particle size analysis, and scanning electron microscopy (SEM). The fire resistance, flexural (bending) strength, and leaching properties of the impregnated wood were determined and SEM, thermogravimetric analysis (TGA), and FTIR examinations were carried out. Results indicated that as the temperature was increased, weight loss was increased in the DAHP samples, while weight loss occurred in two stages with the microencapsulated DAHP (MCDAHP) samples. The average particle size of the produced microcapsules using PEG400 was measured as 40 µm. According to FTIR results, phosphorus peaks were observed in the MCDAHP samples. Although the DAHP-impregnated samples showed lower thermal stability compared to the control, the samples impregnated with MCDAHP behaved similarly to the control. According to the leaching test results, the fixation of MCDAHP in the wood had increased. According to the limiting oxygen index (LOI) results, fire resistance of the MCDAHP sample was found to be higher than in the DAHP sample. No significant change in mechanical properties was observed in the samples impregnated with DAHP or MCDAHP. The SEM results showed that the microcapsules had covered the entire surface of the wood. According to the FTIR results, the wood samples impregnated with DAHP and MCDAHP reflected the properties of the DAHP and MCDAHP.

这项工作涉及使用界面聚合方法在聚氨酯中微囊化磷酸氢二铵 (DAHP)。通过傅里叶变换红外光谱 (FTIR)、粒度分析和扫描电子显微镜 (SEM) 对制备的微胶囊进行表征。测定了浸渍木材的耐火性、弯曲（弯曲）强度和浸出性能，并进行了 SEM、热重分析 (TGA) 和 FTIR 检测。结果表明，随着温度升高，DAHP 样品的重量损失增加，而微囊化 DAHP (MCDAHP) 样品的重量损失发生在两个阶段。使用PEG400生产的微胶囊的平均粒径测量为40μm。根据 FTIR 结果，在 MCDAHP 样品中观察到磷峰。尽管与对照相比，DAHP 浸渍的样品表现出较低的热稳定性，但 MCDAHP 浸渍的样品表现得与对照相似。根据浸出试验结果，MCDAHP在木材中的固定增加。根据极限氧指数 (LOI) 结果，发现 MCDAHP 样品的耐火性高于 DAHP 样品。在用 DAHP 或 MCDAHP 浸渍的样品中没有观察到机械性能的显着变化。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据FTIR结果，用DAHP和MCDAHP浸渍的木材样品反映了DAHP和MCDAHP的特性。尽管与对照相比，DAHP 浸渍的样品表现出较低的热稳定性，但 MCDAHP 浸渍的样品表现得与对照相似。根据浸出试验结果，MCDAHP在木材中的固定增加。根据极限氧指数 (LOI) 结果，发现 MCDAHP 样品的耐火性高于 DAHP 样品。在用 DAHP 或 MCDAHP 浸渍的样品中没有观察到机械性能的显着变化。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。尽管与对照相比，DAHP 浸渍的样品表现出较低的热稳定性，但 MCDAHP 浸渍的样品表现得与对照相似。根据浸出试验结果，MCDAHP在木材中的固定增加。根据极限氧指数 (LOI) 结果，发现 MCDAHP 样品的耐火性高于 DAHP 样品。在用 DAHP 或 MCDAHP 浸渍的样品中没有观察到机械性能的显着变化。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。MCDAHP 在木材中的固定增加。根据极限氧指数 (LOI) 结果，发现 MCDAHP 样品的耐火性高于 DAHP 样品。在用 DAHP 或 MCDAHP 浸渍的样品中没有观察到机械性能的显着变化。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。MCDAHP 在木材中的固定增加。根据极限氧指数 (LOI) 结果，发现 MCDAHP 样品的耐火性高于 DAHP 样品。在用 DAHP 或 MCDAHP 浸渍的样品中没有观察到机械性能的显着变化。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。SEM 结果表明微胶囊已经覆盖了木材的整个表面。根据 FTIR 结果，用 DAHP 和 MCDAHP 浸渍的木材样品反映了 DAHP 和 MCDAHP 的特性。