The combustion of polyamide 6 (PA6) fabrics releases toxic smoke, which will pollute the environment and threaten human life and health. Herein, a novel eco-friendly flame-retardant coating was constructed and applied to PA6 fabrics. Needle-like β-FeOOH with a high surface area was firstly constructed onto the surface of PA6 fabrics by the hydrolysis of Fe3+, sulfamic acid (SA) was then introduced by a facile dipping and nipping method. The growth of β-FeOOH also endowed the PA6 fabrics with certain hydrophilicity and moisture permeability, resulting in improved comfortability. The limiting oxygen index (LOI) of the prepared PA6/Fe/6SA sample was increased to 27.2% from 18.5% of control PA6 sample, and the damaged length was reduced to only 6.0?cm from 12.0?cm of control PA6 sample. Meanwhile, the melt dripping was also eliminated. The heat release rate and total heat release values of the PA6/Fe/6SA sample were decreased to 318.5?kW/m2 and 17.0?MJ/m2, respectively, compared with those of control PA6 (494.7?kW/m2 and 21.4?MJ/m2). The analysis results indicated that nonflammable gases diluted flammable gases. The observation of char residues demonstrated that the stable char layer was formed, which effectively inhibited the transfer of heat and oxygen. The organic solvent-free coating does not contain any conventional halogens/phosphorus elements, which provides a useful methodology to produce environmentally friendly flame-retardant fabrics.

锦纶6（PA6）织物燃烧会释放有毒烟雾，污染环境，威胁人类生命健康。在此，构建了一种新型环保阻燃涂层并将其应用于 PA6 织物。首次通过Fe 3+的水解将具有高表面积的针状β-FeOOH构建到PA6织物的表面，然后通过简便的浸渍和夹压方法引入氨基磺酸（SA）。β-FeOOH的生长也赋予了PA6织物一定的亲水性和透湿性，从而提高了舒适性。制备的 PA6/Fe/6SA 样品的极限氧指数 (LOI) 从对照 PA6 样品的 18.5% 增加到 27.2%，并且损伤长度从对照 PA6 样品的 12.0 厘米减少到仅 6.0 厘米。同时也消除了熔滴现象。与对照 PA6（494.7 kW/ m 2和21.4 MJ /米2). 分析结果表明，不可燃气体稀释了可燃气体。焦炭残留物的观察表明形成了稳定的焦炭层，有效地抑制了热量和氧气的传递。不含有机溶剂的涂层不含任何常规的卤素/磷元素，这为生产环保型阻燃织物提供了一种有用的方法。