There are many defects in the post finishing flame-retardant modification of polyester–cotton (CT) fabric, leading to shortcomings such as single function and low flame-retardant efficiency, which still need to be solved urgently. Herein, a bio-based flame-retardant and antibacterial coating consisting of phytic acid and DL-arginine was deposited on CT fabrics using layer-by-layer assembly to obtain a flame-retardant and antibacterial CT fabric. Fourier transform infrared spectroscopy confirmed that the assembled coating was successful deposited on the CT fabric. The thermogravimetric analysis revealed that the number of bilayers had no significant effect on the degradation temperature of the coated CT fabric; however, it significantly improved the charring effect of the sample, wherein the char rate of the CT fabric coated with 20 bilayers increased from 0.11 to 8.67 wt% compared with uncoated CT fabric at 700°C. In addition, the limiting oxygen index of the CT fabric coated with 20 bilayers increased to 32.0 ± 0.3%. Furthermore, the vertical results revealed that the CT fabric coated with five bilayers attained the UL-94 V-1 grade. The heat release rate (HRR) and the total heat release (THR) of the coated CT fabric were significantly decreased compared to those of the uncoated CT fabric. In particular, the HRR and THR of the CT fabric coated with five bilayers reduced by 28.97% and 30.49%, respectively. Furthermore, the coated CT fabric exhibited an obvious antibacterial effect on Staphylococcus aureus, and the inhibitory ring increased from 0 to 4.0 mm with an increase in bilayers to 20. This study describes a facile method of flame-retardant and antibacterial modification of CT fabric using biological materials.

涤棉（CT）织物后整理阻燃改性存在诸多缺陷，导致功能单一、阻燃效率低等缺点，仍亟待解决。在这里，由植酸和DL-精氨酸组成的生物基阻燃抗菌涂层通过逐层组装沉积在CT织物上，以获得阻燃抗菌CT织物。傅里叶变换红外光谱证实组装的涂层成功沉积在 CT 织物上。热重分析表明，双层的数量对涂层CT织物的降解温度没有显着影响；然而，它显着改善了样品的炭化效果，其中，在 700°C 下，与未涂覆的 CT 织物相比，涂覆有 20 个双层的 CT 织物的炭化率从 0.11 wt% 增加到 8.67 wt%。此外，涂有 20 个双层的 CT 织物的极限氧指数增加到 32.0 ± 0.3%。此外，垂直结果显示，涂有五层双层的 CT 织物达到 UL-94 V-1 等级。与未涂层 CT 织物相比，涂层 CT 织物的热释放率 (HRR) 和总热释放 (THR) 显着降低。特别是涂有五层双层的CT织物的HRR和THR分别降低了28.97%和30.49%。此外，涂层 CT 织物表现出明显的抗菌作用。涂有 20 个双层的 CT 织物的极限氧指数增加到 32.0 ± 0.3%。此外，垂直结果显示，涂有五层双层的 CT 织物达到 UL-94 V-1 等级。与未涂层 CT 织物相比，涂层 CT 织物的热释放率 (HRR) 和总热释放 (THR) 显着降低。特别是涂有五层双层的CT织物的HRR和THR分别降低了28.97%和30.49%。此外，涂层 CT 织物表现出明显的抗菌作用。涂有 20 个双层的 CT 织物的极限氧指数增加到 32.0 ± 0.3%。此外，垂直结果显示，涂有五层双层的 CT 织物达到 UL-94 V-1 等级。与未涂层 CT 织物相比，涂层 CT 织物的热释放率 (HRR) 和总热释放 (THR) 显着降低。特别是涂有五层双层的CT织物的HRR和THR分别降低了28.97%和30.49%。此外，涂层 CT 织物表现出明显的抗菌作用。与未涂层 CT 织物相比，涂层 CT 织物的热释放率 (HRR) 和总热释放 (THR) 显着降低。特别是涂有五层双层的CT织物的HRR和THR分别降低了28.97%和30.49%。此外，涂层 CT 织物表现出明显的抗菌作用。与未涂层 CT 织物相比，涂层 CT 织物的热释放率 (HRR) 和总热释放 (THR) 显着降低。特别是涂有五层双层的CT织物的HRR和THR分别降低了28.97%和30.49%。此外，涂层 CT 织物表现出明显的抗菌作用。金黄色葡萄球菌，抑制环从 0 毫米增加到 4.0 毫米，双层增加到 20。本研究描述了一种使用生物材料对 CT 织物进行阻燃和抗菌改性的简便方法。