To improve the foam stability and fire extinguishing efficiency of fluorine-free foam (FFF) extinguishing agents, xanthan gum (XG) and carbon nanotubes (CNTs) were selected as the foam stabilizer agents in this study to investigate their effects on the physical and chemical properties and fire suppression effectiveness of FFF system. The effects of the four factors, namely, α-olefin sulfonic acid Salts (AOS), YT-Y762, XG, and CNTs, on the foam performance were investigated using L₉(3⁴) orthogonal design method. Three FFF solutions were selected based on the following four parameters: surface tension, 25% drainage time, foam height, and viscosity. The physicochemical properties, fire extinguishing, and burnback performance of the three FFF solutions were investigated. The results indicated that XG and CNTs have synergistic effects on the FFF solution, and the addition of 0.2 wt% of XG and 0.4 wt% of CNTs increased the 25 % drainage time by 81.40 %. The fire extinguishing performance was effectively improved. The results show the potential application of carbon nanotubes in FFF extinguishing agents.

为了提高无氟泡沫（FFF）灭火剂的泡沫稳定性和灭火效率，本研究选择黄原胶（XG）和碳纳米管（CNTs）作为泡沫稳定剂，研究其对泡沫的物理和化学作用的影响。 FFF系统的特性和灭火效果。_{采用L 9} (3 ^{4 )正交设计方法研究了}α-烯烃磺酸盐(AOS)、YT-Y762、XG和CNTs这四个因素对泡沫性能的影响。根据以下四个参数选择了三种 FFF 解决方案：表面张力、25% 排水时间、泡沫高度和粘度。研究了三种 FFF 溶液的理化性质、灭火和回烧性能。结果表明，XG和CNTs对FFF溶液具有协同作用，添加0.2 wt%的XG和0.4 wt%的CNTs使25%滤水时间增加了81.40%。有效提高了灭火性能。结果表明碳纳米管在 FFF 灭火剂中的潜在应用。