Abstract: In recent years, the fire risk associated with textile combustion has increasingly drawn people's attention, leading to higher demands for flame-retardant safety in textiles. Polyester (PET) possesses properties such as high strength, high temperature resistance, abrasion resistance, corrosion resistance, and light resistance. Therefore, it has been widely used in military, agricultural, industrial,and textile fields.However, PET fabrics are highly flammable and generate toxic gases and dense smoke when burned,causing significant loss to human life and property. This exacerbates the hazards of fires. Consequently, conferring good flame retardancy and smoke suppression properties to PET fabrics holds great practical significance and application value in achieving low-smoke, halogen-free flame retardancy in PET textiles.
Graphene is a two-dimensional (2D) honeycomb nano-material composed of sp2-hybridized carbon atoms. It has garnered considerable attention due to its well-known properties, including superior mechanical strength, extremely high carrier mobility, and excellent thermal conductivity. Graphene has been successfully applied in various fields. Particularly, graphene exhibits high thermal stability. Compared to existing flame retardants, graphene and its derivative, reduced graphene oxide (RGO), are considered environmentally friendly halogen-free flame retardants that can improve the flame retardancy of polymer composites. However, the flame retardant effect of a single agent is limited, especially in suppressing the dense smoke generated during the combustion of PET. The inhibitory effect of graphene-based flame retardants is not ideal. To address this, we introduce molybdenum disulfide nano-materials. Molybdenum disulfide nano-materials prepared by hydrothermal method exhibit excellent thermal stability and can maintain the stability of the layered structure at higher temperatures, thus exerting the barrier effect of the layered structure. The transition metal molybdenum promotes the formation of a char layer during fabric combustion, accelerating the formation of a dense carbon layer, which acts as a physical barrier, slowing down the heat and mass transfer during the combustion process, and improving the flame retardancy of the fabric. Additionally, molybdenum elements can suppress smoke, effectively reducing the toxicity and smoke density of the fabric during combustion, thereby providing more valuable time for fire escape and rescue.
A MoS2/reduced graphene oxide (MoS2/RGO) composite material was prepared using a hydrothermal method, and the PET fabric was then treated by an immersion-rolling process. The structure and properties of the MoS2/RGO composite material and the MoS2/RGO-modified PET fabric were characterized using scanning electron microscopy, transmission electron microscopy, Raman spectroscopy,infrared spectroscopy,smoke density chamber, and cone calorimeter.The results showed that the MoS2/RGO composite material was well coated on the fabric. The thermal stability of the treated PET fabric was significantly improved, with a 35% increase in residual char yield compared to pure PET fabric at 700℃. The limiting oxygen index of the fabric modified with MoS2/RGO reached 28.2%, which was 8.9% higher than that of pure PET. The total heat release rate decreased by 60.5% compared to pure PET fabric, and the smoke density was reduced by 56.9% compared to the pure fabric. The modified fabric achieved self-extinguishment in vertical burning tests,and the char length decreased to 10.6 cm. After treatment,the contact angle of the PET fabric decreased to 0° at 2.2 s, effectively improving the wearing comfort of PET.

Key words: MoS2/RGO, flame retardant treatment, smoke suppression, PET fabric, hydrothermal method, immersion-rolling

摘要： 为了赋予涤纶(PET)织物良好的阻燃、抑烟性能，实现PET织物的低烟、无卤阻燃，采用浸轧工艺，用水热法制备二硫化钼/还原氧化石墨烯(MoS2/RGO)复合材料，并将其用于PET织物的阻燃整理。采用扫描电子显微镜、红外光谱仪以及X射线衍射仪等对MoS2/RGO复合材料以及MoS2/RGO/PET织物的微观形貌与化学结构进行分析；采用垂直燃烧测试仪、烟雾密度箱、接触角仪等对MoS2/RGO/PET织物的阻燃、抑烟性能以及亲水性能进行表征与测试。结果表明：MoS2/RGO复合材料在织物上能够形成良好包覆，且能够有效提高PET织物的热稳定性，在700 ℃时，其残炭率较纯织物提升34.9%；MoS2/RGO/PET织物的极限氧指数可提升至28.2%，总热释放量较纯PET织物下降60.5%，烟雾密度降低59.9%，具有良好的自熄性能，损毁长度可降低至10.6 cm；此外，MoS2/RGO复合材料可以赋予PET织物良好的亲水性能，在2.2 s时接触角变为0°，有效改善了PET织物的服用舒适性能。

关键词: 二硫化钼/还原氧化石墨烯(MoS2/RGO), 阻燃整理, 抑烟, PET织物, 水热法, 浸轧