Jiang Sihong, Wang Jihu, Wen Shaoguo, Chen Kaimin, Zhou Jianlong, Wang Haopeng, Deng Xuying
College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
MeToo New Materials Technology (Shanghai) Co., Ltd., Shanghai 201605, China.
Polymers (Basel). 2024 Aug 15;16(16):2302. doi: 10.3390/polym16162302.
Due to their ability to prevent or slow the spread of fires, fire-retardant coatings are utilized as the main means of fire protection for steel structures, combining easy application and high economic efficiency. This study investigates the effects of the particle size and dosage of expanded vermiculite (EV) on the fire resistance and application performance of coatings. Ammonium polyphosphate, melamine, and pentaerythritol were used as intumescent fire-retardant systems, along with waterborne hydroxyl-modified acrylic resins as the film-forming substances. The properties of fire resistance coatings were tested via scanning electron microscope (SEM), X-ray diffractometry (XRD), thermogravimetric analysis (TGA), limiting oxygen index (LOI), and cone calorimetry. The excellent fire performance of the coatings with 3 wt.% 300-mesh EV was proven, exhibiting a relative expansion of 30.43 times. Moreover, the surface structure of the charcoal layer was dense. The total smoke production (TSP) and smoke concentration (TSR) were only 0.18 m and 0.25 m/m.
由于具有阻止或减缓火势蔓延的能力，防火涂料作为钢结构防火的主要手段被广泛应用，具有施工简便和经济效益高的特点。本研究探讨了膨胀蛭石（EV）的粒径和用量对涂料耐火性能及施工性能的影响。采用聚磷酸铵、三聚氰胺和季戊四醇作为膨胀型阻燃体系，并使用水性羟基改性丙烯酸树脂作为成膜物质。通过扫描电子显微镜（SEM）、X射线衍射仪（XRD）、热重分析（TGA）、极限氧指数（LOI）和锥形量热法对防火涂料的性能进行了测试。结果表明，添加3 wt.% 300目EV的涂料具有优异的防火性能，相对膨胀倍数为30.43倍。此外，炭层表面结构致密。总产烟量（TSP）和烟浓度（TSR）分别仅为0.18 m和0.25 m/m。
