户外耐烃类火灾膨胀型隧道防火涂料的制备及性能研究  

Study on preparation and performance of intumescent fire retardant coating for tunnel lining against hydrocarbon fire outdoors

作　　者：颜龙[1] 徐志胜[1] 

机构地区：[1]中南大学防灾科学与安全技术研究所,湖南长沙410075

出　　处：《中国安全生产科学技术》2014年第10期118-123,共6页Journal of Safety Science and Technology

基　　金：湖南省研究生科研创新项目资助;湖南省科技厅重点资助项目(2013SK2004)

摘　　要：针对隧道防火要求,开发一种可用于户外环境下保护隧道混凝土结构的耐烃类火灾的NPD型膨胀隧道防火涂料,并对硅丙乳液和纳米二氧化钛(TiO2)用量对涂料性能的影响进行了讨论。结果表明:硅丙乳液和纳米TiO2的加入提高了防火涂料的粘结强度和耐水性能,其中分别添加质量百分数为25%、0.9%的硅丙乳液和纳米TiO2后涂料的性能达到最优。添加质量百分数为25%硅丙乳液后,涂料的粘结强度和耐水极限分别达到0.20MPa和14天;而添加0.9%的纳米TiO2后涂料的粘结强度提高到0.35MPa,耐水极限达到24天,耐火极限还从148min提高到173min。对自制样品与市购产品防火性能及其他理化性能测试比较,可知该产品的综合性能优于市购同类产品,耐火极限还远高于国家标准的90min,达到180min。In order to satisfy the requests of fireproofing in tunnel lining, an NPD-based intumescent fire retardant coating was developed, which could be used in outdoors to protect concrete structures in case of hydrocarbon fire. The influences of Silicone acrylic emulsion and nano-TiO2 on the performance of flame retardant coating were investigated. The results showed that the cohesive strength and water resistance were the best when the content of Silicone acrylic emulsion and nano-TiO2 were 25% and 0.9% respectively. When mass fraction of Silicone acrylic emulsion was 25%., the cohesive strength and water resistance of NPD-based flame retardant coatings were 0.20Mpa and 14 days respectively. When mass fraction of nano-TiO2 was 0.9% , the cohesive strength, water resistance and fire resistance of NPD-based flame retardant coating were 0.35Mpa, 24 days and 173rain respectively. Comparing the self-made sample with commercial products in terms of the fire resistance and physical properties, it indicated that the performance of NPD-based fire retardant coating was superior to the similar commercial products. Meanwhile, the performance of NPD-based fire retardant coating reached the level of national standards while the fire resistance reached 180min, which was higher than national standards request of 90min.

关 键 词：膨胀型防火涂料 烃类火 混凝土结构 硅丙乳液 纳米TIO2 

分 类 号：X932[环境科学与工程—安全科学]