膨胀型透明防火涂料紫外加速老化性能研究  

Accelerated UV ageing behaviors of transparent intumescent fire-retardant coatings

作　　者：颜龙[1] 唐欣雨 谢晓江 徐志胜[1] YAN Long;TANG Xin-yu;XIE Xiao-jiang;XU Zhi-sheng(School of Civil Engineering,Zhongnan University,Hunan Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《消防科学与技术》2021年第12期1800-1803,共4页Fire Science and Technology

基　　金：国家自然科学基金项目(51906261);湖南省重点研发计划项目(2020SK2057)。

摘　　要：为研究膨胀型透明防火涂料的老化性能,利用紫外加速老化实验箱对氨基类膨胀型透明防火涂料进行了不同老化周期的测试,对涂层老化前后的外观形貌、附着力、耐火性能以及炭层结构进行了表征。结果表明,老化后涂层表面出现一定程度的裂纹和起泡现象,导致涂层完整性和耐火性能下降。聚乙二醇硼酸酯(PEG-BA)的引入有利于减缓涂层老化过程中的开裂、起泡和粉化现象,进而赋予涂层更佳的抗老化性能。涂层抗老化性能与PEG-BA含量密切相关,其中含20%PEG-BA的透明防火涂料经历11周期老化测试后附着力等级仍达到2B级、背部稳定温度低至184.1℃,表现出最佳的抗老化性能。UV accelerated aging test was applied to analyze the influence of ageing conditions on the morphology,adhesion classification,fire resistance and char formation of amino transparent intumescent fire-retardant coatings.The results showed that the coatings appear obvious cracks and bubbles after ageing treatment,accompanying with the degradation of structural integrity and fire resistance.The incorporation of polyethylene glycol borate(PEG-BA)is beneficial to decrease the cracking,blistering and powdering of the coatings,thus imparting superior durability of fire resistance to the resulting coatings.The aging resistance performance of the coatings depends on the content of PEG-BA.When 20% PEG-BA is added,the resulting coating shows the adhesion classification of 2 B rating and the equilibrium backside temperature of 184.1 ℃ after 11 aging cycles,corresponding to the best anti-aging performance.

关 键 词：膨胀透明型防火涂料 聚乙二醇硼酸酯 耐火时间 抗老化性能 附着力等级 

分 类 号：X932[环境科学与工程—安全科学] TU561.66[建筑科学—建筑技术科学]