水性超薄型防火涂料紫外加速老化性能研究
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摘要
为了研究水性超薄型防火涂料老化后的性能,利用紫外加速老化实验箱对聚乙烯醇基水性超薄型防火涂料进行了不同时间的老化测试,并利用膨胀涂料防火性能快速测试仪、傅里叶红外光谱分析仪、X射线光电子能谱仪对其进行了理化性能测试。结果表明:老化后涂层表面的颜色加深、粗糙程度增加、完整性变差;由于涂层厚度减薄、大量裂痕的存在、阻燃体系失去协同膨胀效果等原因,老化后试样的耐火性能降低;老化时间越长,试样的耐火性能和炭层膨胀倍率降低得越显著。机理分析认为,涂层在老化过程中,膨胀阻燃组分发生氧化、降解、水解等反应,同时由于基料聚乙烯醇的水解作用加快了涂层的老化损失速率。
The aging properties of the waterborne ultra-thin polyvinyl alcohol-based fire retardant coatings were studied under UV accelerated aging condition. Meanwhile,the physical properties of the coatings were investigated by fire resistance tester,FT-IR and XPS. The results showed that the color,roughness and integrity of the coating surface were changed after aging test. The fire resistance of the aged samples decreased due to the combined effect of the thinning of the coating layer,existence of the cracks and the loss of the synergistic effect. And with the increase of aging time,the fire resistance time and the char layer expansion rate of the samples decreased significantly. The aging mechanism of the coating indicated that the components had oxidation,degradation and hydrolysis reactions. At the same time,the aging rate of the coating was accelerated due to the hydrolysis of the polyvinyl alcohol.
The aging properties of the waterborne ultra-thin polyvinyl alcohol-based fire retardant coatings were studied under UV accelerated aging condition. Meanwhile,the physical properties of the coatings were investigated by fire resistance tester,FT-IR and XPS. The results showed that the color,roughness and integrity of the coating surface were changed after aging test. The fire resistance of the aged samples decreased due to the combined effect of the thinning of the coating layer,existence of the cracks and the loss of the synergistic effect. And with the increase of aging time,the fire resistance time and the char layer expansion rate of the samples decreased significantly. The aging mechanism of the coating indicated that the components had oxidation,degradation and hydrolysis reactions. At the same time,the aging rate of the coating was accelerated due to the hydrolysis of the polyvinyl alcohol.
引文
[1]WEILE D.Fire-protective and flame-retardant coatings-a state-of-the-art review[J].Journal of Fire Science,2011,29,259-296.
[2]秦秀兰,黄英,杜朝峰.膨胀型钢结构防火涂料的发展现状与展望[J].材料保护,2006,39(8):47-50.
[3]范方强.水性超薄型钢结构防火涂料的制备及防火作用机理研究[D].广州:华南理工大学,2013.
[4]陈中华,李崇裔.水性超薄型钢结构防火涂料的研制与性能研究[J].涂料工业,2011,41(4):26-30.
[5]张建军,曾嘉伟,史聪灵,等.室内超薄膨胀型钢结构防火涂料的研制及防火机理分析[J].消防技术与产品信息,2017(2):8-12.
[6]熊家锦,师华,王富森,等.水基薄膜型膨胀防火涂料的研究[J].涂料技术与文摘,2016,37(11):2-8.
[7]何华俊,廖定根,方超.水性超薄型钢结构防火涂料的研究[J].消防科学与技术,2016,35(11):1593-1595.
[8]李清英.水性超薄型钢结构防火涂料的研制[D].广州:华南理工大学,2013.
[9]王新钢,张泽江,孟东伟,等.水性透明木材防火涂料研究[J].消防科学与技术,2016,35(11):1587-1590.
[10]SAKUMOTO Y,NAGATA J,KODAIRA A,et al.Durability evaluation of intumescent coating for steel frames[J].Journal of Material in Civil Engineering,2001(13):274-281.
[11]ROBERTS T A,SHIRVILL L C,WATERTON K,et al.Fire resistance of passive fire protection coatings after longterm weathering[J].Process Safety and Environmental Protection,2010,88:1-19.
[12]WANG L L,WANG Y C,LI G Q.Experimental study of hydrothermal aging effects on insulative properties of intumescent coating for steel elements[J].Fire Safety Journal,2013,55:168-181.
[13]中国航空工业第一集团公司北京航空材料研究院.用于膨胀防火涂料现场检测的电炉和检测方法:200610167761.1[P].2007-06-06.
[14]王婧,苑会林,霍艳丽.聚乙烯醇的热老化机理研究[J].北京化工大学学报,2005,32(2):68-71.
[15]MORUYAMA K,KURAMOTO Y,YAGI M,et al.Extraction of absorption spectra of some polyenes produced in poly(vinyl alcohol)film utilizing photodegradations by monochromatic light[J].Polymer,1988,29(1):24-28.
[16]RAO B S,MURTHY M R.Electron spin resonance study ofγ-irradiated poly(acrylic acid)[J].Journal of Polymer Science Part B:Polymer Physics,1989,27(6):1187-1194.
[2]秦秀兰,黄英,杜朝峰.膨胀型钢结构防火涂料的发展现状与展望[J].材料保护,2006,39(8):47-50.
[3]范方强.水性超薄型钢结构防火涂料的制备及防火作用机理研究[D].广州:华南理工大学,2013.
[4]陈中华,李崇裔.水性超薄型钢结构防火涂料的研制与性能研究[J].涂料工业,2011,41(4):26-30.
[5]张建军,曾嘉伟,史聪灵,等.室内超薄膨胀型钢结构防火涂料的研制及防火机理分析[J].消防技术与产品信息,2017(2):8-12.
[6]熊家锦,师华,王富森,等.水基薄膜型膨胀防火涂料的研究[J].涂料技术与文摘,2016,37(11):2-8.
[7]何华俊,廖定根,方超.水性超薄型钢结构防火涂料的研究[J].消防科学与技术,2016,35(11):1593-1595.
[8]李清英.水性超薄型钢结构防火涂料的研制[D].广州:华南理工大学,2013.
[9]王新钢,张泽江,孟东伟,等.水性透明木材防火涂料研究[J].消防科学与技术,2016,35(11):1587-1590.
[10]SAKUMOTO Y,NAGATA J,KODAIRA A,et al.Durability evaluation of intumescent coating for steel frames[J].Journal of Material in Civil Engineering,2001(13):274-281.
[11]ROBERTS T A,SHIRVILL L C,WATERTON K,et al.Fire resistance of passive fire protection coatings after longterm weathering[J].Process Safety and Environmental Protection,2010,88:1-19.
[12]WANG L L,WANG Y C,LI G Q.Experimental study of hydrothermal aging effects on insulative properties of intumescent coating for steel elements[J].Fire Safety Journal,2013,55:168-181.
[13]中国航空工业第一集团公司北京航空材料研究院.用于膨胀防火涂料现场检测的电炉和检测方法:200610167761.1[P].2007-06-06.
[14]王婧,苑会林,霍艳丽.聚乙烯醇的热老化机理研究[J].北京化工大学学报,2005,32(2):68-71.
[15]MORUYAMA K,KURAMOTO Y,YAGI M,et al.Extraction of absorption spectra of some polyenes produced in poly(vinyl alcohol)film utilizing photodegradations by monochromatic light[J].Polymer,1988,29(1):24-28.
[16]RAO B S,MURTHY M R.Electron spin resonance study ofγ-irradiated poly(acrylic acid)[J].Journal of Polymer Science Part B:Polymer Physics,1989,27(6):1187-1194.