摘要
为提高膨胀型防火涂料的阻燃与抑烟性能,以聚磷酸铵-季戊四醇-三聚氰胺为膨胀阻燃剂、蛤蜊壳生物填料作为协效剂制备膨胀型防火涂料,通过小室法、模拟大板法、烟密度试验、热重分析(TGA)法、扫描电镜(SEM)和元素分析等,研究蛤蜊壳生物填料的含量对膨胀型防火涂料的阻燃和抑烟性能的影响。结果表明:添加蛤蜊壳生物填料可以有效提高膨胀型防火涂料的阻燃和抑烟性能,表现出较好的协效阻燃和抑烟作用;但过量的生物填料会降低其在膨胀型防火涂料中的协效作用,添加质量分数为2%的蛤蜊壳生物填料表现出最优的协效阻燃和抑烟性能;蛤蜊壳生物填料的加入可以促进膨胀阻燃体系在燃烧过程中形成更多的交联结构以增强炭层的致密性和隔热性能,进而使涂层显现出较高的热稳定性和成炭率,添加质量分数为2%蛤蜊壳生物填料的涂层在800℃下的残炭量高达33.7%。
In order to improve its flame retardancy and smoke suppression properties,an intumescent fireproof coating was prepared by using ammonium polyphosphate-pentaerythritol-melamine as an intumescent flame retardant and a clam shell bio-filler as a synergist.Then,effects of clam shell filler on flame retardancy and smoke suppression properties were analyzed by cabinet method test,big panel method,smoke density test,thermogravimetric analysis(TGA),scanning electron microscopy(SEM)and elemental analysis.The results show that addition of such filler can synergistically improve flame retardancy and smoke suppression of intumescent coatings,which will be best when added fillerg content is 2%,but will diminish for an excessive addition.Presence of clam shell filler can promote formation of more cross-linking structures during burning process and therefore enhance compactness and thermal insulation of intumescent char,thus exhibiting superior thermal stability and char-forming ability.And char residue of coatings will reach as high as 33.7%at 800℃while adding 2%of filler.
作者
李耀庄
冯钰微
徐志胜
颜龙
贾宏煜
LI Yaozhuang;FENG Yuwei;XU Zhisheng;YAN Long;JIA Hongyu(Institute of Disaster Prevention Science and Safety Technology,Central South University,Changsha Hunan 410075,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2020年第7期41-47,共7页
China Safety Science Journal
基金
国家自然科学基金资助(51676210,51906261)
湖南省自然科学基金资助(2018JJ3668)。
关键词
蛤蜊壳
膨胀型防火涂料
阻燃性能
抑烟性能
协效作用
clam shell
intumescent fire-retardant coating
flame retardancy
smoke suppression
synergistic effect
