摘要
以氯化钡提纯k-卡拉胶,经过氧化氢降解,通过反相乳液聚合的方式制备了一系列卡拉胶包覆聚磷酸铵(APP)阻燃微球(k-CM/APP);将其加入到水性环氧树脂(EP)中,制备了3种钢结构防火涂层EP2,EP3和EP4.利用红外光谱(IR)、扫描电子显微镜(SEM)及元素分析(EDS)对k-CM/APP的结构及形貌进行了表征.利用极限氧指数(LOI)、垂直燃烧(UL-94)、背温测试法、热重分析(TG)、锥形量热(CONE)、附着力测试、IR和SEM等方法分析了涂层的阻燃、隔热及力学性能.结果表明,k-CM/APP(3/1)球形结构完整,800℃时的残炭量高达59. 5%.与其它阻燃涂层体系相比,添加了k-CM/APP (3/1)的EP3防火涂层的极限氧指数达到28. 5%,UL-94达到了V-0级,60 min防火涂层耐火温度为253℃.相比于纯EP涂层,EP3涂层的热释放速率峰值降低了58. 26%,总热释放量降低了20. 84%,附着力达到8. 74 MPa.
After k -carrageenan was purified by barium chloride and degraded by hydrogen oxidation, a series of k -carrageenan/ammonium polyphosphate( k -CM/APP) inflame-retardant microsphere was prepared using inverse emulsion polymerization method. Then k -CM/APP was added to water-borne epoxy resin to prepare EP2, EP3, EP4 steel structure fire retardant coating. The structure and morphology of k -CM/APP were represented by using infrared spectrograph(IR), scanning electron microscope(SEM), energy dispersive spectrometry(EDS). The limit oxygen index(LOI), vertical combustion(UL-94), back temperature test method, thermogravimetry(TG), cone calorimeter, adhesion tester, IR and SEM were used for analyzing the flame retardant property, heat-insulating property, thermal property and mechanical property. Research results showed that k -CM/APP spherical structure was complete, and the carbon residue at 800 ℃ reached 59.5%. Compared with other fire retardant coatings, the LOI of the EP3 fire retardant coating with added k -CM/APP(3/1) reached 28.5%, UL-94 reached the class V-0, and the fire-resistant temperature of 60 min fire retardant coating was 253 ℃. Compared with pure EP coating, the heat release rate peak of EP2 coating was decreased by 58.26% and the total heat release quantity was decreased by 20.84%, adhesion reached 8.74 MPa.
作者
王娜
杨菲
张静
方庆红
WANG Na;YANG Fei;ZHANG Jing;FANG Qinghong(Sino-Spanish Advanced Materials Institute;Liaoning Provincial Key Laboratory of Rubber & Elastomer, Shenyang University of Chemical Technology, Shenyang 110142, China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2019年第2期385-392,共8页
Chemical Journal of Chinese Universities
基金
辽宁省高端人才计划(批准号:[2016]864)
辽宁省高校创新人才计划(批准号:[2017]053)
沈阳市国际合作项目(批准号:17-51-6-00)
沈阳市中青年科技创新人才计划(批准号:RC170118)
沈阳市科技局中西高等材料研究院项目(批准号:18-005-6-04)资助~~
关键词
卡拉胶微球
聚磷酸铵
水性环氧树脂
阻燃性
Carrageenan microsphere
Ammonium polyphosphate
Waterborne epoxy resin
Flame retardancy
