摘要
采用以水为溶液的层层自组装法(LBL)在硬质聚氨酯泡沫(RPUF)表面构筑了不同层数的壳聚糖-磺化石墨烯的生物基阻燃涂层,探索了不同层数(x BL)对RPUF阻燃、抑烟性能的影响。结果表明,覆有防火涂层的RPUF表现出优异的阻燃性、热稳定性和抑烟能力,且其性能随着涂覆层数增加而增强;与未处理的样品相比,经过5层自组装涂覆的RPUF-5BL可通过UL 94 V-0级,极限氧指数(LOI,35.1%)和800℃残炭量(34.9%,质量分数,下同)分别提高了78.2%和85.6%;热释放速率峰值(pHRR,163.9 kW/m^(2))、总产烟量(TSP,9.1 m^(2))、最大烟密度(MSD,22.9%)和烟密度等级(SDR,14.9)分别下降了30.6%、14.2%、61.9%和120.1%。
In this paper,a bio⁃based flame⁃retardant coating with different chitosan⁃sulfonated graphene layers was con⁃structed on the surface of a RPUF by using a water⁃based layer⁃by⁃layer self⁃assembly method(LBL).The influence of different layers on the flame retardancy and smoke suppression of the RPUF was intensively investigated.The results in⁃dicated that the RPUF coated with the flame⁃retardant coating exhibited excellent flame⁃retardant performance,high ther⁃mal stability,and good smoke suppression,which were also affecting by the numbers of coating layers.The 5⁃layer⁃self⁃assembly coated RPUF(RPU⁃5BL)reached a UL 94 V⁃0 rating in the vertical burning test along with a limiting oxygen index of 35.1 vol%and a char yield of 34.9 wt%at 800℃,which were increased by 78.2%and 85.6%,respectively,compared to the untreated RPUF.Moreover,the RPU⁃5BL exhibited a peak heat release rate of 163.9 kW/m^(2),a total smoke production of 9.1 m^(2),a maximum smoke density of 22.9%,and a smoke density grade of 14.9,which de⁃creased by 30.6%,14.2%,61.9%,and 120.1%,respectively,compared to the controlled sample.
作者
徐锦佳
黄腾
柏志成
沈佳豪
谢清怡
朱俊辉
戴进峰
刘元强
詹先旭
XU Jinjia;HUANG Teng;BAI Zhicheng;SHEN Jiahao;XIE Qingyi;ZHU Junhui;DAI Jinfeng;LIU Yuanqiang;ZHAN Xianxu(College of Chemistry and Materials Engineering,Zhejiang A&F University,Hangzhou 311300,China;Key Laboratory of Wood Science and Technology of Zhejiang Province,Zhejiang A&F University,Hangzhou 311300,China;Dehua TB New Decoration Material Co,Ltd,Huzhou 313200,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2024年第3期38-43,共6页
China Plastics
基金
国家自然基金项目(51903222)
浙江省自然基金项目(LY21E030001)
浙江农林大学人才引进启动基金资助项目(2017FR017)
浙江农林大学学生创新创业训练计划项目(2023KX029)。
关键词
聚氨酯
泡沫
阻燃
抑烟
磺化石墨烯
层层自组装
polyurethane
foam
flame retardant
smoke suppression
sulfonated graphene
layer⁃by⁃layer self⁃assembly
