摘要
以木质素作为膨胀型阻燃剂的基体,通过接枝氮、磷元素成功合成了碳源、酸源、气源三位一体的木质素基膨胀型阻燃剂Lig-T,实现了良好的阻燃性能。通过红外光谱(FT-IR)分析、元素分析和X射线光电子能谱(XPS)分析证明阻燃剂Lig-T的结构。将木质素基膨胀型阻燃剂按照不同质量分数添加到环氧树脂(EP)中制备Lig-T/EP复合材料,以热重(TG)分析、UL-94垂直燃烧测试、氧指数(LOI)测试和锥形量热(Cone)测试考察复合材料的热稳定性能和阻燃性能。研究结果表明:当木质素基膨胀型阻燃剂Lig-T质量分数为20%时Lig-T/EP复合材料(20%Lig-T/EP)便能达到UL-94的V-0级别,且LOI值高达28.5%,残余物质量分数从14.8%提高到20.2%;随着Lig-T质量分数的增加,复合材料在燃烧过程中热释放总量、烟释放总量均呈现下降的趋势。
Lignin-based intumescent flame retardant(Lig-T)with carbon source,acid source and gas source was synthesized successfully by grafting nitrogen and phosphorus elements.The structure of the flame retardant Lig-T was proved by Fourier transform infrared spectrometer(FT-IR),elements analysis and X-ray photoelectron spectroscopy(XPS).The Lig-T was added to the epoxy resin with different mass fractions to obtain Lig-T/EP composite material.Thermogravimetric analysis,underwriters laboratories 94(UL-94)vertical buring test,oxygen index(LOI)test and cone calorimetry(Cone)test were used to investigate the thermal stability and flame retardancy of composite materials.The results showed that when the mass fraction of the Lig-T was 20%,the composite material 20%Lig-T/EP could reach the UL-94 V-0 level,the oxygen index value was as high as 28.5%,and the mass fraction of the residue increased from 14.8%to 20.2%.With the increase of the mass fraction of Lig-T,the total amount of heat release and the total amount of smoke released during the combustion process of the composite material decreased.
作者
梁孟珂
陈静
戴鹏
马晓峰
张猛
罗振扬
LIANG Mengke;CHEN Jing;DAI Peng;MA Xiaofeng;ZHANG Meng;LUO Zhenyang(College of Science,Nanjing Forestry University,Nanjing 210037,China;Institute of Polymer Materials,Nanjing Forestry University,Nanjing 210037,China;Institute of Chemical Industry of Forest Products,CAF,Nanjing 210042,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2021年第4期10-16,共7页
Chemistry and Industry of Forest Products
基金
国家重点研发计划资助项目(2018YFD0600402)
南京林业大学大学生实践创新训练计划项目(202010298179H)。
