纳米锌/对氨基苯磺酸/环氧丙烯酸酯涂层的阻燃性能研究

Study on flame retardant property of nano Zn/p-aminobenzenesulfonic acid/epoxy acrylate coatings

为探讨纳米锌与对氨基苯磺酸对环氧丙烯酸酯(EA)涂层的阻燃效果,以乙酸锌和苜蓿粉为原料,利用植物还原法制备了纳米锌,将其与对氨基苯磺酸及EA配合,经紫外光固化制备纳米锌/对氨基苯磺酸/EA阻燃涂层。通过透射电镜、X-射线衍射仪、红外、紫外、差示扫描量热仪及力学分析仪对其纳米锌及上述阻燃涂层的结构、阻燃、透光率、热稳定性及硬度等性能进行测定。结果表明:合成的纳米锌的径粒为3. 8±0. 8 nm,其特征衍射峰与单质锌晶体的相吻合;当纳米锌添加量为1. 0 g时,纳米锌/对氨基苯磺酸/EA涂层阻燃性能最佳,涂层残炭率达19. 47%,极限氧指数达31。所有涂层硬度均大于5 H,涂层热稳定性随纳米锌添加量的增加而增加。涂层热降解分析表明纳米锌和对氨基苯磺酸能有效提高涂层阻燃和热稳定性。本实验为阻燃EA涂层提供了一种有效的阻燃改性方法。

To study the flame retardant effect of nano-zinc and p-aminobenzenesulfonic acid on epoxy acrylate（EA）coatings,nano-zinc was prepared by plant reduction method and zinc acetate and alfalfa powder as raw materials.Nano Zinc/Sodium Sulfide/EA flame retardant coating was prepared by mixing nano-zinc,Sodium Sulfide into EA and UV-curing method.The structure of nano zinc and some properties such as flame retardancy,light transmittance,thermal stability and hardness of the coating were measured by transmission electron microscopy（TEM）,X-ray diffraction（XRD）,Fourier infrared spectrometer,ultraviolet visible spectrophotometer,differential scanning calorimetry and mechanical analyzer.The results showed that the diameter of the synthesized nano zinc was 3.8 ±0.8 nm,and its characteristic diffraction peak was consistent with that of the nano-zinc was 1.0 g,and its residual carbon yield and limit oxygen index reached 19.47%and 31 respectively.And the hardness of all flame retardant coatings was more than 5 H.The thermal stability of the coatings increased with the increase of nano zinc content.Thermal degradation analysis showed that nano-zinc and p-aminobenzenesulfonic acid could effectively improve the flame retardancy and thermal stability of the coating.In the experiment an effective method for flame retardant modification of EA coating was provided.