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以酸化的碳纳米管为原料,通过原位聚合在其表面接枝PA66得到PA66功能化碳纳米管(NF-CNTs),然后用溶液共混法将NF-CNTs与PA66混合制备了PA66/NF-CNTs复合材料,对比了碳纳米管功能化前后对于复合材料性能的影响.结果表明:NF-CNTs在复合材料中分散性更好;与PA66/CNTs复合材料相比,PA66/NFCNTs复合材料的体积电阻率更低,渗滤阈值从4%下降为3%;当NF-CNTs的添加量为2%时,PA66/NF-CNTs复合材料的初始失重温度达到最大值390℃,与纯PA66以及PA66/CNTs复合材料相比,分别提升了38℃和13℃.
The PA66 functionalized carbon nanotubes (NF-CNTs) were obtained by grafting PA66 on the surface of PA66 by in-situ polymerization using acidified carbon nanotubes as raw materials. Then PA66 / NF -CNTs composites, the effect of CNTs on the properties of composites was compared before and after functionalization of CNTs.The results showed that the dispersibility of NF-CNTs in composites was better than that of PA66 / CNTs composites The volume resistivity is lower and the percolation threshold is reduced from 4% to 3%. When the amount of NF-CNTs is 2%, the initial weight loss temperature of PA66 / NF-CNTs composites reaches 390 ℃, PA66 / CNTs composites, respectively, increased by 38 ℃ and 13 ℃.