Shi Congling, Wan Mei, Qian Xiaodong, Jing Jingyun, Zhou Keqing
Beijing Key Laboratory of Metro Fire and Passenger Transportation Safety, China Academy of Safety Science and Technology, Beijing 100012, China.
Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China.
Molecules. 2023 Sep 27;28(19):6820. doi: 10.3390/molecules28196820.
Novel hybrid flame retardants containing zinc hydroxystannate and carbon nanotubes (ZHS-CNTs) were synthesized using the coprecipitation method, and the structure and morphology of ZHS-CNTs were investigate using an X-ray powder diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and thermogravimetric analyzer (TGA). Then, the ZHS, CNTs and ZHS-CNTs were incorporated into EP, respectively, and the flame-retardant and smoke inhibition performance of the composites were compared and studied. Among the three composites, the EP/ZHS-CNT composites have the highest improvements on the fire resistance and smoke inhibition properties. With only 2.0 wt.% ZHS-CNT hybrids, the pHRR of EP/ZHS-CNT composite materials is reduced by 34.2% compared with EP. Moreover, the release of toxic gases including CO, CO and SPR from the composites was also effectively inhibited. The mechanisms of flame retardant and smoke inhibition were investigated and the improved properties were generally ascribed to the synergistic flame-retardant effects between ZHS and CNTs, the catalyzing effect of ZHS and the stable network structure of CNTs.
采用共沉淀法合成了含羟基锡酸锌和碳纳米管的新型杂化阻燃剂（ZHS-CNTs），并利用X射线粉末衍射仪（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和热重分析仪（TGA）对ZHS-CNTs的结构和形貌进行了研究。然后，将ZHS、碳纳米管和ZHS-CNTs分别加入到环氧树脂中，对复合材料的阻燃和抑烟性能进行了比较和研究。在这三种复合材料中，EP/ZHS-CNT复合材料在耐火性和抑烟性能方面有最高的提升。仅含2.0 wt.%的ZHS-CNT杂化材料时，EP/ZHS-CNT复合材料的热释放峰值（pHRR）相比纯环氧树脂降低了34.2%。此外，复合材料中包括CO、CO和SPR等有毒气体的释放也得到了有效抑制。对其阻燃和抑烟机理进行了研究，性能的改善通常归因于ZHS和碳纳米管之间的协同阻燃效应、ZHS的催化作用以及碳纳米管的稳定网络结构。
