表面涂层的ZnO粉末作为木材的阻燃剂:简短的沟通
Olina Öhrn1, Kesavarao Sykam2, Sidique Gawusu3
1Structural and Fire Engineering Division, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå 97187, Sweden.
The Science of the total environment
|July 5, 2023
概括
将氧化 (ZnO) 粉末涂层添加到木材中,会显著延迟接触热量的点火时间. 这种消防安全增强在各种热度水平上是有效的,为木结构提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 消防安全工程 消防安全工程
- 木材保护 保护木材保护
背景情况:
- 木材是一种常见的易燃的建筑材料.
- 提高木材的耐火性对于安全至关重要,尤其是在野地与城市的界面上.
- 目前的阻燃剂方法需要加强,以提高有效性和易于应用.
研究的目的:
- 评估氧化 (ZnO) 涂层在提高木材的消防安全方面的有效性.
- 量化ZnO对在辐射热流下木材点火时间 (TTI) 的影响.
- 为了评估ZnO涂层在燃烧后的耐用性.
主要方法:
- 木材样本被涂上两种不同度的ZnO (0.5和1g/dm2).
- 涂层和未涂层 (对照) 木材样本使用形热量计在20,35和50kWm-2.2时受到辐射热量流.
- 在所有样本中测量了点火时间 (TTI).
- 分析了燃烧前后ZnO颗粒的微图.
主要成果:
- ZnO涂层显著增加了木材的点火时间 (TTI).
- 0.5g/dm2的ZnO涂层增加了TTI的26-33%,而1g/dm2的涂层增加了TTI的37-40%.
- 观察到的TTI增加在所有测试的辐射水平中都是一致的,在燃烧后,ZnO粒子形态保持不变.
结论:
- 氧化 (ZnO) 粉末涂层提供了一种简单有效的方法,通过延迟点火来提高木材的消防安全.
- 增加的TTI表明火焰传播潜力降低,为保护木结构提供了可行的解决方案.
- ZnO涂层表现出耐用性和一致的性能,使其成为木材的有希望的阻燃处理.
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