最近通过纳米粒子对阻燃性进行补救的补救策略
1School of Safety Science and Engineering, Xi'an University of Science and Technology, No. 58 Yanta Road, Xi'an, China.
Chemosphere
|February 4, 2024
概括
纳米粒子通过降低氧气和燃烧速度,在防火方面显示出巨大的前景. 特定的纳米颗粒如SiO2,MgAl和纳米酸盐在减肥,减少烟雾和控制热释放速度方面提供了显著的好处.
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
- 纳米技术 纳米技术
背景情况:
- 已建立的防火方法包括安全原则,灭火系统,报警器,阻燃化学品和安全设备.
- 纳米粒子 (NP) 具有独特的特性,可以增强防火策略.
- 火灾传播对建筑结构和车辆构成重大风险.
研究的目的:
- 审查和阐明纳米颗粒 (NP) 在防火方面的具体贡献.
- 与传统的防火方法相比,专注于NP的独特特性.
- 评估NP对降低氧气水平,燃烧速度,重量和烟雾的影响.
主要方法:
- 审查现有关于纳米粒子在防火中的应用研究.
- 对限制氧指数 (LOI) 的纳米粒子影响的分析,以评估氧减少.
- 使用塑料材料的点火时间,热释放率 (HRR) 和可燃性测试 (UL-94) 评估燃烧减少率.
主要成果:
- 纳米粒子在控制和减轻结构和车辆中火灾传播方面显示出潜力.
- 特定的NP如SiO2,MgAl和纳米酸在分别减轻重量,减少烟雾和HRR方面表现出色.
- 在研究的纳米粒子中,Al2O3被确定为最不有效的处理纳米粒子之一.
结论:
- 纳米粒子在防火技术中提供了显著的进步.
- 通过降低氧气水平和热释放等关键火灾指标,NP有助于提高安全性.
- 调查结果支持将NP整合起来,以加强安全措施并减少各行各业的火灾风险.
相关概念视频
01:02Flame Photometry: Overview
596
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
596
01:16Flame Photometry: Lab
247
In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
247