轮胎磨损产生的微塑料和纳米塑料排放机制
Shankar Ghosh1, Anit Sane1, Smita Gohil1
1DCMP&MS, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 400005, Maharashtra, India. sghosh@tifr.res.in.
Soft matter
|March 27, 2025
概括
轮胎磨损会产生明显的微和纳米塑料颗粒. 纳米粒子排放量随速度和重量增加,而较大的微塑料则独立形成,为轮胎碎片化机制提供了洞察力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 毒理学 毒理学 毒理学
背景情况:
- 轮胎和车磨损是纳米颗粒气溶的重要来源,对人类健康和环境构成风险.
- 由于轮胎磨损而造成的颗粒污染物的形成和持久性尚未完全理解.
- 现有的研究缺乏对轮胎碎片化过程的详细机械洞察力.
研究的目的:
- 研究由正常机械轮胎磨损产生的独特的微型和纳米塑料 (MNP) 种群.
- 阐明控制轮胎磨损颗粒尺寸分布和排放特征的物理机制.
- 了解车辆参数如速度和重量对MNP排放的影响.
主要方法:
- 在正常机械应力下分析轮胎磨损的颗粒大小分布.
- 应用已建立的物理模型 (阿查德,格里菲斯,科尔莫戈罗夫) 来描述粒子大小分布.
- 研究影响纳米粒子悬浮 (电荷稳定) 和微塑料沉积 (重力) 的因素.
主要成果:
- 轮胎磨损产生了两个不同的MNP种群:气溶纳米颗粒 (<10微米) 和较大的微塑料.
- 纳米塑料排放遵循功率定律分布,随着车辆的速度和重量而增加.
- 较大的微塑料表现出日志正常分布,由独立于速度和重量的顺序磨损过程形成.
- 电荷稳定使纳米粒子悬浮,而重力导致微塑料沉降.
结论:
- 颗粒大小分布为轮胎碎片化提供了机械的洞察力.
- 喷雾化纳米塑料主要是由轮胎输入功率驱动的.
- 较大的微塑料来自于轮胎与道路的相互作用,无论车辆的速度和重量如何.
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