防水颗粒涂层用于增强滴滴沉积
Rutvik Lathia1, Premkumar Iyer1, Chandantaru Dey Modak1
1Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, India, 560012.
Journal of colloid and interface science
|October 7, 2025
概括
液体大理石 (LM) 在疏水表面显著增加滴滴沉积,达到95%以上的效率. 这种无表面活性剂的方法提高了能量消耗,防止了农药输送和涂料等应用中的损失.
科学领域:
- 表面科学与工程 表面科学与工程
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 滴滴沉积在疏水表面是低效的由于低表面能量,造成损失在关键的应用程序.
- 传统方法使用表面活性剂和聚合物,造成环境和健康问题.
研究的目的:
- 调查是否用疏水性颗粒 (液体大理石,LM) 涂覆滴滴可以提高非湿表面的沉积效率.
- 探索LM作为一种可持续的,无表面活性剂和无聚合物替代品,以改善滴滴传递.
主要方法:
- 研究了液体大理石在不同湿度 (高达140°接触角度) 的表面上的冲击动态.
- 利用高速成像进行沉积分析和理论建模能量消耗.
- 评估了颗粒载荷,基板灵活性和生物相容颗粒 (Lycopodium, Zein) 的影响.
主要成果:
- 液体大理石实现了超过95%的沉积效率,相比之下,裸滴的沉积效率低于5%.
- 增强的沉积与通过在反弹过程中通过粒子阻塞增加的能量消耗 (高达50%以上) 有关.
- 通过防止过度的滴滴拉伸,LM抑制了部分沉积,在刚性和灵活的表面上有效.
结论:
- 液体大理石提供了一种高效,无表面活性剂和无聚合物方法,用于在疏水表面的滴滴沉积.
- 像Lycopodium和Zeen这样的生物相容颗粒提供了环保增强,扩大了应用潜力.
- 这种方法对农药输送,喷雾冷却和先进涂料有希望.
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