在蒸发的状滴滴中使用CO2驱动的扩散泳
Saebom Lee1,2, Yong Lin Kong2, Gyoujin Cho3,4,5
1School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea.
概括
二氧化碳 (CO2) 驱动的扩散泳提供了一种新的方法来控制蒸发滴中的粒子运动,克服了先进印刷应用中传统咖啡环效应的局限性.
科学领域:
- 流体动力学 流体动力学
- 体科学是一门关于体的科学.
- 材料科学是一种材料科学.
背景情况:
- 控制蒸发滴中的颗粒传输对于印刷中的薄膜沉积至关重要.
- 由蒸发引起的毛细血管流导致咖啡环效应,将颗粒集中在滴滴边缘.
- 马兰戈尼流是由温度或表面张力梯度驱动的,可以改变粒子组合.
研究的目的:
- 研究二氧化碳驱动的扩散泳作为一种控制蒸发滴中的颗粒运输的方法.
- 为了将扩散论与不同大气环境 (空气与CO2) 中的毛细血管和马兰戈尼流量进行比较.
- 了解与内部滴滴流动相互作用的扩散泳的基本物理.
主要方法:
- 利用计算模拟来建模内部流动和粒子运输.
- 进行了实验,以验证扩散泳术对滴滴沉积模式的影响.
- 在空气和二氧化碳大气下滴的粒子行为比较,有和没有温度梯度.
主要成果:
- 二氧化碳驱动的扩散泳可以覆盖毛细血管流,根据表面电荷指导粒子迁移.
- 由于快速的离子和,马兰戈尼流可以在温度梯度下主导扩散泳.
- 扩散泳有效调节最终颗粒沉积模式,提供对组装的控制.
结论:
- 以二氧化碳驱动的扩散泳提供了一个可行的,更简单的替代方案,用于控制蒸发滴中的颗粒沉积.
- 这种方法允许精确操纵颗粒运输,最小的溶液污染.
- 这项研究增强了对蒸发系统中扩散泳-马拉贡尼-毛细血管流动相互作用的理解.
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