溶剂蒸发的数值模拟在一个反应性银墨水滴沉积在加热基板上的反应性银墨水滴
Weipeng Zhang1, Jun Yang1,2, George K Knopf1
1Mechanical and Materials Engineering, The University of Western Ontario, N6A 5B9 London, Ontario, Canada.
ACS omega
|October 30, 2023
概括
这项研究以数值方式研究了在蒸发反应性银墨中的银离子运动. 毛细管流驱动银颗粒聚合,影响导电膜的喷墨打印质量.
科学领域:
- 材料科学 材料科学 材料科学
- 流体动力学 流体动力学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 优化电子喷墨印刷需要了解在活性银墨溶剂中的银离子 (Ag+) 运动.
- 在热蒸发过程中颗粒聚合会影响印制的银膜和微痕的质量.
研究的目的:
- 为了数值地研究蒸发的活性银墨水滴中的微流.
- 在热激活过程中预测银颗粒聚合物的形态.
- 为改善喷墨印刷提供对银颗粒聚合机制的见解.
主要方法:
- 使用纳维埃-斯托克斯方程进行数值模拟.
- 使用COMSOL Multiphysics对水-乙烯基醇溶剂的滴滴蒸发进行建模.
- 分析由于质量转移和毛细血管流量的流体异质性.
主要成果:
- 乙烯基醇集中在加热的流体-基板接口上,并通过毛细血管作用向内转移.
- 由于热驱动的反应,银颗粒在滴滴的底部中心积聚.
- 毛细管流占主导地位,导致"咖啡环效应",在接触线上积聚颗粒.
结论:
- 滴水蒸发受水度,基板温度,表面张力和自然对流的影响.
- 毛细管流是银颗粒聚合的主要驱动因素.
- 这些发现为增强喷墨打印导电银膜和微痕迹提供了现实的参数.
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