Dynamic wetting of soluble polymer surfaces
可溶聚合物表面的动态润湿
基本信息
- 批准号:246477399
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2014
- 资助国家:德国
- 起止时间:2013-12-31 至 2017-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Understanding the wetting process, and thus the contact line dynamics, of solvents spontaneously spreading on polymer surfaces is essential in various technical applications, from printing to painting, to coating, to food science or to aerosol drug delivery. The dependence of the wetting speed on the surface energy or wettability of the surface is described by a power law in the case of simple liquids and surfaces. What is not yet understood is if this holds also for more complex systems, e.g. liquids or solvents in contact with polymer surfaces. Furthermore, if the liquid spreading on the polymer surface is a solvent for the polymer, it will diffuse into the polymer causing swelling, and on larger time scales it will eventually dissolve the polymer.The goal of the present project is to shed light on the complex interplay between the processes of wetting, swelling, solvation, and evaporation occurring at a polymer surface when a drop of solvent spreads over it.Well-defined polymer/solvent systems will be characterized experimentally and by molecular dynamics simulations: toluene drops on surfaces of polystyrene with different molecular weight and surface microstructure. High speed camera measurements of the spreading process and of the imprints left from the solvent after evaporation will be compared to atomistic and coarse-grained simulations.
了解润湿过程,以及溶剂在聚合物表面自发扩散的接触线动力学,在各种技术应用中是必不可少的,从印刷到绘画,到涂层,到食品科学或气溶胶药物输送。在简单液体和表面的情况下,润湿速度对表面能或表面润湿性的依赖由幂律描述。目前尚不清楚的是,这是否也适用于更复杂的系统,例如与聚合物表面接触的液体或溶剂。此外,如果扩散在聚合物表面的液体是聚合物的溶剂,它会扩散到聚合物中引起膨胀,在更大的时间尺度上它最终会溶解聚合物。本项目的目标是阐明当一滴溶剂在聚合物表面扩散时,在聚合物表面发生的润湿、膨胀、溶剂化和蒸发过程之间的复杂相互作用。定义良好的聚合物/溶剂体系将通过实验和分子动力学模拟来表征:甲苯滴在具有不同分子量和表面微观结构的聚苯乙烯表面上。高速相机测量的扩散过程和印迹留下的溶剂蒸发后,将比较原子和粗粒度模拟。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Vortex formation in coalescence of droplets with a reservoir using molecular dynamics simulations.
- DOI:10.1016/j.jcis.2016.06.059
- 发表时间:2016-10
- 期刊:
- 影响因子:9.9
- 作者:Fereshte Taherian;V. Marcon;E. Bonaccurso;N. V. D. van der Vegt
- 通讯作者:Fereshte Taherian;V. Marcon;E. Bonaccurso;N. V. D. van der Vegt
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Professorin Dr. Tatiana Gambaryan-Roisman, since 2/2014其他文献
Professorin Dr. Tatiana Gambaryan-Roisman, since 2/2014的其他文献
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