Elastocapillary Dynamics During Wetting and Drying of Sheets and Fibers

片材和纤维润湿和干燥过程中的弹性毛细管动力学

• 批准号: 1132835
• 负责人: Howard Stone
• 金额: $ 27.75万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-15 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1132835&HistoricalAwards=false
• 关键词: Elastocapillary; Dynamics; During; Wetting; Drying

1132835StoneSurface tension plays a role in many industrial problems and natural phenomena; many of these involve significant elastic effects of the basic materials such as the surrounding substrates and/or porous matrices, e.g. textiles, hair, and filters are just some of the soft materials that readily change shape (and possibly function) when wet or dried. Although static problems involving the interplay between surface tension (capillarity), elasticity, and possibly other forces are well studied, there are very few studies of the dynamics of elastocapillarity, which is the subject of this proposal. Because of the breadth of applications that involve elastocapillary dynamics, spanning material science, and the biological and environmental sciences, we believe that this research area will yield new insights and applications. The research in this proposal is focused on characterizing, both experimentally and theoretically, two common geometries - sheets and fibers - and two common dynamical situations - spontaneous wetting and drying. In addition, we will study the dynamics of wetting and drying of a model soft porous material consisting of a fibrous matrix. In this way, we will provide a systematic, yet broad characterization of the dynamics of elastocapillary flow problems. The research described in this proposal may yield new insights such as whether there is an optimum drop size for wetting a fibrous medium and how the drying rate of a fibrous medium is influenced by the softness (elasticity) of the fibers.Broader impacts: In addition to publishing our findings in journals that span engineering, physics, and materials science, the PI will continue his multi-faceted outreach activities, including hosting visitors from different disciplines and educational institutions, engaging undergraduate students in research and giving talks at conferences, leading professional development activities for undergraduate, graduate, and postdoctoral colleagues, and participating in mentoring programs for young researchers from under-represented groups. Also, the PI has successfully incorporated research themes into "holiday" lectures for children and parents that he has given over the past 9 years and which he will continue to develop and present. Overall, the research will have a direct impact on our understanding of wetting and drying of common soft fibrous materials, which arises in a wide variety of industrial and natural systems.

1132835 Stonesurface张力在许多工业问题和自然现象中起作用；其中许多涉及基本材料的显着弹性效应，例如周围的底物和/或多孔矩阵，例如纺织品，头发和过滤器只是一些柔软的材料，这些材料在湿或干时很容易改变形状（可能起作用）。 尽管涉及表面张力（毛细血管），弹性以及可能的其他力之间相互作用的静态问题经过了充分的研究，但很少有关于弹性毛细血管动力学的研究，这是该提议的主题。由于涉及弹性动力学，涵盖材料科学以及生物学和环境科学的应用的广度，我们认为该研究领域将产生新的见解和应用。该提案中的研究重点是在实验和理论上表征两个常见的几何形状 - 板和纤维 - 以及两种常见的动态情况 - 自发润湿和干燥。此外，我们将研究由纤维基质组成的模型软多孔材料的润湿和干燥动力学。通过这种方式，我们将为弹性流动问题的动力学提供系统的，但广泛的表征。该提案中描述的研究可能会产生新的见解，例如是否有最佳的滴注纤维培养基的最佳跌幅，以及纤维培养基的干燥速率如何受到纤维的柔软度（弹性）的影响。BROADER的影响：除了将我们的发现在跨越工程，材料和材料科学范围内的期刊中发表我们的发现外，还将启用我们的发现。教育机构，吸引本科生从事研究并在会议上进行演讲，领导本科，研究生和博士后同事的专业发展活动，并为来自代表性不足的团体的年轻研究人员提供指导计划。此外，PI已成功地将研究主题纳入了他在过去9年中为儿童和父母提供的“假期”讲座，并将继续发展和展示。总体而言，这项研究将直接影响我们对常见柔软纤维材料的润湿和干燥的理解，这在各种工业和自然系统中都会产生。