Layer buildup and structure from drying deposited droplets

这个项目的目标是以实验的方式复制一滴一滴的方式，如何从含有固体物质的干燥液滴中依次构建层。等高线和孔隙度将在层积过程中通过白光干涉测量法逐步测量。我们将通过微移液器技术，达到可以产生并轻轻沉积的最小液滴尺寸。调查将包括非常不同的流体（盐溶液、纳米悬浮液、微悬浮液），用于干燥条件和技术处理条件。通过这种方式，人们有望对同时喷涂和干燥产生的多孔层结构的演变产生新的见解，并间接地了解依赖于涂层结构的许多最终用途特性。影响结构形成及其相互作用的机制将被识别和分析，目标是至少部分有效的制度图和第一相关性。最后，在相同干燥条件下设计的实验将能够将非原位层形成测量与喷雾流化床中的涂层进行比较。

Goal of this project is to experimentally replicate in a droplet-by-droplet manner how layers are successively built from drying droplets that contain solid material. Contour and porosity will be measured incrementally during layer buildup by means of white light interferometry. We will go to the smallest droplet size that can be produced and gently deposited by micropipette technology. The investigation will embrace very different fluids (salt solutions, nanosuspensions, microsuspensions) for drying conditions up to technical processing conditions. In this way new insights are expected about the evolution of the structure of porous layers produced by simultaneous spraying and drying, and indirectly also about many end-use properties that depend on coating structure. Mechanisms with an influence on structure formation and their interactions will be identified and analyzed, aiming at regime maps and first correlations of at least partial validity. Finally, experiments designed for same drying conditions will enable a comparison of the ex-situ layer formation measurements with coating in spray fluidized beds.