Coating layer formation from deposited droplets: A comparison of nanofluid, microfluid and solution
Coating layer formation from deposited droplets: A comparison of nanofluid, microfluid and solution
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DOI：
10.1016/j.powtec.2022.117202
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发表时间：
2022-02
影响因子：
5.2
通讯作者：
M. Janocha;E. Tsotsas
中科院分区：
文献类型：
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作者：
M. Janocha;E. Tsotsas
关于建立小涂层的沉积液滴在强制对流下干燥的实验研究。分析了从单液滴残留物到多沉积涂层的结构和形态演变，以及在这种增量层形成过程中孔隙率的发展。三个模型物质进行了比较，分别代表纳米和微悬浮液，以及解决方案的行为。的形态，孔隙率和特性现象的所得层，获得通过固着液滴干燥在平坦的，部分润湿的基板上，也进行了深入的研究。在所有相关的实验系列中，重点放在对干燥条件的依赖性上，以及在连续添加液滴期间的发展。首先通过白光干涉测量法对固体残留物进行了表征，并辅之以X射线显微断层扫描测量。
An experimental investigation regarding the build-up of small coating layers from deposited droplets dried under forced convection is presented. The structural and morphological evolution from single droplet residue to multi-deposit coating layer is analyzed, as well as the development of porosity during this incremental layer formation. Three model substances are compared, representing the behavior of nano- and microsuspensions, as well as solutions, respectively. The morphologies, porosities and characteristic phenomena of the resulting layers, obtained via sessile droplet drying on a flat, partially wetting substrate, are also investigated in-depth. In all associated experimental series, focus is laid on the dependency on drying conditions, as well as the development during the consecutive addition of droplets. Characterization of solid residues was performed foremost by white-light interferometry, with complementary X-ray micro-tomography measurements.