Liquid spreading on solid surfaces and penetration into porous matrices: Coated and uncoated papers

Researching the interaction of different printed materials types with liquids

“…So, onto the imprint's quality major influence is done by printed surface type and wetting of its surface. Especially the process of creation of the ink film onto the porous surface is connected with the physical phenomena of the dyeing substance diffusion into the printed material structure, and it requires rather good wetting, which is necessary to get the non-defect ink film in the end [5].…”

Noninvasive porosity measurement of biconvex tablets using terahertz pulses

“…When it comes to the prediction of liquid penetration into a porous structure (Jiang et al, 2011;Ridgway and Gane, 2002;Roberts et al, 1997), estimation of the connectivity of air pores and pore size of the structure have significant role to play. Different physicochemical phenomena such as van der Waals forces, surface wetting and capillary flow of liquid (Rosenholm, 2015;Rosenholm et al, 2008) have importance in the theoretical prediction of liquid penetration into a porous medium. Whatever the situation, it is clear that the presence of a closed pore can be a problem regarding measurements such as porosity detection with a mercury porosimeter.…”

Characterizing the fluid–matrix affinity in an organogel from the growth dynamics of oil stains on blotting paper

“…12 A review of liquid spreading on substrates and in porous materials can be found in the literature. 13 In this work, we develop a quantitative scheme to depict the transfer of oil from the grease into porous paper and to extract an affinity parameter that describes the retention strength of the grease matrix. To this end, we monitor optically the growth of an oil stain after depositing a fixed amount of grease onto the paper in the course of a few hours.…”