caa a22 4500 606195270 CHVBK 20210128100918.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10934-015-9948-2 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9948-2 Liquid flow in polyurethane foams for filtration applications: a study on their characterization and permeability estimation [Elektronische Daten] [Subhashini Gunashekar, Krishna Pillai, Benjamin Church, Nidal Abu-Zahra] Open-cell polyurethane foams have been investigated for various filtration applications to treat industrial byproducts and waste water. Flow-related morphological characterization of three types of polyurethane foams: (1) control, unmodified polyurethane foam, (2) flexible polyurethane foam obtained by chain extension, and (3) rigid polyurethane foam obtained by chain extension, is presented in this study. Analysis of micrographs, using histograms based on pore size, revealed that the pore size varied in the foams based on their composition. The permeability (K) of the foams for liquid flow, measured by a falling-head permeameter was in the range of 0.45×10−11-2.62×10−11m2. In comparison to the theoretical permeability models, the experimental values were smaller by two orders of magnitude. The theoretical prediction of the permeability improved after considering effective porosity and replicated the trend seen in the experiments, but the large gap between the prediction and experiments remained. The failure of the theoretical models points to the need for developing more accurate permeability models after including 3-D pore interconnections and swelling of solid matrix. Springer Science+Business Media New York, 2015 Open-cell polyurethane foam nationallicence Permeability nationallicence Porosity nationallicence Porous medium nationallicence Darcy's law nationallicence Gunashekar Subhashini Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut Pillai Krishna Mechanical Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut Church Benjamin Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut Abu-Zahra Nidal Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 749-759 1380-2224 22:3<749 2015 22 10934 https://doi.org/10.1007/s10934-015-9948-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9948-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gunashekar Subhashini Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Pillai Krishna Mechanical Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Church Benjamin Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut NATIONALLICENCE 700 1- Abu-Zahra Nidal Materials Science and Engineering Department, University of Wisconsin - Milwaukee, 3200 N Cramer St, 53211, Milwaukee, WI, USA aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 749-759 1380-2224 22:3<749 2015 22 10934