Characterization by mercury porosimetry of nonwoven fiber media with deformation
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JEFF-D-09-00010_rev.pdf
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1.97 MB
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Author(s)
Lowery, Joseph L.
Pai, Chia-Ling
Rutledge, Gregory C
Date Issued
April 2009
Journal
Journal of Engineered Fibers and Fabrics
Publisher
Association of the Nonwoven Fabrics Industry
Citation
Rutledge, Gregory C., Lowery, Joseph L. and Chia-Ling Pai. "Characterization by mercury porosimetry of nonwoven fiber media with deformation." Journal of Engineered Fibers and Fabrics (2009) 4.3, p.1-13.
Version
Author's final manuscript
Abstract
The porosity and pore diameter distribution are important characteristics of nonwoven fiber media. With the advent of electrospinning, the production of mats of nonwoven fibrous materials with fiber diameters in the 0.1-10 mu m range has become more prevalent. The large compliance of these mats makes them susceptible to mechanical deformation under the pressures attained in a typical mercury porosimetry experiment. We report a theoretical analysis of the liquid volume measured during liquid intrusion porosimetry in the presence of deformation of such mats by one of two modes: buckling of the pores or elastic compression of the mat. For electrospun mats of poly(epsilon-caprolactone) with average fiber diameters ranging from 2.49 to 18.0 mu m, we find that buckling is the more relevant mode of deformation, and that it can alter significantly the determination of pore diameter distributions measured by mercury porosimetry.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
http://www.jeffjournal.org/papers/Volume4/4.3Rutledge1-13.pdf
