An Extended Range Liquid Extrusion Method for Determining Pore Size Distributions

Abstract

A liquid extrusion method for determining pore volume distributions has been developed that is especially useful for, but not restricted to, characterizing fibrous materials. It involves gravimetric monitoring of liquid that drains from an initially saturated sample as incremental increases in pressure gradient are applied across it. Any liquid that wets the material can be used. Using techniques devised for applying an extended range of pressure gradients, it is possible to detect pore radii from 0.5 to 1,000 μm. Results for a variety of substrates show the sensitivity of the method. For example, bimodal distributions obtained for woven fabrics reflect the larger interyarn and smaller intrayarn pores. Advantages and limitations of the method and the meaning and usefulness of the data are discussed.

Physiological comfort of fabrics and garments

“…A number of researchers [108][109][110][111] have studied both theoretically and experimentally the liquid wetting and transport in capillaries and fi brous materials. It has been shown that smaller pore sizes produce higher capillary pressure and thus enhance the liquid spreading.…”

The capture of fly ash particles using circular and noncircular cross‐section fabric filters

“…One of the most important features of these fabric filters is their porosity, which was measured by Hg-Porosimetry [22]. According to Lamb [10], a trilobal shape of the fibers promotes fiber separation and, thus, a higher porosity of the fabric.…”

Characterization of voids formed during liquid impregnation of non-woven multifilament glass networks as related to composite processing

“…Pore structure of the mats was characterized by the liquid extrusion method on the TRI Pore Volume Distribution apparatus [11].…”