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Porous Materials, Inc > Lexique des termes utilisés
Lexique des termes utilisés
This is a small Glossary used here on our website. This is here to give you a better understanding of different terms used to describe our products and what they do.
- Adsorption
- Un processus qui se produit lorsqu’un soluté liquide ou gazeux s’accumule sur la surface d’un solide ou, plus rarement, d’un liquide (absorbant), formant une couche moléculaire ou atomique (l’absorbat). C’est différent de l’absorption, dans laquelle une substance diffuse dans un liquide ou un solide pour former une solution. Le terme sorption englobe les deux processus, tandis que la désorption est le processus inverse.
- Aire
- Une quantité exprimant la taille en deux dimensions d’une partie définie de surface, typiquement une région définie par une courbe fermée. Le terme aire de surface renvoie à l’aire de surface totale de la surface exposée d’un solide à 3 dimensions, telle que la somme des aires des cotés exposés d’un polyèdre.
- Chimisorption
- a type of adsorption whereby a molecule adheres to a surface through the formation of a chemical bond
- Darcy
- a unit of permeability, named after Henry Darcy. It is not an SI unit, but it is widely used in petroleum engineering and geology. Like other measures of permeability, a darcy has the same units as area.
- Densite
- mass per unit volume
- Diameter
- the width of a circular or cylindrical object
- Gurley (in relation to Porosity)
- a unit describing the number of seconds required for 100 cubic centimeters (1 deciliter) of air to pass through 1.0 square inch of a given material at a given pressure differential.
- Liquid Extrusion
- The forcing of liquid out of a sample
- Liquid Intrusion
- The forcing of liquid into a sample
- Mean
- Occupying a middle or intermediate position between two extremes
- Nonwovens
- Nonwoven textiles are those which are neither woven nor knit, for example felt.
- Permeabilite
- a measure of the ability of a material to transmit fluids; the rate of flow of a liquid or gas through a porous material
- Pore
- a minute opening or orifice, as in the skin or a leaf, for perspiration, absorption, etc.
- Pore Size
- the size of the opening in the sample
- Pore Volume
- the amount of space, measured in cubic units, that an object or substance occupies
- Porosimetry
- an analytical technique used to determine various quantifiable aspects of a material's porous nature, such as pore diameter, total pore volume, surface area, and bulk and absolute densities.
- Porosity
- a measure of the void spaces in a material, and is measured as a fraction, between 0-1, or as a percentage between 0-100%.
- Rayl
- one of two units of acoustic impedance. When sound waves pass through any physical substance the pressure of the waves causes the particles of the substance to move. The sound impedance is the ratio between the sound pressure and the particle velocity it produces. The impedance is one rayl if unit pressure produces unit velocity.
- Aire de surface
- the summation of the areas of the exposed sides of an object
- Viscosity
- the property of a fluid that resists the force tending to cause the fluid to flow; a resistance to flow