What is meant by permeation?

What is meant by permeation?

Permeation is the process of molecular penetration of gases, vapours or fluids through the material membrane of a solid. Permeation rates are inversely proportional to the subsurface concentration.

What is permeability Wikipedia?

In electromagnetism, permeability is the measure of magnetization that a material obtains in response to an applied magnetic field. In SI units, permeability is measured in henries per meter (H/m), or equivalently in newtons per ampere squared (N/A2).

What is permeation testing?

Permeation is measured by exposing the outer surface of a sample of fabric to the chemical against which it is being tested. The inner surface of the fabric is monitored analytically to determine the amount of chemical (if any) passing through the fabric.

What is permeation coefficient?

A quantitative measure of the rate at which a molecule can cross a membrane such as a lipid bilayer; expressed in units of cm/s and equal to the diffusion coefficient divided by the width of the membrane.

What are synonyms for permeate?

synonyms for permeate

• imbue.
• impregnate.
• infiltrate.
• infuse.
• invade.
• pass through.
• penetrate.
• percolate.

What are the 3 types of permeability?

There are 3 types of permeability: effective, absolute, and relative permeabilities. Effective permeability is the ability of fluids to pass through pores of rocks or membranes in the presence of other fluids in the medium.

What is permeation in packaging?

Permeation is the movement of a gas or vapor through a semi-permeable barrier such as the wall of a film, whole package, medical device, or even a flexible electronic display. The gas or vapor is driven to move from an area of high concentration to an area of low concentration.

How is permeation rate calculated?

2.05. Flux or permeation rate is the volume of liquid flowing through the membrane per unit area and per unit time and is generally expressed in terms of L m−2 h−1 and the permeability by L m−2 h−1 bar−1.

What is permeation in food packaging?

Permeation: The migration of a gas or vapor through a packaging material (FIGURE 1.)

What is the opposite of permeate?

Opposite of to spread or pervade throughout. dehydrate. dry. take out. close.