How Does Diffusion Permeability Differ from Capillary Flow Porometry?

 

Diffusion permeability and Capillary Flow Porometer Testing Services are two different things. Before you start differentiating both of these services, why not we go a little deeper and learn the basics first?

It is important to note that the difference between the two lies between the basics. Therefore, discussing the definitions, application, and usage will help get through the point without missing out on any major detail!

You can also check our guide: 4 Benefits of Using Capillary Flow Porometry Testing Services

What is Diffusion Permeability?

Diffusion is the random movement of molecules driven from high concentration to low concentration. However, Diffusion permeability describes the diffusion of particles through membranes. Only ions and molecules with semipermeable membranes can diffuse against such high concentrations. 

Diffusion permeability can occur through many materials such as ceramics, polymers, and metals. It’s important to note that the permeability of metals is much lower than that of a polymer and ceramic due to their porosity and crystal structure. 

Diffusion permeability must be considered carefully in polymer applications because of the high permeability present in them. This type of permeability depends on the temperature and the characteristics of the interaction of the permeant component and the polymer.

The permeation of a material can be measured through several methods that quantify the permeability of a substance through a material.

Now that you know about diffusion permeability, we can move forward and tell you a little about Capillary Flow Porometer Testing Services. Then you can differentiate between the two!

Capillary Flow Porometer Testing Services

Capillary flow porometry is a technique used to evaluate the permeability characteristics and the pore size distribution of different materials. These materials may include paper, cotton, synthetic polymers, foams, ceramics, hollow fibers, and many more.

but wait…

do you know how a capillary flow porometer works? 

The capillary flow porometer is an advanced version of the flow porometer series. It creates accurate results by using reproducible data. These porometers complete the given test in a small amount of time and require minimal operator involvement. 

All these conveniences make the capillary porometer a much desirable option for operational efficiency and industrial use. The porometer is specifically designed for a linear turbulence-free flow of test gases as the pressure is measured close to the sample. 

The capillary porometer comes in 6 different models with varying pore size ranges and flow rates to meet your specific needs!

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In even simpler words, a flow porometer is used to determine the variables that can help you understand how solids, liquids, and gasses combine to create pores. Later, the generated data is used to interpret for analytical purposes. 

Quick Recap: The Major Differences:

Diffusion Permeability	Capillary Flow Porometry
ü  It is the diffusion of particles through membranes	ü  This technique is used to evaluate the permeability characteristics and the pore size distribution of different materials
ü  Diffusion permeability can occur through many materials such as ceramics, polymers, and metals	ü  Capillary flow porometer includes paper, cotton, synthetic polymers, foams, ceramics, hollow fibers, and many more.
ü  Several Methods involved during the process of diffusion permeability	ü  Three methods involved (Pressure scan, Pressure step/stability, & Measured First Bubble Point) for this testing service
ü  Diffusion permeability can be done without adding any liquids	ü  Capillary flow requires a wetting liquid to work with.

Wrapping Up!

Adding a little extra information here, a capillary flow porometer is a technique used to evaluate the pore size. However, diffusion permeability diffuses molecules flow from high concentration to low concentration. The difference is quite clear now!