Plasma Coatings

In plasma coatings a nano-scale polymer layer is formed over the entire surface area of an object placed in the plasma. The plasma coating process takes just a few minutes. The coating produced is typically less than 1/100th thickness of a human hair, colourless, odourless and doesn’t effect the look or feel of the material in any way. It is a permanent coating too, being bound to the material surface on an atomic scale.

Plasma coatings are one of the most exciting areas of plasma technology, offering enormous potential to enhance a material’s function and value over a wide range of applications. They deliver two main categories of surface property: totally liquid (water & oil) repellent, or totally wettable.

How Plasma Coatings Work

Monomers are introduced with the plasma feed gas. Monomers are small molecules which will, under the correct conditions, bond together to form polymers. Plasmas create the right conditions at the surface of the material for this to happen both quickly and efficiently. Different monomers are used to produce hydrophobic and hydrophilic surfaces.

A scientific illustration of a part prior to plasma coating treatmentA scientific illustration of a part during plasma coating polymerisationA scientific illustration of a part having been plasma coated with its newly deposited molecular layer

 

Plasma coating is suitable for e.g.:

  • general plastics and rubber
  • performance textiles
  • filtration media
  • metals, glass, ceramics and composites
  • medical plastics
  • consumer electronics plastics
  • automotive components
  • aerospace components

 

 


Liquid Repellent Plasma Coatings

A tissue with a small droplet of water on the surface to show the samples inherent absorbic properties A tissue with a small droplet of water on the surface post plasma treatment to display its newly applied water repellent properties

 

Specific treatments render surfaces totally repellent to water, solvents and oils.

 


Hydrophilic Plasma Coatings

A metal part with a water droplet on the surface displaying the samples inherent hydrophobic properties A metal part with a water droplet on the surface displaying the samples new hydrophilic properties after being plasma treated

Hydrophilic plasma treatments render surfaces permanently wettable.

 


 

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