Plasma Treatment of Fluoropolymers

RUNCORN, U.K. - Feb. 14, 2023 - PRLog -- Plasma Treatment of Fluoropolymers

Henniker Plasma, a leading manufacturer of plasma surface treatment equipment, presents Plasma Treatment of Fluoropolymers

PTFE, and other fluorinated polymers, are chemically inert, thermally stable and highly hydrophobic, due to their intrinsically low surface energy. The chemical inertness of PTFE as an example, means that it is virtually impossible to form lasting adhesive bonds and coatings tend instead to form droplets and 3D particles on the surface rather than a uniform film. Traditional methods to increase the surface energy involve the use of aggressive primers which represent an ecological hazard.

Fluorinated polymers are not readily modified by standard plasma processes. Oxygen plasmas, which are successfully used to treat many hydrocarbon-based polymers, are not successful because the binding energy of the fluorine to carbon atom is far higher than that of oxygen to carbon. Plasma treatment of fluorinated polymers with oxygen plasmas instead causes a gradual etching of the surface, as opposed to surface activation.

The use of hydrogen plasma on the other hand, produces an immediate and lasting change in the nature of the fluoropolymer surface. The action of atomic hydrogen, generated by the plasma, is to react with surface fluorine and remove this into the gas phase where it is pumped away by the vacuum system. Hydrogen then terminates the free surface bonds to produce a CHx polymer surface which is readily wettable. The resulting surface is also mildly-etched on a microscopic scale which produces a microscopically structured surface. Both actions in combination result in a modified surface which may be glued, painted etc.

"Treatment of PTFE with low pressure hydrogen plasma is a very effective method of rendering the surface wettable without using harsh chemicals." - Henniker Plasma

Read the full press release here - https://plasmatreatment.co.uk/knowledge-base/press-releas...

To learn more about plasma treatment technology contact Henniker Plasma or visit www.plasmatreatment.co.uk