Gas phase fluorination is an innovative and practically applicable process for durable modification of polymer surfaces. In contrast to coating technologies, the surface is not coated, but modified. The fluorination process produces chemically stable fluorine compounds with covalent bonds that do not rely on weak Van-der-Waals-bondings as most coatings do.
Depending on the process parameters, fluorination can influence various surface properties. A distinction is made between fluorination without oxygen and with oxygen (oxy-fluorination).
The process can modify the following surface properties:
- Permanent hydrophilic
- Long-lasting activation of non-polar surfaces (for improved adhesion)
- Improved barrier against of fuel and gas permeation
- Reduced friction for elastomers and TPE
- Reduced migration of polymer additives
The surface is modified by the reaction of fluorine gas, which strongly reacts with hydrogen containing substances, forming hydrogen fluoride. The free functional sites can react with fluorine, oxygen or by crosslinking the polymer. Hydrogen fluoride and residual fluorine are absorbed by calcium carbonate in order to protect operators and environment.
A special advantage of the gas phase fluorination is the efficient treatment of complex geometries. Even the surface in holes and undercuts are treated completely and homogeneously.
INNOVENT has a close cooperation with users, contract treatment companies and the equipment construction company Fluor Technik System GmbH.
Dr. Arnd Schimanski
Phone: +49 3641 282510