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Hydrophilic literally means water-loving, which means that a substance interacts strongly with water (or other polar substances). When talking about hydrophilic surfaces, they are always covered by a mostly invisible water film. Most metals are hydrophilic, as are glass surfaces. Hydrophilic surfaces have contact angles to water close to 0°.

Implantat vor und nach der Plasmabehandlung

Implant before plasma treatment hydrophobic (left) and hydrophilic after plasma treatment (right)

The opposite of hydrophilic is hydrophobic. Plasma treatment converts hydrophobic surfaces into a hydrophilic state, as then adhesives, lacquers etc. adhere better and an increase in quality can be achieved.

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