(A) Etching effect on the surface of the material

Physical action A large number of ions, excited molecules, free radicals and other active particles in the plasma act on the surface of the solid sample to remove the original contaminants and impurities on the surface, and will cause etching to change the surface of the sample. Rough, many fine pits are formed, which increases the specific surface of the sample. Improves wetting properties of solid surfaces.

(B) Activation bond energy, cross-linking effect

The particle energy in the plasma is 0~20eV, and most of the bond energy in the polymer is 0~10eV. Therefore, after the plasma acts on the solid surface, the original chemical bonds on the solid surface can be broken, and the These bonds in the free radicals form a network-like cross-linked structure that greatly activates the surface activity.

(C) Forming new functional groups

Chemical action If a reactive gas is introduced into the discharge gas, a complex chemical reaction will occur on the surface of the activated material, and new functional groups, such as hydrocarbon groups, amino groups, carboxyl groups, etc., are introduced. These functional groups are active groups, which can significantly improve the surface of the material. active.