The activation effect of plasma can form polar functional groups such as carbonyl (-CO), carboxyl (-COOH), and hydroxyl (-OH) on the surface of materials. These functional groups have stable functions and play a positive role in adhesion and hydrophilicity. The main feature is to increase surface energy. For polymers, the low surface energy leads to poor adhesion. By plasma activation, surface energy can be increased, thereby changing the chemical properties of the surface to enhance surface adhesion and bonding strength.
Schematic Diagram of Plasma Activation
The above are the changes in hydrophilicity before and after plasma activation treatment. From the image, it can be seen that before plasma activation treatment, the contact angle between the material surface and water droplets is relatively large, resulting in poor adhesion of the material. After plasma activation treatment, the contact angle between the material surface and water droplets decreases, indicating stronger adhesion of the material. Therefore, it can be concluded that plasma activation can increase surface energy, alter surface chemical properties, and enhance surface adhesion.
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