Surface modification of polymers using plasma treatment can significantly impact the surface energy and wettability of the polymer. Plasma treatment is a process in which a polymer is exposed to a reactive gas plasma, typically generated by applying an electric field to a low-pressure gas. This treatment can lead to various chemical and physical changes on the polymer surface, which in turn can affect its surface energy and wettability.1. Surface energy: Plasma treatment can increase the surface energy of a polymer by introducing polar functional groups, such as hydroxyl, carbonyl, or carboxyl groups, onto the surface. These functional groups can interact with surrounding molecules through hydrogen bonding or other dipole-dipole interactions, leading to an increase in surface energy. A higher surface energy generally results in better adhesion, bonding, and wetting properties for the polymer.2. Wettability: Wettability is a measure of how well a liquid spreads on a solid surface, and it is closely related to the surface energy of the material. Plasma treatment can improve the wettability of a polymer by increasing its surface energy and modifying its surface roughness. The introduction of polar functional groups on the polymer surface enhances its affinity for polar liquids, such as water, leading to better spreading and wetting. Additionally, plasma treatment can create nano-scale roughness on the polymer surface, which can further improve wettability by increasing the surface area available for interaction with the liquid.In summary, plasma treatment can significantly impact the surface energy and wettability of polymers by introducing polar functional groups and modifying surface roughness. These changes can lead to improved adhesion, bonding, and wetting properties, making plasma-treated polymers suitable for various applications, such as coatings, adhesives, and biomedical devices.