Study Of Surface Modification Investigation By Using Atmospheric Pressure Plasma

Plasma surface modification technology with its unique advantage in the land areas of modern science and technology to play an important role, especially in the biological engineering, medical, industrial fields been concerned. This technology in not damage material internal characteristics, can well, selective make the nature of the material surface and biological function characteristics get change.This paper,we report a method to generate a reliable and homogeneous brush-shape air plasma plume at atmospheric pressure for surface modification of PET polymers and biomedical applications. The room-temperature air plasma plume consists of well-aligned and stable microplasma jets formed in the vicinity of the ends of hollow optical fibers at atmospheric pressure. This plasma plume may lead to the uniform and large-area surface modification of PET polymers. The plasma plume may efficiently prevent the heat-sensitive polymers from being damaged and significantly affect the surface properties of treated polymers, such as surface chemical compositions, hydrophobicity, and biocompatibility. Compared to a high density of blood platelets adhering onto the untreated PET sample, no adhesion of blood platelets is observed on the plasma-activated PET sample due to the surface functionalization.The reaction processes of plasma-activated species at the surface of treated polymers are discussed based on the obtained experimental results.