Improving Surface Hydrophilic Characteristics of Polymer by Plasma Inducing Graft Polymerization

摘要

A plasma-induced device is fabricated and used to process the inertia polypropylene which is of simple structure and easy analyzing. The effects of the technology parameters of plasma-treatment on the surface properties of polypropylene are investigated and then the plasma-induced polymerization is applied to the medicine biomaterials of Poly(DL-lactic acid-co-glycolic acid)(PGLA). PP film is grafted acrylic acid by plasma. It has been proved that the surface of the film lives carboxyl by FTIR. The concentration of carboxyl has been measured through the dyeing method. Besides, the surface contact angle about the dealt film is measured. It is concluded that the polymerization by plasma can obviously improve the hydrophilic properties of the PP film surface. Through controlling the degree of the grafting of the film surface by choosing the technology parameters of plasma-treatment, the films of different contact angle with H_2O are obtained. The experiment also shows the surface hydrophilic nature of the PGLA is improved.