Analysis of Low Temperature Plasma on Polyurethane Surface

Polyurethanes are commonly used as biomaterials due to their excellent mechanical properties and biocompatibility. The surface of polyurethane is not good enough for cell adherence and growth. Many surface modification techniques exist for producing surface that improves cell adhesion and proliferation. In this paper, the surface of polyurethane was modified by low temperature plasma with ammonia. SEM measurements found topographic variation of the surface. And the chemical composition and the function groups of the polyurethane surface were investigated by x-ray photoelectron spectroscopy (XPS). The result shows that the structure and the properties of the modified materials have changed obviously. It was found that some functional groups were exposed on the surface, which enhanced the cell adhesion.