플라즈마 공정조건에 따른 티타늄 표면의 카르복실기의 함량 변화에 관한 연구

Abstract

Plasma surface modification can be used to improve the surface properties of commercial pure Ti by creating functional groups to produce bioactive materials with different surface topography. The purpose of this study was to investigation of optimum conditions of plasma polymerization by changing plasma discharge power. Titanium surface modification was carried out by depositing an thin polymeric layer containing carboxyl groups through plasma polymerization using an acrylic acid (AA) monomer. The chemical structure and morphology of poly acrylic acid (PAA) film surface were investigated by X-ray photoelectron spectroscopy (XPS), fourier transform infrared (FT-IR), and scanning electron microscopy (SEM). Hydrophilic property was measured by contact angle. The content of carboxyl group was measured by TBO assay using a toluidine blue O. All chemical analysis showed polymeric PAA thin film containing COOH groups on the titanium surface. In the 70W of plasma RF power, content of carboxyl group is higher than other plasma conditions. In contrast, value of contact angle in 50W plasma power show the lowest value than that of plasma power.