PAA polymerized downstream of a high pressure DBD plasma

The aim of this work is to develop functional materials by using a high pressure dielectric barrier discharge (DBD). As an exploration the polymers were deposited downstream of the DBD plasma. For this purpose the plasma polymer obtained from a purely organic compound, acrylic acid (AA), for the carboxyl group film as example was characterized. The properties of the coating were determined by the contact angle measurement, Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). It revealed that the contact angle could be minimized ca. 3° in high pressure plasma polymerization film, and the density of the carboxyl group was retained as high as ca. 33.3% at 2200 Pa working pressure but depending on the working pressure.