摘要：This study deals with estimation of the surface free energy of thin films of polyaniline doped with phosphoric acid,by measuring contact angles. Synthesis of polyaniline (PANI) with phosphoric acid (PA) was performed at room temperature of 20°C,and at 0°C. Thin films were obtained by means of a spin coater,applying the synthetized mixture on a glass substrate. By measuring the contact angle,first between ethylene glycol and a film and then between distilled water and a film,we thus calculated the polar, dispersion and total surface free energy. It was proved and demonstrated that the surface free energy depends on the temperature at which the solution (from which the thin films are obtained later) was synthesized.
关键词：polyaniline;phosphoric acid;thin films;contact angle;surface free energy
