Camphor Sulfonic Acid Doped Preparation Of Soluble Polyaniline

Conducting polyaniline (PANI) has become the heat research area in the field of conducting polymer, because of its various structure, unique doping mechanism, excellent physical and chemical properties and wide prospect in applied technology. Many systemic studies indicate that the molecular structure, physical and chemical properties of polyaniline (PANI) doped on the synthesis method and reaction conditions, intensively. Aniline (An) was oxidized by ammonium persulfate (APS) in acidic aqueous solutions for the synthesis of polyaniline.In this paper, the camphor sulfonic acid (CSA) doped polyaniline (PANI) was polymerized in m-cresol (m-c) and chloroform (ch) mixed solvent, and researches for effects of the doping parameters such as time, temperature, the amount of dopant and the ratio of m-cresol (m-c) and chloroform (ch) mixed solvent for doping on conductivity of polyaniline (PANI). Four-probe method was used to measure the conductivity of doped polyaniline (PANI), the conductivity of which has good environmental stability. The structure and morphology of doped polyaniline (PANI) was characterized by FT-IR, TGA, X-ray diffraction and Scanning electron microscopy.Doped polyaniline not only can maintain a good solubility but also enhance their electrical conductivity. High conductivity of PANI-CSA was synthesized by doping temperature for 6℃, doping time for 24 h, PANI/CSA (mol/mol) for 1/50, m-c/ch (V/V) for 20/80. Maximum of conductivity was 400 S-cm-1. PANI-CSA had a good environmental stability and crystallinity. By adjusting the amount of dopant camphor sulfonic acid, the dense of membrane and uniformity was significantly improved with the increase of electrical conductivity. The thermal stability of Camphor sulfonic acid (CSA) doped polyaniline is better and the thermal gravity temperature of 280℃, is conducive to production and processing.