Performance Research On Process Parameters And Electrical Properties Of Electrospun Polyaniline

Electrospinning was a simple method to prepare micro-nanoscaled fibers. The controllability of PANI electrospun fibers'microcosmic pattern and conductivity redounded to accelerate the speed of the application of conducting polymer in electronic area, nano wire and sensing device.In this dissertation, the doping induced method, emulsion polymerization extraction method and emulsion polymerization were adopted to prepare PANI with different molecular weight and conductivity for researching of electrospun process parameters. These influencing factors were complicated and interacted, and the optimum parameters were varied in different polymer solution.The concentration of PANI and PEO, molecular weight, conductivity of PANI, and solvents were primarily influencing factors of electrospun fibers'microcosmic pattern. The increase of polyaniline's molecular weight and conductivity could improve the electrospun property and fibers'diameter increased with the concentration of PANI and PEO, dielectric constant of solvent and the molecular weight of PANI. The fibers'microcosmic pattern was also related to processing parameters such as electric voltage, acception distance and the polymer solution flow rate. Selecting appropriate voltage and acception distance could obtain optimum electrospun fibers with smaller fibers'diameters and better continuous fibers. Furthermore, the fibers'diameter increased with solution flow rate.Compared with the cast-film, electrospun fibers had huge specific surface area and the influencing factors of charge transfer were intricate. We discussed the mainly factors effected the conductivity of electrospun fibers such as the concentration of PANI and PEO, the porosity and the solvents. The electrospun fibers'conductivity increased with the concentration of PANI and the solvent dielectric constant, and decreased with the porosity. When these factors took place synchronously, the porosity factor was most important.Through our research on process parameters , PANI electrospun fibers with high controllability and specific surface area were preparation. Through the systematic study of electrospun fibers'electrical property, the dream of designable electrospun fibers'conductivity came true and the study possessed extensive reference value.