Preparation Of Polyaniline Nanostructure In The Non-aqueous System And Studies On Their Gas Sensitivity

In this article, we prepared the polyaniline nanostructure in the non-aqueous system through the chemical oxidative polymerization. In the system, we use acetone as the solvent, ammonium persulfate (APS) as oxidant, with different organic acid as the dopant, and also without acid, we succeeded got the polyaniline nanostructure in different morphology. The final products were all characterized by chemical means. We also studied the gas sensitivity of the products. In this study, We obtained the following results.1. We use acetone as the solvent, cellulose acetate were added into the solvent to make the emulsion. Than we added oxalic acid and APS, which were regarded as dopant and oxidant, respectively. The structure and morphology of the final PANI were characterized by Fourier transform infrared (FT-IR) spectrum, X-ray diffraction (XRD) pattern, Scanning electron microscopy (SEM) images, and Cyclic voltammetry (CVs), respectively. A potential mechanism of PANI nanospheres formation was studied. The conductivity of the PANI nanospheres is 0.044 S/cm.2. Acetone was used as the solvent, Adipate and APS were regarded as dopant and oxidant, respectively. We got a fiber net morphology of PANI materials. The structure and morphology of the final PANI were also characterized.3. Acetone was used as the solvent, oxalic acid and APS were regarded as dopant and oxidant, respectively. We got the fiber slot morphology of PANI nanostructure. The structure and morphology of the final PANI were characterized by Fourier transform infrared (FT-IR) spectrum, ultraviolet-visible absorption spectra (UV-vis), and X-ray diffraction (XRD) pattern and Scanning electron microscopy (SEM) images, respectively. Meanwhile, the material displays a high conductivity, that the conductivity of the PANI product is 0.47S/cm.4. Acetone was used as the solvent, without any dopant acid, with APS as oxidant, respectively. We got the donut morphology of PANI materials by self-assemble method. The structure and morphology of the final PANI were also characterized. We also studied the gas sensitivity of the product to NH3 .5. The polyaniline nanostructure with high surface areas, small diameter, and porous nature have better performance in both sensitivity and time response. Therefore, we examine the sensitivity and time response of polyaniline nanomaterials in more details. The PANI materials have super performance in sensitivity, time response, and reversibility to NH3. The sensitivity of PANI-Adipate to different gas NH3,N2H4 and (C2H5)3N were especially studied. The results showed that PANI-Adipate material has the best sensitivity to (C2H5)3N.