Polyaniline-Doped Spherical Polyelectrolyte Brush Nanocomposites with Enhanced Electrical Conductivity, Thermal Stability, and Solubility Property

Abstract

Abstract:The synthesis procedure and dopant are crucial to the electrical conductivity, thermal stability, and solubility properties of polyaniline (PANI). In this paper, high-performance PANI was synthesized by means of chemical oxidative polymerization using anionic spherical polyelectrolyte brushes (ASPB) as dopant.The bonding structure, crystallographic structure, morphology, and thermal stability of the conductive nanocomposite were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermo-gravimetric analysis (TGA) respectively. Meanwhile, investigation on the electrical conductivity suggested that the room-temperature electrical conductivity of PANI doped with ASPB (PANI/ASPB) was 19.3 S/cm, which was higher than that of PANI (7.0 S/cm), PANI doped with poly(sodium-p-styrenesulfonate) (PSS) (PANI/PSS) (14.6 S/cm), PANI doped with SiO 2 (PANI/SiO 2 ) (18.2 S/cm), and PANI doped with canonic spherical polyelectrolyte brushes (CSPB) (PANI/CSPB) (8.0 S/cm). Meanwhile, the addition of ASPB improved the thermal stability and solubility properties of PANI. ASPB played the role of template. Conductive mechanism of PANI/ASPB nanocomposite can be explained by the theoretical models of three-dimensional variable range-hopping (3D VRH).

Conductive polymer containing graphene aerogel composites as sensor for CO2

“…As can be further shown in the FT-IR spectrum of GA/PANi and GA/ PPy IPCs in Fig. 4, some characteristic peaks of PANi are appeared in the spectrum of GA/PANi such as benzenoicquinonic nitrogen vibration at 1,557 cm 21 , aromatic C-C peaks at 1,503 cm 21 , C-N-C peaks at 1,216 cm 21 , and N-H stretching peaks at 1,132 cm 21 that are in agreement with the literature [46,47]. Moreover, there is also two new peaks can easily be seen in FT-IR spectrum of GA/ PPy IPCs for PPy as N-C stretching at 826 cm 21 substantiating the presence of polymerized Py, and 5C-H out of plane vibration corroborating the further evidence for the polymerization of Py at 948 cm 21 [48].…”

Potassium Ion Selective Electrode Using Polyaniline and Matrix-Supported Ion-Selective PVC Membrane

“…The CV result in Fig 4a indicates that some portion of the produced PANI is leucoemeraldine, which has the worst electrical conductivity among PANI (10 −10 -10 −8 S/cm) states. Fortunately, leucoemeraldine is very unstable and can easily be converted to emeraldine salt, which is electrically conducting (10 −2 -10 −1 S/cm), when dipped in an acidic medium [44], [45]. Figure 5a shows a Nyquist plot from EIS measurements of bare SPE and SPE/PANI in 0.1 M KCl solution with a modulation amplitude of 10 mV and the corresponding simulation results in line.…”

H2S Sensing Material Based on Cotton Fabrics Modified with Polyaniline

“…[36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] PAni's electrical and optical properties are dependent on the different oxidations states of this conducting polymer. [32,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] These oxidation states are leucoemeraldine, protoemeraldine, emeraldine, nigraniline and pernigraniline. However, the three most studied oxidation states are leucoemeraldine (y ¼ 0completely reduced state), emeraldine (y ¼ 0.5) and pernigraniline (y ¼ 1fully oxidized state).…”

“…PAni is one of the most studied conducting polymers of the past 50 years . PAni's electrical and optical properties are dependent on the different oxidations states of this conducting polymer . These oxidation states are leucoemeraldine, protoemeraldine, emeraldine, nigraniline and pernigraniline.…”