Synthesis and electrical properties of polyaniline/polyaniline grafted multiwalled carbon nanotube mixture via in situ static interfacial polymerization
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- Synthesis and electrical properties of polyaniline/polyaniline grafted multiwalled carbon nanotube mixture via in situ static interfacial polymerization
- Jeon, In-Yup; Tan, Loon-Seng; Baek, Jong-Beom
- 4-aminobenzoic acid; Alkaline solutions; Analytical techniques; Cycle time; Cyclic voltammograms; De-doping; Electrical conductivity measurements; Electrical property; Elemental analysis; Functionalized; Functionalized MWNT; Homopolymers; In-situ; Interfaces; Interfacial polymerization; Organic phase; Phosphorous pentoxide; Polyphosphoric acids; SEM; TEM; Thermo-oxidative stability; Two-step reactions; Wide-angle x-ray diffraction
- Issue Date
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.48, no.9, pp.1962 - 1972
- The mixture of polyaniline (PANi) and PANi grafted multiwalled carbon nanotube (PANi-g-MWNT) was prepared by a two-step reaction sequence. MWNT was first functionalized with 4-aminobenzoic acid via "direct" Firedel-Crafts acylation in polyphosphoric acid (PPA)/phosphorous pentoxide (P(2)O(5)) medium to afford 4-aminobenzoyl-functionalized MWNT (AFMWNT). Then, aniline was polymerized via an in situ static interfacial polymerization in H(2)O/CH(2)Cl(2) in the presence of AFMWNT in organic phase to yield the mixture of PANi and PANi-g-MWNT. The mixture was characterized with a various analytical techniques such as elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR), wide angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), cyclic voltammogram (CV), UV-vis and fluorescence spectroscopies, and electrical conductivity measurement. On the basis of TGA analysis, the thermo-oxidative stability of the mixture was markably improved compared to that of PANi homopolymer. Even after dedoping, in alkaline solution, the mixture would still display semimetallic conductivity (4.9 S/cm). The capacitance of the mixture was also greatly enhanced and its capacitance decay with respect to cycle times was significantly reduced.
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