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Author

Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
Research Interests
  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Grafting of Polyaniline onto the Surface of 4-Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties

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Title
Grafting of Polyaniline onto the Surface of 4-Aminobenzoyl-Functionalized Multiwalled Carbon Nanotube and Its Electrochemical Properties
Author
Jeon, In-YupKang, Sang-WookTan, Loon-SengBaek, Jong-Beom
Keywords
-aminobenzoic acid; Chemical oxidative polymerization; Electrical conductivity; Electrical conductivity measurements; Elemental analysis; Friedel-crafts acylation; Functionalized; Functionalized MWNT; High performance polymer; High-performance polymers; Polyphosphoric acid; Polyphosphoric acids; Scanning electrons; Thermo-oxidative stability; Two-step reactions; UV-Vis absorption spectroscopy; Wide-angle X-ray diffraction
Issue Date
201007
Publisher
JOHN WILEY & SONS INC
Citation
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.48, no.14, pp.3103 - 3112
Abstract
Polyaniline (PANi)-grafted multiwalled carbon nanotube (MWNT) composite is prepared by a two-step reaction sequence. MWNT is first functionalized with 4-aminobenzoic acid in polyphosphoric acid/phosphorous pentoxide as a "direct" Friedel-Crafts acylation reaction medium. The resultant 4-aminobenzoyl-functionalized MWNT is then treated with aniline using ammonium persulfate/aqueous hydrochloric acid to promote a chemical oxidative polymerization, leading to PANi-grafted MWNT composite. The resultant composite is characterized by elemental analysis, Fourier-transform infrared spectroscopy, wide-angle X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, UV-vis absorption spectroscopy, fluorescence spectroscopy, cyclic voltammetry, and electrical conductivity measurement. The thermooxidative stability and electrical conductivity of PANi-grafted MWNT composite are improved compared to those of PANi. Specifically, the electrical conductivity of PANi-grafted MWNT is improved 10900 times depending upon the level of doping. The capacitance of the composite is also greatly enhanced.
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DOI
http://dx.doi.org/10.1002/pola.24091
ISSN
0887-624X
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