Morphology, Conductivity and Microwave Absorption Behavior of Polyaniline Nanocomposites after Chemical Treatment
| Autor: | Desmond Ang Teck Chye, Sook-Wai Phang, Nurrafiqah Mokhtar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Fullerene Nanocomposite Polymers and Plastics 02 engineering and technology Dielectric Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Aniline Monomer chemistry Chemical engineering Titanium dioxide Polyaniline Materials Chemistry Ceramics and Composites 0210 nano-technology |
| Zdroj: | Polymers and Polymer Composites. 25:545-554 |
| ISSN: | 1478-2391 0967-3911 |
| DOI: | 10.1177/096739111702500706 |
| Popis: | In this study, the hexanoic acid (HA) doped Polyaniline (PAni) nanocomposites which comprise aniline (Ani) as a monomer, titanium dioxide (TiO2) as a dielectric material and fullerene (C60) as a carbonaceous material with and without treated with different types of sulfonic groups: dioctyl sodium sulfosuccinate (AOT), sodium dodecylbenzene sulfonicate (DBSA) and camphorsulfonic acid (CSA) were synthesized through the template-free method. The fourier transform infrared (FTIR), ultraviolet-visible (UV-vis), x-ray diffraction (XRD) and thermal gravimetric analysis (TGA) characterization of PAni nanocomposites validated the functional groups, conducting behavior, existing of an inorganic material and thermal stability of PAni nanocomposites, respectively. Besides, an increment of electrical conductivities of the PAni nanocomposites from 3.655 × 10−2 S/cm (without chemical treatment) to 5.433 × 10−2 – 1.708 × 10−1 S/cm (after chemical treatment) was obtained by the four-point probe method. This increment can be explained by the formation of nanorods/nanotubes via field emission scanning electron microscope (FESEM). Based on the data obtained from the microwave vector network analyzer (MVNA), the PAni/HA/TiO2/C60 nanocomposites (treated with CSA) revealed a narrow and sharp reflection loss (RL) peak with high absorption (−61.3 dB) due to its highest conductivity, dielectric permittivity and heterogeneity which eventually enhanced the microwave absorption properties, while those without chemical treatment showed a broad RL peak with poor absorption (−37.2 dB). Based on the researchers’ knowledge, the PAni/HA/TiO2/C60 nanocomposites with a chemical treatment that shows a good absorption is the first being reported here. |
| Databáze: | OpenAIRE |
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