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Structure and properties of selenious acid doped polyaniline with varied dopant content

2010; Elsevier BV; Volume: 160; Issue: 11-12 Linguagem: Inglês

10.1016/j.synthmet.2010.04.004

1879-3290

Ngo Trinh Tung, Hoik Lee, Yeari Song, Nguyễn Đức Nghĩa, Daewon Sohn,

Advanced Sensor and Energy Harvesting Materials

Abstract In this study, the effects of dopant content on the structure, especially crystalline structure, and properties of selenious acid doped polyaniline (PAni) were investigated. The structure and properties of PAni were characterized by X-ray diffraction, FTIR spectroscopy, UV–vis spectroscopy, DSC, and TGA. By varying the dopant/monomer molar ratio (D/M), the morphology as well as the crystalline structure of PAni was significantly changed. The presence of water in the crystalline structure of PAni prepared with a low D/M ratio caused a change in the d-spacing of the PAni crystalline structure. The oxidation level and doping degree of PAni were also changed by varying the D/M ratio. The electrical conductivity of PAni increased with increasing D/M ratio, and the thermal stability of PAni in the doped state was about 200 °C for different D/M ratios.