Structural investigation of lignosulfonate doped polyaniline

• Published in: Synthetic metals Vol. 159; no. 17-18; pp. 1761 - 1766
• Main Authors: Shao, L., Qiu, J.H., Feng, H.X., Liu, M.Z., Zhang, G.H., An, J.B., Gao, C.M., Liu, H.L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-09-2009; Elsevier
• Subjects: Applied sciences; Conductivity; Exact sciences and technology; Lignosulfonate; Organic polymers; Physicochemistry of polymers; Polyaniline; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Stability; Template; Conductivity; Stability; Polyaniline; Lignosulfonate; Template; Electrical conductivity; Electrical properties; Temperature effect; Experimental study; Thermal stability; Conducting polymers; Morphology; Preparation; Concentration effect; Doped polymer; Amidosulfuric acid; Oxidative polymerization; Aniline polymer
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2009.05.022

Lignosulfonate doped polyaniline (LGS-PANI) was prepared in the presence of sulfamic acid as a novel conducting filler. The room temperature conductivity of LGS-PANI increases more than two-fold with LGS at a mass fraction of 11.4wt% and these conductivities (0.73–5.00S/cm) exceed the highest reported for polymer acid-doped PANI systems. The conductivity stability and thermal stability are clearly improved at a certain content of LGS in LGS-PANI. These trends are accompanied by significant structural changes as evidenced by X-ray diffraction studies. The material characterization was also carried out by Fourier transform IR spectroscopy, thermogravimetric analysis and scanning electron microscopy.