Micromorphology and conductive property of the pellets prepared by HCl-doped polyaniline nanofibers

摘要

HCl-doped polyaniline nanofibers having a long nanosize fibril structure were prepared by an inverse microemulsion polymerization process using nanosize Ni particles as inorganic template. Powders of the polyaniline nanofibers were pressed to pellets in thickness of about 0.3 mm and in diameter of 13 mm. Micromorphology and conductive property of the pellets were studied by using scanning electron microscopy as well as by measuring the conductivity at room temperature and the variation of conductivity with temperature in 80-290 K. The pellets consist of granular particles and nanofibers. An array direction of the polyaniline nanofibers in the pellet is random. The conductivity of the pellets at room temperature is 0.55 +/- 0.03 S/cm. The variation of conductivity with temperature reveals that the conductive mechanism can be considered to be three-dimensional variable-range-hopping (3D-VRH). (C) 2004 Elsevier B.V. All rights reserved.