화학공학소재연구정보센터
Materials Chemistry and Physics, Vol.146, No.1-2, 146-152, 2014
Polyaniline/TiO2/kaolinite: The composite material with high electrical anisotropy
Kaolinite-TiO2 nanocomposite matrix (KATI) coated with polyaniline (PANI) layer has been prepared in powder form and pressed into tablets. The conductivity was studied in dependence on (1) wt.% of TiO2 in KATI matrix and (2) thermal pre-treatment of KATI matrix. The anisotropy factor alpha, i.e. the ratio of inplane conductivity and conductivity in the direction perpendicular to the tablet plane, was found to be very high for PANI/KATI tablet (alpha is of the order of 10(3)-10(4)) in comparison with pure PANI tablet (alpha is of the order of 10(2)). Structure has been studied using Raman spectroscopy, X-ray diffraction analysis, scanning electron microscopy and molecular modeling. The possibility of using the tablets as a load sensors have been tested and tablets pressed from composites containing calcined KATI seem to be promising material for this purpose. (C) 2014 Elsevier B.V. All rights reserved.