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Author Tokarský, Jonáš ♦ Kulhánková, Lenka ♦ Neuwirthová, Lucie ♦ Mamulová Kutláková, Kateřina ♦ Vallová, Silvie ♦ Stýskala, Vítězslav ♦ Čapková, Pavla
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ANISOTROPY ♦ CLATHRATES ♦ COMPRESSION ♦ COMPUTERIZED SIMULATION ♦ ELECTRIC CONDUCTIVITY ♦ HARDNESS ♦ MONTMORILLONITE ♦ NANOCOMPOSITES ♦ ORGANIC POLYMERS ♦ POWDERS ♦ RAMAN SPECTROSCOPY ♦ SULFATES ♦ SURFACES ♦ THERMAL GRAVIMETRIC ANALYSIS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ TWO-DIMENSIONAL SYSTEMS ♦ X-RAY DIFFRACTION
Abstract Highlights: • Montmorillonite (MMT) can be intercalated with polyaniline (PANI) chains. • Tablets pressed from PANI/MMT exhibit high anisotropy in electrical conductivity. • Pressure 28MPa is sufficient to reach the anisotropy. • Tablets pressed from pure PANI also exhibit anisotropy in electrical conductivity. - Abstract: Polyaniline-montmorillonite nanocomposite was prepared from anilinium sulfate (precursor) and ammonium peroxodisulfate (oxidizing agent) using simple one-step method. The resulting nanocomposite obtained in powder form has been pressed into tablets using various compression pressures (28–400 MPa). Electrical conductivities of tablets in two perpendicular directions, i.e. direction parallel with the main surface of tablet (σ=) and in orthogonal direction (σ⊥), and corresponding anisotropy factors (i.e., the ratio σ=/σ⊥) have been studied in dependence on compression pressure used during the preparation. Polyaniline-montmorillonite nanocomposite was characterized using X-ray diffraction analysis, raman spectroscopy, transmission electron microscopy, thermogravimetric analysis and molecular modeling which led to the understanding of the internal structure. Measurement of hardness performed on pressed tablets has been also involved. Taking into account the highest value of anisotropy factor reached (σ=/σ⊥ = 490), present study shows a chance to design conductors with nearly two-dimensional conductivity.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 75


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