A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High electrical anisotropy in hydrochloric acid doped polyaniline/phyllosilicate nanocomposites: Effect of phyllosilicate matrix, synthesis pathway and pressure
Abstract Pressed tablets from polyaniline/phyllosilicate nanocomposites have been prepared under various conditions in order to optimize anisotropic conductivity of composite by ordering of flat phyllosilicate particles intercalated with polyaniline (PANI). Powder samples of PANI/phyllosilicate nanocomposites have been prepared using two phyllosilicates, montmorillonite and vermiculite, with a different layer charge. Two precursors were used, anilinium hydrochloride and anilinium sulfate. Prepared PANI/phyllosilicate composites were subsequently doped by hydrochloric acid via rinsing after polymerization process and for the DC conductivity measurements pressed into tablets. Applied pressure was 28MPa and 128MPa. Highly anisotropic conductivity has been achieved in pressed tablets. The in-plane conductivity for PANI/montmorillonite was 0.084S/cm, i.e., 1000× higher than in the direction perpendicular to the tablet plane. Increase of pressure up to 128MPa led to dramatic decrease of conductivity.
Graphical abstract Display Omitted
Highlights The strong texture of pellets is in agreement with anisotropy in conductivity (σ).For PANI/MMT pellet the in-plane σ is 1000× higher than σ in orthogonal direction.PANI/MMT pellets represent a functional unit with the 2D conductivity.For pellets, the applied pressure 28MPa is more suitable than 128MPa.
High electrical anisotropy in hydrochloric acid doped polyaniline/phyllosilicate nanocomposites: Effect of phyllosilicate matrix, synthesis pathway and pressure
Abstract Pressed tablets from polyaniline/phyllosilicate nanocomposites have been prepared under various conditions in order to optimize anisotropic conductivity of composite by ordering of flat phyllosilicate particles intercalated with polyaniline (PANI). Powder samples of PANI/phyllosilicate nanocomposites have been prepared using two phyllosilicates, montmorillonite and vermiculite, with a different layer charge. Two precursors were used, anilinium hydrochloride and anilinium sulfate. Prepared PANI/phyllosilicate composites were subsequently doped by hydrochloric acid via rinsing after polymerization process and for the DC conductivity measurements pressed into tablets. Applied pressure was 28MPa and 128MPa. Highly anisotropic conductivity has been achieved in pressed tablets. The in-plane conductivity for PANI/montmorillonite was 0.084S/cm, i.e., 1000× higher than in the direction perpendicular to the tablet plane. Increase of pressure up to 128MPa led to dramatic decrease of conductivity.
Graphical abstract Display Omitted
Highlights The strong texture of pellets is in agreement with anisotropy in conductivity (σ).For PANI/MMT pellet the in-plane σ is 1000× higher than σ in orthogonal direction.PANI/MMT pellets represent a functional unit with the 2D conductivity.For pellets, the applied pressure 28MPa is more suitable than 128MPa.
High electrical anisotropy in hydrochloric acid doped polyaniline/phyllosilicate nanocomposites: Effect of phyllosilicate matrix, synthesis pathway and pressure
Tokarský, J. (author) / Kulhánková, L. (author) / Stýskala, V. (author) / Mamulová Kutláková, K. (author) / Neuwirthová, L. (author) / Matějka, V. (author) / Čapková, P. (author)
Applied Clay Science ; 80-81 ; 126-132
2013-06-27
7 pages
Article (Journal)
Electronic Resource
English
METHOD FOR GRINDING A PARTICULATE PHYLLOSILICATE MATERIAL
| European Patent Office | 2015