ELECTRICAL CONDUCTIVITY AND MORPHOLOGY OF POLYANILINE/MONTMORILLONITE AND DERIVED GRAPHENE-CONTAINING NANOCOMPOSITES

1 VILÍMOVÁ Petra
Co-authors:
1,2 TOKARSKÝ Jonáš 1,2 PEIKERTOVÁ Pavlína 3 KULHÁNKOVÁ Lenka
Institutions:
1 VŠB - Technical University of Ostrava, Nanotechnology Centre, Ostrava, Czech Republic, EU, petra.vilimova@vsb.cz, jonas.tokarsky@vsb.cz, pavlina.peikertova@vsb.cz
2 VSB - Technical University of Ostrava, IT4Innovations, Ostrava, Czech Republic, EU, jonas.tokarsky@vsb.cz, pavlina.peikertova@vsb.cz
3 VSB - Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Ostrava, Czech Republic, EU, lenka.kulhankova@vsb.cz
Conference:
8th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 19th - 21st 2016
Proceedings:
Proceedings 8th International Conference on Nanomaterials - Research & Application
Pages:
739-744
ISBN:
978-80-87294-71-0
ISSN:
2694-930X
Published:
17th March 2017
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
30 views / 6 downloads
Abstract

Tapping mode atomic force microscopy (TM-AFM) and scanning spreading resistance microscopy (SSRM) were found to be useful scanning probe microscopy (SPM) techniques for the characterization of surface conductivity and morphology of the conductive ceramics-like and graphene-containing nanocomposite prepared from polyaniline/montmorillonite (PANI/MMT) nanocomposite. In this work, the changes in conductivity and morphology of PANI/MMT nanocomposites before and after heat treatment are studied. PANI/MMT nanocomposite was prepared using oxidative polymerization of anilinium sulfate by ammonium peroxydisulfate in the presence of MMT particles (size fraction < 40 µm). Prepared PANI/MMT powder was pressed into tablets using pressure 400 MPa. These tablets were calcined in dynamic argon atmosphere at temperature 1400 °C for 1 hour. The changes of local current on the surface and on the fractures (i.e. in the internal volume) of tablets were studied using SSRM and the local current maps of PANI/MMT nanocomposites before and after calcination were compared. SSRM shows that while after the calcination the conductivity in the internal volume of the sample strongly increased, the conductivity on the surface disappeared. Tapping mode is characterized by a less sample-tip interaction and, therefore, with respect to the nature of prepared nanocomposites, provides images without many visible artefacts.

Keywords: Polyaniline, montmorillonite, graphene, tapping mode atomic force microscopy, scanning spreading resistance microscopy
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