Vol.25, No.2, 2025, pp. 346–353
https://doi.org/10.69644/ivk-2025-02-0346

THERMOMECHANICAL AND ELECTROCHEMICAL PROPERTIES OF GRAPHENE/PVB FUNCTIONAL COATING

Milica Košević1 , Marija Baltić2 , Bojana Fidanovski3 , Miloš Vorkapić1 , Danica Bajić3*

1) University of Belgrade, Institute of Chemistry, Technology and Metallurgy - National Institute of the Republic of SERBIA

M. Košević https://orcid.org/0000-0002-2105-4425 ; M. Vorkapić https://orcid.org/0000-0002-3463-8665

2) University of Belgrade, Faculty of Mechanical Engineering, Belgrade, SERBIA

M. Baltić https://orcid.org/0000-0003-3998-0977

3) Military Technical Institute, Belgrade, SERBIA

B. Fidanovski https://orcid.org/0000-0002-9820-1999  D. Bajić https://orcid.org/0000-0002-2170-1995

*email: danica.bajic@mod.gov.rs

 

Abstract

This study investigates the thermomechanical resistance and electrochemical behaviour of a composite coating, based on a thermoplastic polymer, poly(vinyl butyral) (PVB), known for its great adhesion to various surfaces, with incorporated single-layer graphene nanoplatelets. Composite coating samples are produced by solvent-casting technology, in form of thin films in teflon moulds for the mechanical and thermal analyses, and on a thin carbon mat as a coated carrier for experimental electrode specimens. By employing Fourier-transform infrared spectroscopy the interaction of the incorporated graphene nanoplatelets with the polymer matrix is examined. Differential scanning calorimetry is applied to examine the thermal resistance of the hybrid material. For the obtained polymer/graphene films, mechanical properties are determined: indentation hardness and tensile strength. Electrochemical properties of the samples are investigated by cyclic voltammetry. Results obtained for samples with graphene nanoplatelets are compared to neat polymer and neat carbon mat and indicate that the inclusion of graphene significantly improves the materials’ thermomechanical resistance and their potential for use as an electrode material in electrochemical energy storage devices. These findings suggest that PBV/graphene composites and coatings are promising materials for advanced electrochemical applications.

Keywords: • poly(vinyl butyral) (PVB) • epoxy resin • graphene nano-platelets • graphene in supercapacitor applications • supercapacitive properties

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