Browsing by Author "Coetzee, Divan"
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- ItemCarbon coating to impart electrical conductivity to textile materialCoetzee, Divan; Wiener Jakub, prof. Ing. Ph.D. : 55161An epoxy/PEI/carbon coating was developed containing differing amounts of graphene or graphite to impart electrical conductivity onto a nonwoven viscose textile. It was found that an increase in carbon filler content resulted in increased electrical conductivity and that multiple coatings improved electrical conductivity further. Decyl glucoside surfactant improved particle mixing without influencing electrical conductivity. The coated material exhibited a minimum electrical resistivity in the megaohm range which makes it a relatively weak electrical conductor, however it can be considered as antistatic. The samples indicated no EMI shielding in the 30 MHz - 3 GHz range.
- ItemInfluence of Nanoparticles on Thermal and Electrical Conductivity of Composites(MDPI, 2020-03-27) Coetzee, Divan; Venkataraman, Mohanapriya; Militký, Jiří; Petrů, MichalThis review analyzes thermal and electrically conductive properties of composites and how they can be influenced by the addition of special nanoparticles. Composite functional characteristics—such as thermal and electrical conductivity, phase changes, dimensional stability, magnetization, and modulus increase—are tuned by selecting suitable nanoparticle filler material. The conductivity of composites can be related to the formation of conductive pathways as nanofiller materials form connections in the bulk of a composite matrix. With increasing use of nanomaterial containing composites and relatively little understanding of the toxicological effects thereof, adequate disposal and recyclability have become an increasing environmental concern.