Facile transformation of graphite composites into their porous analogues with superior electrical, thermal, and EMI shielding properties

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63595819" target="_blank" >RIV/70883521:28610/25:63595819 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1359836825007334?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1359836825007334?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.compositesb.2025.112827" target="_blank" >10.1016/j.compositesb.2025.112827</a>

Result language
angličtina
Original language name
Facile transformation of graphite composites into their porous analogues with superior electrical, thermal, and EMI shielding properties
Original language description
Novel porous conducting polymer composites were prepared through the direct expansion of expandable graphite within a melted polypropylene matrix. A facile in-situ method resulted in a remarkable reduction in the electrical percolation threshold of composites containing expanded graphite, forming an accordion-like network inside the polymer matrix compared to their non-expanded compact analogues. Despite their porosity, the expanded samples showed increased thermal conductivity, and the variation of electrical and thermal conductivity with the filler concentration adhered to the percolation theory and Lichtenecker model, respectively. Depending on the concentration, the expansion process notably enhanced the electromagnetic interference (EMI) shielding efficiency, producing a composite with shielding performance above 20 dB. The presented strategy enables a facile and cost-effective improvement of the electrical, thermal, and EMI shielding properties without affecting the weight of the composite, making it highly relevant for industrial adoption.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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