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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Composites Part B: Engineering

ISSN

1359-8368

e-ISSN

1879-1069

Svazek periodika

306

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

nestránkováno

Kód UT WoS článku

001540766400001

EID výsledku v databázi Scopus

2-s2.0-105011252857