Tunable Electromagnetic Interference Shielding Properties of Binary Thermoplastic Composites Prepared by Reactive Microencapsulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43933916" target="_blank" >RIV/60461373:22310/22:43933916 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsapm.2c00084" target="_blank" >https://pubs.acs.org/doi/10.1021/acsapm.2c00084</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsapm.2c00084" target="_blank" >10.1021/acsapm.2c00084</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tunable Electromagnetic Interference Shielding Properties of Binary Thermoplastic Composites Prepared by Reactive Microencapsulation

Popis výsledku v původním jazyce

Thermoplastic composites integrating carbon nanotubes (CNT) and micron-sized metal particles dispersed in polymer matrices can address emerging multifunctional needs, (EMI) shielding combined with easy processing and affordable costs. Herein, an approach based on reactive microencapsulation is reported to prepare polyamide 6 (PA6)-based composites comprising binary loads of CNT and Al, Cu, or Fe particles. The microencapsulation is performed by activated anionic polymerization of epsilon-caprolactam in solution, in the presence of the metal/ CNT loads. The resulting hybrid microparticles are compressionmolded into plates containing effective metal/CNT loads in the range of 12-17 wt %. Among the materials synthesized, the one containing Al/CNT binary load (3:7 wt %) displays the highest EMI shielding effectiveness (SE) of 43.5 dB at 12 GHz, with a 2 mm thickness and an electrical conductivity Sigma dc of 6.61 x 10-3 S/cm. A synergetic effect is observed in all of the metal/CNT PA6 samples in terms of both Sigma dc and SE increase. Evidently, the presence of metal particles well dispersed in the conductive CNT network contributes to the mobility of the carriers and thus to the effective attenuation of the electromagnetic waves. Therefore, the binary composites of this study can be efficient thermoplastic EMI shielding materials.

Název v anglickém jazyce

Tunable Electromagnetic Interference Shielding Properties of Binary Thermoplastic Composites Prepared by Reactive Microencapsulation

Popis výsledku anglicky

Thermoplastic composites integrating carbon nanotubes (CNT) and micron-sized metal particles dispersed in polymer matrices can address emerging multifunctional needs, (EMI) shielding combined with easy processing and affordable costs. Herein, an approach based on reactive microencapsulation is reported to prepare polyamide 6 (PA6)-based composites comprising binary loads of CNT and Al, Cu, or Fe particles. The microencapsulation is performed by activated anionic polymerization of epsilon-caprolactam in solution, in the presence of the metal/ CNT loads. The resulting hybrid microparticles are compressionmolded into plates containing effective metal/CNT loads in the range of 12-17 wt %. Among the materials synthesized, the one containing Al/CNT binary load (3:7 wt %) displays the highest EMI shielding effectiveness (SE) of 43.5 dB at 12 GHz, with a 2 mm thickness and an electrical conductivity Sigma dc of 6.61 x 10-3 S/cm. A synergetic effect is observed in all of the metal/CNT PA6 samples in terms of both Sigma dc and SE increase. Evidently, the presence of metal particles well dispersed in the conductive CNT network contributes to the mobility of the carriers and thus to the effective attenuation of the electromagnetic waves. Therefore, the binary composites of this study can be efficient thermoplastic EMI shielding materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

ACS Applied Polymer Materials

ISSN

2637-6105

e-ISSN

2637-6105

Svazek periodika

4

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

3482-3490

Kód UT WoS článku

000812953700001

EID výsledku v databázi Scopus

2-s2.0-85127981143