TY - JOUR

T1 - Electromagnetic interference shielding performance of Ag/multi-walled carbon nanotubes-poly(methyl methacrylate) composites

AU - Kazakova, Mariya A.

AU - Golubtsov, Georgiy V.

AU - Selyutin, Alexander G.

AU - Ishchenko, Arcady V.

AU - Serkova, Alexandra N.

AU - Gorokhov, Gleb V.

AU - Misiyuk, Philip Y.

AU - Valynets, Nadzeya I.

N1 - Acknowledgements: The reported study was funded by RFBR and BRFBR, project numbers 20-53-04008 and F21РМ-022, respectively. XRF study was supported by the Ministry of Science and Higher Education of the Russian Federation within the state assignment for Boreskov Institute of Catalysis (project # АААА-А21-121011390054-1). A.V. Ishchenko acknowledge core facilities “VTAN” (Novosibirsk State University) for the access to its experimental equipment (HRTEM). The authors are grateful to Daria Meisak for the help in conducting research on the electromagnetic properties of composites, interpretation of the obtained data, and fruitful discussions.

PY - 2023/10/1

Y1 - 2023/10/1

N2 - An efficient strategy for synthesizing Ag/multi-walled carbon nanotubes-poly(methyl methacrylate) (Ag/MWCNT-PMMA) composites has been proposed. The synthesis concept is based on the modification of oxidized MWCNT with Ag nanoparticles and subsequent distribution of the obtained Ag/MWCNT-Ox hybrids in a PMMA matrix. Herein, Ag/MWCNT-Ox hybrids with various size and content of Ag nanoparticles serve as a tool for tuning the electrical conductivity of the two series of Ag/MWCNT-PMMA composites with MWCNT-Ox content before (4 wt%) and after (10 wt%) the percolation threshold. Adding 0.2 wt% of Ag to the first composite series with nanotubes content of 4 wt% leads to a decrease in the percolation threshold in a three-component system. In the case of the second composite series, the introduction of Ag up to 1 wt% leads to a monotonic increase in the conductivity within one order of magnitude. Ag/MWCNT-PMMA demonstrates high shielding efficiency for incident radiation in the frequency range of 26–37 GHz, most of which is absorbed due to the conductive nature of the material. The improved electromagnetic properties of the Ag/MWCNT-PMMA composites are explained by the uniform distribution of fillers in the polymer, which ensures the formation of a 3D conducting network inside the composite, and by the synergistic interaction between MWCNT and Ag. Thus, Ag/MWCNT-PMMA composites have broad application prospects in the field of electromagnetic compatibility.

AB - An efficient strategy for synthesizing Ag/multi-walled carbon nanotubes-poly(methyl methacrylate) (Ag/MWCNT-PMMA) composites has been proposed. The synthesis concept is based on the modification of oxidized MWCNT with Ag nanoparticles and subsequent distribution of the obtained Ag/MWCNT-Ox hybrids in a PMMA matrix. Herein, Ag/MWCNT-Ox hybrids with various size and content of Ag nanoparticles serve as a tool for tuning the electrical conductivity of the two series of Ag/MWCNT-PMMA composites with MWCNT-Ox content before (4 wt%) and after (10 wt%) the percolation threshold. Adding 0.2 wt% of Ag to the first composite series with nanotubes content of 4 wt% leads to a decrease in the percolation threshold in a three-component system. In the case of the second composite series, the introduction of Ag up to 1 wt% leads to a monotonic increase in the conductivity within one order of magnitude. Ag/MWCNT-PMMA demonstrates high shielding efficiency for incident radiation in the frequency range of 26–37 GHz, most of which is absorbed due to the conductive nature of the material. The improved electromagnetic properties of the Ag/MWCNT-PMMA composites are explained by the uniform distribution of fillers in the polymer, which ensures the formation of a 3D conducting network inside the composite, and by the synergistic interaction between MWCNT and Ag. Thus, Ag/MWCNT-PMMA composites have broad application prospects in the field of electromagnetic compatibility.

KW - Ag nanoparticles

KW - Electromagnetic interference shielding

KW - Hybrid structures

KW - Multi-walled carbon nanotubes

KW - Polymer composite

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85165167224&origin=inward&txGid=369d25c8cb42754be3cc34a82879efb6

UR - https://www.mendeley.com/catalogue/b1a57586-547f-3c38-bbe8-4c859271f1b9/

U2 - 10.1016/j.matchemphys.2023.128176

DO - 10.1016/j.matchemphys.2023.128176

M3 - Article

VL - 307

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

M1 - 128176

ER -