MXene interlayered crosslinked conducting polymer film for highly specific absorption and electromagnetic interference shielding
Materials Advances, ISSN: 2633-5409, Vol: 1, Issue: 2, Page: 177-183
2020
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Article Description
In this work, the electromagnetic interference (EMI) shielding properties of an MXene interlayered crosslinked conducting poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) polymer film are investigated. The introduction of a crosslinker into PEDOT:PSS makes PEDOT:PSS water insoluble. An average EMI shielding effectiveness (SE) of ∼41 dB (corresponding to 99.999% blockage) was obtained for a solution coated 6 ± 0.2 μm thick optimized crosslinked PEDOT:PSS-TiCT MXene (XPM50) nanocomposite film. Electrodynamic modelling and simulation also suggest an excellent SE for this nanocomposite system. From an application point of view, the specific EMI SE (SSE)/thickness (t) or absolute EMI SE is the most useful factor. The absolute EMI SE of the XPM50 film is observed to be 89 924 dB cm g, which is nearly nine times higher than that of the pristine PEDOT:PSS film and more than three times higher than that of the TiCT MXene film. Mechanistically, the superior EMI shielding due to absorption (SE) is intrinsically predominant. The crosslinked PEDOT:PSS interconnects with the TiCT MXene flakes, generating more absorption sites and enhanced electrical conductivity which is responsible for the high SE value. The XPM50 film also fulfils many commercial requirements, especially solution processability and outstanding absolute EMI SE, which makes it an attractive EMI shield for real time applications such as telecommunications, health care systems, detective systems, defence, and aerospace applications.
Bibliographic Details
Royal Society of Chemistry (RSC)
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