Multifunctional MXene: Improve electromagnetic interference shielding of PPy/PDA/Ti3C2Tx composites in X- and Ku-band

With the development of technology, life is full of electromagnetic pollution; therefore we need to shield the electromagnetic signals that are undesirable and harmful to us. In this work, polypyrrole (PPy)/polydopamine (PDA)/Ti3C2Tx composites were successfully prepared for electromagnetic interference shielding applications by a simple polymerization method and mixing process. We investigated the electrical conductivity, thermal properties, electromagnetic interference shielding effect (EMI SE), and its EMI attenuation mechanism of PPy/PDA/Ti3C2Tx composites. By adjusting the content of Ti3C2Tx in the PPy/PDA/Ti3C2Tx composites (from 0 to 12 vol%), the conductivity of the composites increased considerably from 34.6 to 884.1 S m(-1), and the maximum EMI SE of the composites in K-u-band varied accordingly from 4.30 to 21.82 dB. Additionally, the thermal stability of the PPy/PDA/Ti3C2Tx (12 vol%) composite was improved due to the addition of Ti3C2Tx and PDA, with a change in mass loss from 59.25% to 29.34% at 900 degrees C. These results highlight that the investigated PPy/PDA/Ti3C2Tx composites are promising materials for EMI shielding.

Automated summary

With the development of technology, electromagnetic pollution has become a problem in our daily lives. In this study, a new type of electromagnetic interference shielding material was successfully prepared. By adjusting the composition of the composite material, the conductivity and shielding effect can be improved, while the thermal stability is also enhanced. This material shows great potential for practical applications.