Ti3C2Tx/PANI/Liquid Metal Composite Microspheres with 3D Nanoflower Structure: Preparation, Characterization, and Applications in EMI Shielding

Abstract Conductive fabrics are promising candidates for developing flexible, lightweight, and high conductivity electromagnetic (EM) shielding materials to meet the requirements of next‐generation flexible and wearable electronics. Herein, an effective strategy to construct a conductive titanium carbide (Ti 3 C 2 T x )/Polyaniline (PANI) composite with 3D nanoflower structure by deposition of PANI on the surface of single‐layer Ti 3 C 2 T x nanosheets through in situ and oxidant‐free polymerization of aniline monomer to avoid the restacking/aggregation and easy oxidation of Ti 3 C 2 T x MXene is developed. In addition, GaIn liquid metal (LM) nanoparticles are also incorporated into the Ti 3 C 2 T x /PANI microsphere to increase conductivity and stability. This method solves the existing problems of poor connectivity between LM nanoparticles and discontinuity of the Ti 3 C 2 T x MXene nanosheets. Eventually, by using carbon fabrics (CF) as the substrate, a flexible, stable, and efficient electromagnetic interference (EMI) shielding conductive composite fabric with an optimal EMI shielding efficiency (EMI SE) value of 52.0 dB in the range of 8.2–12.4 GHz at a thickness of 0.27 mm is developed. Meanwhile, the as‐prepared fabrics demonstrate superior Joule heating property, high mechanical flexibility, and excellent bending‐release stability. The study provides a simple and efficient method to fabricate multifunctional conductive textiles to meet the need for practical application in EMI shielding area.