Few-layered Ti3C2Tx MXene was fabricated by ionic intercalation and sonication-assisted method, followed by

thermal reduction at medium-low temperature. Then annealed Ti3C2Tx/epoxy electromagnetic interference

(EMI) shielding nanocomposites were obtained by solution casting method. XRD, SEM, AFM and TEM indicated

the successful preparation of few-layered Ti3C2Tx. FTIR, XPS and XRD showed that thermal reduction removed

partial polar groups on the surface of Ti3C2Tx with no by-product. For a fixed Ti3C2Tx loading, compared with

Ti3C2Tx/epoxy EMI shielding nanocomposites, the annealed Ti3C2Tx/epoxy EMI shielding nanocomposites

exhibited relatively higher electrical conductivity and excellent EMI shielding effectiveness (SE). When the mass

fraction of annealed Ti3C2Tx was 15 wt%, the annealed Ti3C2Tx/epoxy EMI shielding nanocomposites presented

the optimal electrical conductivity of 105 S/m and EMI SE of 41 dB, 176% and 37% higher than that of 15 wt%

Ti3C2Tx/epoxy EMI shielding nanocomposites. Furthermore, the 5 wt% annealed Ti3C2Tx/epoxy EMI shielding

nanocomposites exhibited the optimal Young’s modulus of 4.32 GPa and hardness of 0.29 GPa, respectively.