MXene represents new kinds of two-dimensional material transition metal carbides and/or carbonitrides, which have attracted much attention in various applications including electrochemical storage devices, catalysts, and polymer composite. Here, we report a facile method to synthesize Ti₃C₂T_x MXene nanosheets and prepare a novel electrically conductive adhesive based on epoxy resin filled with Ti₃C₂T_x MXene nanosheets by solution blending. The structure, morphology, and performance of Ti₃C₂Tx MXene nanosheets and epoxy/Ti₃C₂T_x MXene nanosheets composite were investigated. The results show that Ti₃C₂T_x MXene possesses nanosheet structure. Ti₃C₂T_x MXene nanosheets were homogeneously dispersed in epoxy resin. Electrical conductivity and mechanical properties measurements reveal that the epoxy/Ti₃C₂T_x MXene nanosheet composite exhibited both good electrical conductivity (4.52 × 10⁻⁴ S/m) and favorable mechanical properties (tensile strength of 66.2 MPa and impact strength of 24.2 kJ/m²) when the content of Ti₃C₂T_x MXene nanosheets is 1.2 wt %. Thus, Ti₃C₂T_x MXene is a promising filler for electrically conductive adhesive with high electric conductivity and high mechanical performance.

Modified aluminum nitride particle/polystyrene (AlN/PS) composite was prepared by a powder processing technique. The thermal conductivities, dielectric and thermal properties of composites with different mass fraction of modified AlN were investigated. Compared to the pure PS, the thermally conductive properties of AlN/PS composites improved from 0.189 W (m⁻¹ K⁻¹) to 0.418 W (m⁻¹ K⁻¹) when the content of AlN was 25 wt%. The thermal stability of the AlN/PS composite was improved with the increasing addition of AlN. The dielectric constant and dielectric loss of the 25 wt% AlN/PS composite was 3.58 and 0.0036 at 10⁶ Hz, respectively. The dielectric constant of the AlN/PS composite showed a very small variation with the range of the frequency from 10² Hz to 10⁶ Hz. The tensile strengths of the AlN/PS composite increased with increasing filler content when it was no more than 5 wt%, and then decreased with the further increase of the filler content, whereas the elongations at break showed the similar trends. SEM analysis showed that AlN could pack tightly, and thermally conductive AlN–AlN channels could be generated with further addition of AlN. The thermal conductivity of the AlN/PS composite with the increase of AlN content tended to be higher at higher temperatures. The thermal conductivity of the AlN/PS composites at the same AlN content tended to be higher at higher temperatures. Several theoretical models were used in comparison with experimental data of the thermal conduction of the composites.

A simple template-free hydrothermal method has been developed to prepare multi-shelled SnO₂ hollow spheres with controlled interior texture.