The effect of two-dimensional d-Ti3C2 on the mechanical and thermal conductivity properties of thermoplastic polyurethane composites

摘要

In this study, Ti3C2 was delaminated into monolayer or few-layer d-Ti3C2 nanosheets, followed by preparation of d-Ti3C2/thermoplastic polyurethane (TPU) composites. The products were characterized by X-ray diffraction and field emission scanning electron microscopy. The effects of d-Ti3C2 loading on the thermal and mechanical properties of the composites were investigated and the fracture morphology was analyzed. Results showed that the prepared d-Ti3C2 was a monolayer or few-layer nanosheets and the monolayer thickness is about 1.2 nm. The two-dimensional d-Ti3C2 was uniformly dispersed in the TPU matrix. The addition of d-Ti3C2 nanosheets increased the thermal conductivity of TPU and also improved the mechanical properties of the matrix. When d-Ti3C2 loading was 1 wt%, the specific strength and specific elongation were improved by about 29% and 53%, meanwhile the dissipated energies increased by 0.3 kJ/m(3).