Novel design of MXene@UiO-66-NH2 hybrid nanofluids towards promoting the mechanical and tribological performance of fabric composites

The operational stability of self-lubricating fabric liners under harsh conditions faced serious challenge, and then the abrasion resistance and lubricating properties of fabric liners required further improvement urgently. Herein, the UiO-66-NH2 nanoparticles were uniformly anchored onto MXene nanosheets via electrostatic assembly to construct the 0D-2D hierarchical hybrid. Subsequently, the MXene@UiO-66-NH2 hybrids were further func-tionalized by grafting KH560 corona and M2070 canopy via covalent reaction to form MXene@UiO-66-NH2 nanofluids (NFs) with liquid-behavior. As a result, the friction and wear of PI/PTFE fabric composites presented an effective reduction with the introduction of MXene@UiO-66-NH2 NFs. In particular, significant synergistic effect between MXene and UiO-66-NH2 was recognized during sliding process, and comprehensive characterizations indicated that the MXene@UiO-66-NH2 NFs improved lubrication performance, load-bearing capacity and contributed to forming a robust tribofilm. Meanwhile, the innovative ionic shell structures endowed the MXene@UiO-66-NH2 NFs with outstanding dispersion stability in resin matrix and then maximized the enhancement effects.

Automated summary

In this study, MXene@UiO-66-NH2 nanofluids were synthesized by anchoring UiO-66-NH2 nanoparticles onto MXene nanosheets, followed by further functionalization. The introduction of MXene@UiO-66-NH2 nanofluids effectively reduced the friction and wear of fabric composites.