Ti₃C₂T_x and Mo₂TiC₂T_x MXenes as additives in synovial fluids 

towards an enhanced biotribological performance of 3D-printed implants

verfasst von

Max Marian, Cotty D.Quiroz Esteban, Dario F. Zambrano, Sangharatna M. Ramteke, Jorge Ramos Grez, Brian C. Wyatt, Jacob Patenaude, Bethany G. Wright, Babak Anasori, Andreas Rosenkranz

Abstract

Synovial joints, critical for limb biomechanics, rely on sophisticated lubrication systems to minimize wear. Disruptions, whether from injury or disease, often necessitate joint replacements. While additive manufacturing offers personalized implants, ensuring wear resistance remains a challenge. This study delves into the potential of Ti₃C₂T_x and Mo₂TiC₂T_x nanosheets in mitigating wear of additively manufactured cobalt-chromium tungsten alloy substrates when incorporated as additives into synovial fluid. The colloidal solutions demonstrate an excellent stability, a crucial factor for reproducible assays and potential clinical applicability. Analysis of contact angles and surface tensions reveals MXene-induced alterations in substrate wettability, while maintaining their general hydrophilic character. Viscosity analysis indicates that MXene addition reduces the dynamic viscosity, particularly at higher concentrations above 5 mg/mL, thus enhancing dispersion and lubrication properties. Friction and wear tests demonstrate a dependency on the MXene concentration, while Ti₃C₂T_x exhibits stable friction coefficients and up to 77 % wear reduction at 5 mg/mL, which was attributed to the formation of a wear-protecting tribo-film (amorphous carbon and MXene nano-sheets). Our findings suggest that Ti₃C₂T_x, when supplied in favorable concentrations, holds promise for reducing wear in biotribological applications, offering avenues for future research into optimizing MXene utilization in load-bearing joint replacements and other biomedical devices.

Organisationseinheit(en)

Institut für Maschinenkonstruktion und Tribologie

Externe Organisation(en)

Pontificia Universidad Catolica de Chile
Universidad de Chile
Purdue University
Agencia Nacional de Investigación y Desarrollo (ANID)

Typ

Artikel

Journal

Applied Materials Today

Band

41

Anzahl der Seiten

11

ISSN

2352-9407

Publikationsdatum

12.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Materialwissenschaften

Elektronische Version(en)

https://doi.org/10.1016/j.apmt.2024.102464 (Zugang: Offen)