Annealing Ti 3 C 2 T z MXenes to Control Surface Chemistry and Friction.

Autor: Arole K; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States.; Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States., Micci-Barreca SA; Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States., Athavale S; Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States., Tajedini M; J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas 778843, United States., Raghuvaran G; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States., Lutkenhaus JL; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States.; Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States., Radovic M; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States., Liang H; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States.; J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University, College Station, Texas 778843, United States., Green MJ; Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States.; Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2024 Feb 07; Vol. 16 (5), pp. 6290-6300. Date of Electronic Publication: 2024 Jan 24.
DOI: 10.1021/acsami.3c18232
Abstrakt: Although surface terminations (such as ═O, -Cl, -F, and -OH) on MXene nanosheets strongly influence their functional properties, synthesis of MXenes with desired types and distribution of those terminations is still challenging. Here, it is demonstrated that thermal annealing helps in removing much of the terminal groups of molten salt-etched multilayered (ML) Ti 3 C 2 T z . In this study, the chloride terminations of molten salt-etched ML-Ti 3 C 2 T z were removed via thermal annealing at increased temperatures under an inert (argon) atmosphere. This thermal annealing created some bare sites available for further functionalization of Ti 3 C 2 T z . XRD, EDS, and XPS measurements confirm the removal of much of the terminal groups of ML-Ti 3 C 2 T z . Here, the annealed ML-Ti 3 C 2 T z was refunctionalized by -OH groups and 3-aminopropyl triethoxysilane (APTES), which was confirmed by FTIR. The -OH and APTES surface-modified ML-Ti 3 C 2 T z are evaluated as a solid lubricant, exhibiting ∼70.1 and 66.7% reduction in friction compared to a steel substrate, respectively. This enhanced performance is attributed to the improved interaction or adhesion of functionalized ML-Ti 3 C 2 T z with the substrate material. This approach allows for the effective surface modification of MXenes and control of their functional properties.
Databáze: MEDLINE