Effective usage of 2D MXene nanosheets as solid lubricant – Influence of contact pressure and relative humidity

Marian, Max; Song, Gui Cheng; Wang, Bo; Fuenzalida, V.M.; Krauß, Sebastian; Merle, Benoit; Tremmel, Stephan; Wartzack, Sandro; Yu, Jinhong; Rosenkranz, Andreas

doi:10.1016/j.apsusc.2020.147311

Cited by 102 publications

(46 citation statements)

References 72 publications

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“…A 3.2-fold reduction of the frictional torque and a 2.1-fold extension of the service life interval thus reaching 750 000 revolutions were achieved while keeping the frictional torque sufficiently low to ensure proper functioning. [118] Figure 4e highlights the excellent performance of MXenes' solid lubricant coatings with COFs of about 0.2 and wear rates on the order of 10 -7 mm 3 N −1 m −1 , which is comparable to the behavior of the other 2D nanomaterials. Considering the early stage of tribological research on MXenes, it can be envisioned that MXenes can induce even more beneficial effects thus making them the next-generation solid lubricant systems.…”

Section: Tribological Behavior Of Mxenesmentioning

confidence: 61%

“…[116] Recently, the friction and wear response of drop-cast MXene coatings were studied as functions of relative humidity and contact pressure. [117] For high contact pressures of 0.80 GPa and low relative humidity of 20%, MXene coatings induced a 2.3-fold friction reduction and a 2.7-fold wear volume reduction due to the formation of self-lubricating tribofilms of compacted MXenes. Inspired by these encouraging results, 3-µm-thick drop-cast MXene coatings were tested in higher loaded thrust ball bearings under applied axial loads of 130 N, a contact pressure of 0.8 GPa, and 1000 RPM.…”

Section: Tribological Behavior Of Mxenesmentioning

confidence: 94%

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2D MXenes: Tunable Mechanical and Tribological Properties

2021

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carbon/nitrogen (X) with bonded terminations (T x : -O 2 , -F 2 , -(OH) 2 , -Cl 2 , or their combinations) on the exterior transition metal surfaces. [6][7][8] MXenes' crystal structures and chemical formula are derived from their 3D crystalline precursors, which are usually MAX phases. [9] MAX phases are chemically denoted by M n+1 AX n (n = 1 to 4), for which the M-X layers found in MXenes are sandwiched by layers of A-group elements (mostly group 13-16 of the periodic table). [10] MXenes are synthesized by selectively removing/ etching these A-group element layers. Upon the removal of these A layers, surface terminations (T x ) occupy the bonding sites on M layers previously bonded to the A-group elements. [11] MXenes are excellent candidates for a range of applications (Figure 1a), including energy storage, [7] transparent electronics, [12,13] sensors, [14] electromagnetic interference (EMI) shielding, [15,16] and catalysis. [17] These applications involve MXenes as flexible and thin films, [13] MXenes as anchors in hybrid materials, [18] embedded in matrix materials, [19,20] or even as wearable fabrics. [21] In almost all these applications, fundamental understanding of the mechanical and tribological properties of MXenes is necessary (Figure 1b). The mechanical properties are vital to MXenes' applications in energy storage and catalysis, as MXenes in electrodes can act as active materials, conductive additives, strong binders, and current collectors, which can control the structure of the electrode and withstand expansion and contraction during charge and discharge cycles. [7,22] Additionally, the rise of flexible and wearable devices [13,21,23] necessitates mechanical characterization of MXene to withstand the required mechanical forces while maintaining the flexibility for these applications. Similarly, the potential applications of MXenes in triboelectric nanogenerators for energy storage and wearable electronics requires the characterization of MXenes' tribological properties. [24] More recently, MXenes have been used as reinforcement phases in composite materials. [25] The relevance of the mechanical and tribological properties in various applications is illustrated in Figure 1b. The rationale and support for this figure is summarized in Figures S1 and S2, Supporting Information, and discussed further in the Supporting Information.Despite well over 3000 publications to date on MXenes since their discovery, [26] only 4.9% of publications have studied their mechanical and tribological properties and their applications as reinforcement materials in composites, as shown in Figure 1a. Only two experimental studies on the mechanical stiffness 2D transition metal carbides, nitrides, and carbonitrides, known as MXenes, were discovered in 2011 and have grown to prominence in energy storage, catalysis, electromagnetic interference shielding, wireless communications, electronic, sensors, and environmental and biomedical applications. In addition to their high electrical conductivity and electrochemically activ...

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Section: Tribological Behavior Of Mxenesmentioning

confidence: 61%

Section: Tribological Behavior Of Mxenesmentioning

confidence: 94%

2D MXenes: Tunable Mechanical and Tribological Properties

2021

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“…Newly emerging MXenes, [ 58c ] such as Ti 3 C 2 T x ‐nanosheets, have shown ultra‐high wear resistance and good lubrication behavior under dry conditions resulted from their graphite‐like structure with low shear strength. [ 63 ] A 2.3‐fold reduction in friction and a 2.7‐fold reduction in wear have been observed in the Ti 3 C 2 T x ‐nanosheet modified steel surface compared with the bare steel under a contact pressure of 0.8 GPa and at relative‐low humidity. Ti 3 C 2 T x ‐nanosheets show excellent anti‐friction and anti‐wear properties at moderate contact stress and low humidity conditions.…”

Section: Design Strategies Of Wear‐resistant Materialsmentioning

confidence: 99%

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

et al. 2021

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There has been tremendous interest in the development of different innovative wear‐resistant materials, which can help to reduce energy losses resulted from friction and wear by ≈40% over the next 10–15 years. This paper provides a comprehensive review of the recent progress on designs, properties, and applications of wear‐resistant materials, starting with an introduction of various advanced technologies for the fabrication of wear‐resistant materials and anti‐wear structures with their wear mechanisms. Typical strategies of surface engineering and matrix strengthening for the development of wear‐resistant materials are then analyzed, focusing on the development of coatings, surface texturing, surface hardening, architecture, and the exploration of matrix compositions, microstructures, and reinforcements. Afterward, the relationship between the wear resistance of a material and its intrinsic properties including hardness, stiffness, strength, and cyclic plasticity is discussed with underlying mechanisms, such as the lattice distortion effect, bonding strength effect, grain size effect, precipitation effect, grain boundary effect, dislocation or twinning effect. A wide range of fundamental applications, specifically in aerospace components, automobile parts, wind turbines, micro‐/nano‐electromechanical systems, atomic force microscopes, and biomedical devices are highlighted. This review is concluded with prospects on challenges and future directions in this critical field.

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“…It has wide application in energy storage, photocatalysis, biomedicine, and other fields . Ti 3 C 2 T x and its composite materials as lubricating materials have attracted wide interest due to the potential advantages in solid lubricants, , lubricating coatings, water-based lubricants additives, and oil-based lubricating additives . Fan et al described the preparation of a Ti 3 C 2 /graphene hybrid with a wrapping structure, which was added as a filler into epoxy coating; the as-prepared hybrid compound exhibited good wear resistance due to the synergistic effect of Ti 3 C 2 and graphene .…”

Section: Introductionmentioning

confidence: 99%

Dialkyl Dithiophosphate-Functionalized Ti₃C₂T_x MXene Nanosheets as Effective Lubricant Additives for Antiwear and Friction Reduction

Gao

Zhang

et al. 2021

ACS Appl. Nano Mater.

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Surface modification can be used as an effective tool for designing functionalized 2D nanomaterial-based lubricant additives with desirable properties. In this paper, Ti 3 C 2 T x -based nanoadditives are prepared via surface modification with a tannic acid (TA)−Fe 3+ complex and then by introducing commercial lubricating additive dialkyl dithiophosphate (DDP) via Michael addition. TA and FeCl 3 solutions are used to form a TA−metal complex as the adhesion layer to anchor Ti 3 C 2 T x nanosheets and then modification with a commercial lubricating additive DDP molecule via Michael addition, resulting in the formation of DDPfunctionalized MXene nanosheets (DDP-Ti 3 C 2 T x ). The experimental results show that the dispersive stability of the as-prepared DDP-Ti 3 C 2 T x in 500SN base oil is greatly improved for more than 1 week. Furthermore, the tribological properties of the DDP-Ti 3 C 2 T x nanosheet additive are evaluated. The results show that the asprepared DDP-Ti 3 C 2 T x exhibits significant anti-wear and friction reduction abilities with a low coefficient of friction not exceeding 0.11, reduction in the corresponding wear volume by about 87%, and a high load-carrying capacity up to 500 N as a lubricating additive. The tribological properties may be attributable to the good dispersion and the shape of the small sheet, which ensure their entry into the contact area of the friction pair and the formation of a continuous chemical protective film that prevents direct contact and seizure.

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Effective usage of 2D MXene nanosheets as solid lubricant – Influence of contact pressure and relative humidity

Cited by 102 publications

References 72 publications

2D MXenes: Tunable Mechanical and Tribological Properties

2D MXenes: Tunable Mechanical and Tribological Properties

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

Dialkyl Dithiophosphate-Functionalized Ti₃C₂T_x MXene Nanosheets as Effective Lubricant Additives for Antiwear and Friction Reduction

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Effective usage of 2D MXene nanosheets as solid lubricant – Influence of contact pressure and relative humidity

Cited by 102 publications

References 72 publications

2D MXenes: Tunable Mechanical and Tribological Properties

2D MXenes: Tunable Mechanical and Tribological Properties

Recent Progress on Wear‐Resistant Materials: Designs, Properties, and Applications

Dialkyl Dithiophosphate-Functionalized Ti3C2Tx MXene Nanosheets as Effective Lubricant Additives for Antiwear and Friction Reduction

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Product

Resources

About

Dialkyl Dithiophosphate-Functionalized Ti₃C₂T_x MXene Nanosheets as Effective Lubricant Additives for Antiwear and Friction Reduction