Enhancing the tribological performance of Ti3C2 MXene modified with tetradecylphosphonic acid

Feng, Qing; Deng, Fukang; Li, Kangchun; Dou, Mingyuan; Zou, Shuai; Huang, Fuchuan

doi:10.1016/j.colsurfa.2021.126903

Cited by 38 publications

(21 citation statements)

References 38 publications

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“…[10,11,60,61] In the past five years, MXenes have been used as additives to reduce friction and wear under lubricated conditions. In this regard, ml- [62][63][64] or d-Ti 3 C 2 T x [65,66] have been mixed with nonadditivated 100SN, [62] poly-(alpha)-olefin, [63] paraffin, [64] and castor base oil. [65] Hybrid TiO 2 -and potassium titanate-Ti 3 C 2 T x composites have also been utilized as additives in base oils.…”

Section: Mxenes For Liquid Lubricationmentioning

confidence: 99%

“…For instance, Feng et al grafted tetradecylphosphonic acid onto ml-Ti 3 C 2 T x (Figure 3a), which notably improved its dispersion in castor oil and led to a 30% reduction in friction and a 55% reduction in the wear rate (Figure 3b). [65] Recently, dialkyl dithiophosphate moieties were grafted onto tannic acid-Fe 3+ complex precoated Ti 3 C 2 T x flakes. [76] This approach improved MXene dispersion in the base oils leading to a stable coefficient of friction (CoF) of 0.11, an 87% wear volume reduction, and a loadbearing capacity reaching 500 N. Guo et al verified that poly[2-(perfluorooctyl)ethyl methacrylate)] (PPFMA)-grafted Ti 3 C 2 T x (Figure 3c) showed an improved dispersibility in perfluoropolyether (PFPE) and, therefore, improved friction and wear performance (Figure 3d).…”

Section: Mxenes For Liquid Lubricationmentioning

confidence: 99%

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Perspectives of 2D MXene Tribology

et al. 2022

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efficiency, the significance of tribology becomes evident in light of global challenges such as decreasing earth resources, i.e., fossil fuel and minerals, as well as steadily rising CO 2 emissions contributing to global warming. [4,5] In this context, friction and wear have been identified as notably contributing toward a downgraded energy efficiency, inviting the development of greener, smarter, and more sustainable tribological processes and lubricants.Since ancient times, the most straightforward approach to reduce friction and wear was to place a liquid lubricant (oil or grease) between the rubbing surfaces. This greatly reduces or eliminates the solid-solid contact, thus enabling low-friction and lowwear conditions. [6] However, after centuries of use, liquid lubricants have been pushed toward their limits due to the current trend of continuously reducing the lubricant viscosity and, therefore, the resulting film thickness. This, in turn, increases the amount of solid-solid contact, leading to harsher tribological conditions with increased friction and wear. Combined with more stringent regulations regarding the use of sulfur-and phosphorous-containing lubricant additives as well as efforts toward decarbonization to reduce CO 2 emissions and hazardous wastes, these factors propel the urgent development of alternative lubrication concepts. [4] In this context, nanomaterials used as additives in base oils or applied as solid lubricant coatings have gained notableThe large and rapidly growing family of 2D early transition metal carbides, nitrides, and carbonitrides (MXenes) raises significant interest in the materials science and chemistry of materials communities. Discovered a little more than a decade ago, MXenes have already demonstrated outstanding potential in various applications ranging from energy storage to biology and medicine. The past two years have witnessed increased experimental and theoretical efforts toward studying MXenes' mechanical and tribological properties when used as lubricant additives, reinforcement phases in composites, or solid lubricant coatings. Although research on the understanding of the friction and wear performance of MXenes under dry and lubricated conditions is still in its early stages, it has experienced rapid growth due to the excellent mechanical properties and chemical reactivities offered by MXenes that make them adaptable to being combined with other materials, thus boosting their tribological performance. In this perspective, the most promising results in the area of MXene tribology are summarized, future important problems to be pursued further are outlined, and methodological recommendations that could be useful for experts as well as newcomers to MXenes research, in particular, to the emerging area of MXene tribology, are provided.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202207757.

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Section: Mxenes For Liquid Lubricationmentioning

confidence: 99%

Section: Mxenes For Liquid Lubricationmentioning

confidence: 99%

Perspectives of 2D MXene Tribology

et al. 2022

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“…Moreover, MXenes have been used as lubricant additives in polar lubricants, including water, glycerol, or ionic liquids, due to their inherent hydrophilicity. 32,35,36 Based on this brief literature review, it becomes evident that most of the research activities related to the use of the assynthesized hydrophilic MXene nanosheets in hydrophobic base oils have focused on exploring the optimum MXene concentration. However, to the authors' knowledge, no systematic study is available that assesses the frictional properties of MXenes as lubricant additives in synthetic base oils over a broader range of testing conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The relatively limited success of MXene lubricant additives in pure base oils is related to their inherent hydrophilicity due to polar surface terminations, which limits their dispersion stability in hydrophobic base oils. Therefore, significant research efforts have been dedicated to MXenes’ surface functionalization to tailor their hydrophobicity. ,− Initial studies have already been published demonstrating the successful chemical functionalization and its effect on the resulting tribological performance under lubricated conditions. Moreover, MXenes have been used as lubricant additives in polar lubricants, including water, glycerol, or ionic liquids, due to their inherent hydrophilicity. ,, …”

Section: Introductionmentioning

confidence: 99%

Ti₃C₂T_x MXene Nanosheets as Lubricant Additives to Lower Friction under High Loads, Sliding Ratios, and Elevated Temperatures

Boidi

Queiróz

Profito

et al. 2022

ACS Appl. Nano Mater.

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Tribological studies using 2D nanomaterials have gained notable attention in the last decade owing to their outstanding friction and wear performance. Within this group, MXenes are an emerging class that has moved into the focus of tribological research due to their easy-to-shear ability, favorable mechanical properties, and ability to generate beneficial tribo-films. The present study aims at scrutinizing the tribological performance of multilayer Ti3C2T x MXene nanosheets when used as a lubricant additive in poly-(α)-olefin oil under non-conformal contact conditions. Ball-on-disc tests were carried out at varying speeds, temperatures, loads, slide-to-roll ratios, and MXene concentrations (0.5 and 3 wt %) to assess their performance over a broad range of experimental conditions. Our results demonstrate that multilayer Ti3C2T x MXenes (3 wt %) considerably reduced the coefficient of friction under most conditions considered. Particularly, under severe conditions (higher loads, sliding ratios, and elevated temperatures), which result in reduced film thicknesses and harsher contacts, MXenes showed a notable friction reduction of about 30%. Therefore, multilayer Ti3C2T x MXene nanosheets demonstrated excellent potential as lubricant additives for components that operate under severe and varying working conditions.

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“…As a typical two-dimensional (2D) material, MXene shows considerable potential for versatile applications owing to its various outstanding performances. − It has a general formula M n +1 X n T x ( n = 1∼4, x is the number of T per unit of M n +1 X n ) derived from MAX through the etching “A” element, where M represents an early transition metal, A indicates an element from group IIIA or IVA, X is carbon and/or nitrogen, and T refers to variable surface terminations (e.g., O, −OH, −F, −Cl). , Its numerous advantages, such as low shear resistance between adjacent layers, tunable structure, various surface terminations, and high mechanical strength, make it promising candidates as solid lubricants and lubricant additives. − The surface-functionalized MXene has better interfacial compatibility with base oils. However, it will inevitably settle at the bottom due to gravity.…”

Section: Introductionmentioning

confidence: 99%

Surface-Functionalized Ti₃C₂T_x MXene as a Kind of Efficient Lubricating Additive for Supramolecular Gel

Guo

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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Low interlaminar shear stress, high mechanical strength, and tunable structure make Ti3C2T x MXene a burgeoning star as solid lubricants and lubricant additives. Although surface modification strategy can improve its compatibility with base oils, it will eventually settle due to gravity. Additionally, base oils are prone to leakage, creep, and volatilization, which limit their application. To address these issues, supramolecular gels with surface-modified Ti3C2T x were conceived. Apart from the lubrication effect, the high thermal conductivity of Ti3C2T x MXene accelerated the phase transition rate of supramolecular gels. The thermal-reversible and creep-resistant properties distinguish them from other conventional lubricants. The tribological tests showed that the 500 solvent neutral (SN) supramolecular gel with 0.10 wt % Ti3C2T x -octadecylphosphonic acid (Ti3C2Tx-ODPA) reduced the coefficient of friction (COF) by 46.32% and wear volume by 81.18% compared with pure 500SN oil. Moreover, they also performed well in load-carrying capacity, temperature tolerance, and speed adaptability. This work puts forward a new approach to prepare MXene-based lubricants tailored for some severe lubrication conditions. These exceptional features enable their application in rolling bearings, some gears, and other low maintenance mechanisms.

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Enhancing the tribological performance of Ti3C2 MXene modified with tetradecylphosphonic acid

Cited by 38 publications

References 38 publications

Perspectives of 2D MXene Tribology

Perspectives of 2D MXene Tribology

Ti₃C₂T_x MXene Nanosheets as Lubricant Additives to Lower Friction under High Loads, Sliding Ratios, and Elevated Temperatures

Surface-Functionalized Ti₃C₂T_x MXene as a Kind of Efficient Lubricating Additive for Supramolecular Gel

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Enhancing the tribological performance of Ti3C2 MXene modified with tetradecylphosphonic acid

Cited by 38 publications

References 38 publications

Perspectives of 2D MXene Tribology

Perspectives of 2D MXene Tribology

Ti3C2Tx MXene Nanosheets as Lubricant Additives to Lower Friction under High Loads, Sliding Ratios, and Elevated Temperatures

Surface-Functionalized Ti3C2Tx MXene as a Kind of Efficient Lubricating Additive for Supramolecular Gel

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Product

Resources

About

Ti₃C₂T_x MXene Nanosheets as Lubricant Additives to Lower Friction under High Loads, Sliding Ratios, and Elevated Temperatures

Surface-Functionalized Ti₃C₂T_x MXene as a Kind of Efficient Lubricating Additive for Supramolecular Gel