Effect of hydroxyl intercalation on tribological properties of MXene (Ti3C2Tx). Issue 21 (1st November 2021)

• Record Type: Journal Article
• Authors: Tian, Pei; Yu, Guomin; Wei, Kongxia; Zhang, Zhenxi; Wang, Nong
• Is Part Of: Ceramics international. Volume 47:Issue 21(2021)
• Page Start: 30722
• Page End: 30728
• Publication Date: 2021-11-01
• Subjects: MXene -- Solid-liquid coating -- Friction coefficient -- Functional group; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.07.251
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: MXenes (Tin+1 Cn Tx ), a class of two-dimensional materials, have recently attracted the attention of many researchers in the field of lubrication owing to their low shear strength and self-lubrication ability. However, because of their weak adhesion, they fail quickly on metal surfaces. Ti- in an MXene can bond to functionalized –OH to form a Ti–OH terminal, which can enhance the binding force of MXene/metal interfaces. In this study, an MXene-ethylene glycol solid-liquid composite coating was designed. The ball-on-disc friction test results showed that the composite coating achieved a coefficient of friction of 0.165, which is 72.5% lower than that of the non-lubricated substrate. This is because the intercalation of hydroxyl groups in glycol allows MXene to better maintain its two-dimensional nanostructure. Moreover, the frictional performance of the composite coating under different loads was studied; the coefficient of friction further reduced to 0.147 at 8 N.