A novel preparation method for MoS2 nanosheets with good tribology performance by the combination of expansion and freeze exfoliation. Issue 2 (1st February 2019)

• Record Type: Journal Article
• Authors: Wu, Pei-Rong; Zhang, Wei; Liu, Zan; Cheng, Zhi-Lin
• Is Part Of: Ceramics international. Volume 45:Issue 2(2019)Part A
• Page Start: 1730
• Page End: 1736
• Publication Date: 2019-02-01
• Subjects: MoS2 nanosheets -- Expansion -- Freeze -- Exfoliation -- Tribological properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.10.055
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Two-dimensional MoS2 nanosheets were exfoliated by the combination of high temperature expansion exfoliation (MoS2 -OA) and low temperature freeze exfoliation (MoS2 -OA-N2 ). The samples were verified by XRD, Raman, UV–vis, FT-IR, SEM, TEM, HRTEM and AFM. The results indicated that the MoS2 -OA-N2 nanosheets with 5–7 layers were small size, few layers and thin thickness. The formation mechanism of the MoS2 -OA-N2 nanosheets was proposed. Furthermore, the lubrication performances of the MoS2 -OA-N2 nanosheets in base oil were tested on the four-ball wear machine. The average friction coefficient (COF) and average wear scar diameter (AWSD) of 0.08 wt% MoS2 -OA-N2 -based oil were about 26.46% and 44.55% lower than those of the base oil. The results exhibited that the MoS2 -OA-N2 showed the excellent tribological properties.