BLG-RGO: A novel nanoadditive for water-based lubricant. (July 2019)

• Record Type: Journal Article
• Authors: Hu, Yiwen; Wang, Yongxin; Zeng, Zhixiang; Zhao, Haichao; Li, Jinlong; Ge, Xuewu; Wang, Liping; Xue, Qunji; Mao, Chunlong; Chen, Shanjun
• Is Part Of: Tribology international. Volume 135(2019)
• Page Start: 277
• Page End: 286
• Publication Date: 2019-07
• Subjects: Reduced graphene oxide -- β-lactoglobulin -- Water dispersibility -- Water-based lubricant; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2019.03.008
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: Attractive tribological performance made graphene(G)-based material great potential to be used as an effective nanoadditive in water-based lubricant. Herein, this paper put forward a facile, simple and environment-friendly method to modify the reduced graphene oxide (RGO) by β-lactoglobulin (BLG) noncovalently, accompanied with an in-depth investigation on the lubricating properties of BLG-RGO in water solution. The results indicated that the RGO decorated with BLG could stably disperse in water for a long time (>8 months) and exhibit excellent friction-reducing (∼37%) and anti-wear (∼45%) property. The outcome of this research implying that the BLG-RGO as potential green nanoadditives in water-based lubricant and thus may help in practical application by industry. Highlights: The reduced graphene oxide modified by β-lactoglobulin can be dispersed in water stably. The BLG-RGO as an additive overcomes the shortcomings of poor lubrication performance of water-based lubricant. The lamellar structure of BLG-RGO and the formation of tribo-film are reasons for improvement in friction performance.