A Simple Preparation of HDA-CuS Nanoparticles and Their Tribological Properties as a Water-Based Lubrication Additive
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In this paper, water-soluble CuS nanoparticles as water-based lubricant additives were synthesized by a simple surface modification method. Bis (2-hydroxyethyl) dithiocarbamic acid (HDA) was used as a modifier to ensure water solubility of nanoparticles, also acted as a reactant to offer sulfur source in this synthesis reaction of CuS. The tribological properties and thermal conductivity of as-prepared CuS nanoparticles modified by HDA (HDA-CuS) in distilled water were studied using UMT-2 micro friction tester and thermal conductivity meter. The results show that the as-prepared HDA-CuS nanoparticles can effectively improve the tribological behaviors and coefficient of thermal conductivity of distilled water. When the additive concentration is 0.8 wt%, the friction coefficient and wear rate are reduced by 78.3% and 93.7%, respectively, and the coefficient of thermal conductivity can be increased by 3%. The three-dimensional surface profiler, scanning electron microscope, and X-ray photoelectron spectroscopy were used to analyze the worn surface. It was found that a complex lubricating film was generated on the surface of the friction pairs during the friction process.
KeywordsCuS nanoparticles Water-based lubricant additive Tribological properties Heat transfer performance
The authors acknowledge the financial support provided by National Natural Science Foundation of China (Grant Nos. 51775168, 21671053, and 51875172), scientific and technological innovation team of Henan Province University (Grant No. 19IRTSTHN024).
- 33.Xie, Y., Carbone, L., Nobile, C., Grillo, V., D′Agostino, S., Della Sala, F., Giannini, C., Altamura, D., Oelsner, C., Kryschi, C., Cozzoli, P.D.: Metallic-like stoichiometric copper sulfide nanocrystals: phase- and shape-selective synthesis, near-infrared surface plasmon resonance properties, and their modeling. ACS Nano 7, 7352–7369 (2013)CrossRefGoogle Scholar
- 34.Tang, Z., Im, S.H., Kim, W.S., Yu, T.: Facile aqueous-phase synthesis of copper sulfide nanofibers. J. Cryst. Growth 469, 172–175 (2017)Google Scholar