Characterization and tribological properties of rice husk carbon nanoparticles Co-doped with sulfur and nitrogen

Autor: Karl Dearn David, Kunhong Hu, Guo Jianhua, Cai Weimeng, Qian Wenli, Enzhu Hu, Xianguo Hu, Tu Zhiqiang, Zhang Hao, Wei Yang, Wang Bangbang
Rok vydání: 2018
Předmět:
Zdroj: Applied Surface Science. 462:944-954
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2018.08.165
Popis: A novel carbon nanoparticle co-doped with sulfur and nitrogen (S, N CN) was prepared from rice husk powder through a hydrothermal reaction. A series of modern analysis techniques was utilized to characterize the morphology, structure, and components of the S, N CN nanoparticles. Their tribological properties as a lubricating additive to polyethylene glycol (PEG200) base oil were investigated using a UMT-2 sliding tribometer. Results showed that the average diameter of nanoparticles were approximately 16 nm. The nanoparticles mainly included C, O, N, and S. The ID/IG value of S, N CN was 2.63. PEG200 that included different contents of S, N CN displayed remarkable lubricating performance compared with pure PEG200 under different loads (8, 20, 40, and 100 N). When 0.1 wt% S, N CN was dispersed in base oil, the friction coefficient and wear rate decreased by 16.6% and 75.9%, respectively. The friction and wear mechanisms were attributed to robust tribo-films that had developed as a result of tribo-chemical reactions induced by the S, N CN particles, comprising nitrides, sulfides, and metal oxides to promote wear resistance and friction reduction properties of PEG200.
Databáze: OpenAIRE