Abstract
In-situ synthesis, dispersivity and dispersion stability and tribological properties of ultra-dispersity-stability CuS nanoparticles were studied. The oil-soluble copper salts and hyper-dispersion stabilizer were successfully synthesized. The CuS nanoparticles (n-CuS) were synthesized in-situ in liquid paraffin containing oil-soluble copper salt and hyper-dispersion stabilizer. The diameter, diameter distribution and conglomeration behavior of n-CuS in dispersion were observed by freeze-etching replication transmission electron microscopy technique. The tests of centrifuge and high speed centrifuge were used for evaluating the dispersion stability of n-CuS. The tribological properties of the lubricants with and without n-CuS were investigated by block-on-ring tribo-test, respectively. The results show that n-CuS are ellipsoid-shaped with size of about 35 nm. Nano-dispersion has a single-particle-dispersion properties, and don't come into delamination through 72 h centrifuge test and 56 h intermittent high speed centrifuge test. The friction-reduction and antiwear ability of liquid paraffin are effectively enhanced when n-CuS are added, and the best when the content of n-CuS of 0.1%.
| Original language | English |
|---|---|
| Pages (from-to) | 257-261 |
| Number of pages | 5 |
| Journal | Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology |
| Volume | 36 |
| Issue number | 2 |
| State | Published - Mar 2007 |
| Externally published | Yes |
Keywords
- CuS nanoparticles
- In-site synthesis
- Tribological behavior
- Ultra-dispersity-stability