Self-dispersed crumpled graphene balls in oil for friction and wear reduction
Abstract
Aggregation is a major problem for ultrafine particle additives in lubricant oil because it reduces the effective particle concentrations, prevents particles from entering the contact area of working surfaces, and leads to unstable tribological performance. Molecular ligands can help the particles to disperse, but they tend to degrade under the harsh tribological conditions. Therefore, self-dispersed particles without the need for surfactant are highly desirable. We report here, for the first time to our knowledge, such type of ultrafine particles made of crumpled, paper-ball–like graphene, which indeed can self-disperse in lubricant oil, and exhibit stable and superior tribological performances.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 25, 2016
- Source ID
- 10.1073/pnas.1520994113
Entities
People
- Andrew R. Koltonow
- Hee Dong Jang
- Jiaxing Huang
- Qian Wang
- Xingliang He
- Xuan Dou
- Yip-wah Chung
Organizations
- Northwestern University
- Office of Naval Research