1. Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
3. School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China
4. University of Chinese Academy of Sciences, Beijing 100039, China
5. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China