Mussel-Inspired Interfacial Modification for Ultra-Stable MoS₂ Lubricating Films with Improved Tribological Behavior...

Area of Science:

• Materials Science
• Tribology
• Nanotechnology

Background:

• Friction and wear cause significant energy loss and mechanical failure in industrial settings.
• Developing advanced lubricants is crucial for mitigating these issues and improving machinery lifespan.

Purpose of the Study:

• To synthesize and evaluate a novel solid lubricant composite for enhanced antifriction and anti-wear properties.
• To investigate the role of polydopamine (PDA) modification in improving lubricant performance under heavy loads.

Main Methods:

• Facile one-pot synthesis of ZnO/ZnO nanorods (NRs) and MoS2 films on glass substrates using aerosol-assisted chemical vapor deposition.
• Modification of ZnO/MoS2 nano-arrays with polydopamine (PDA) to create robust solid lubricants.
• Evaluation of adhesion, bearing strength, friction coefficient, and wear rate of the composite films.

Main Results:

• The ZnO/ZnO NRs/MoS2 composite exhibited improved bearing capacity and wear life due to nanorod lubricant retention.
• PDA modification resulted in ultra-stable solid lubricants with enhanced adhesion (11x) and bearing strength (30x).
• The composite showed a significant reduction in friction coefficient (94%) and wear rate (85%) compared to pristine MoS2.

Conclusions:

• PDA interface modification effectively enhances the compatibility, robustness, and adhesion of ZnO/MoS2 solid lubricants.
• The developed composite offers a convenient and effective method for antifriction and anti-wear applications in industry.
• The triple action of chemical chelation, layered materials, and nanotexture contributes to the lubricant's superior performance.