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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
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Garlic Oil-Functionalized Covalent Organic Frameworks as Efficient Lubricant Additives for Synergistically Improved
Yongming Yuan1, Xiaozhi Zhang1,2, Shenghua Xue1
1Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|December 19, 2025
Summary
A novel garlic oil-functionalized covalent organic framework (GO@COF-F) significantly improves lubricant performance. This advanced nanoadditive reduces friction and wear by forming a protective tribofilm, enhancing lubrication efficiency.
Area of Science:
- Materials Science
- Tribology
- Nanotechnology
Background:
- Covalent organic frameworks (COFs) offer tunable properties for various applications.
- Fluorinated COFs present unique characteristics for advanced material design.
- Lubrication additives are crucial for reducing friction and wear in mechanical systems.
Purpose of the Study:
- To synthesize and characterize garlic oil-functionalized COF-F (GO@COF-F) as a lubricant additive.
- To evaluate the tribological performance enhancement of GO@COF-F in a base oil.
- To elucidate the mechanism behind the improved lubrication properties.
Main Methods:
- Solvothermal synthesis of amine-terminated COF-F.
- Surface functionalization of COF-F with garlic oil (GO) via ball milling and aza-Michael reaction.
- Tribological testing of GO@COF-F in PAO10 base oil using standard friction and wear measurements.
Main Results:
- Successful synthesis of GO@COF-F nanoadditive.
- Incorporation of 1.00 wt % GO@COF-F reduced the friction coefficient from 0.18 to 0.101.
- Wear volume decreased significantly from 1.0 × 10^6 to 1.6 × 10^5 μm^3.
- Formation of a protective tribofilm and promotion of rolling friction were observed.
Conclusions:
- GO@COF-F acts as an effective anti-wear and friction-reducing additive.
- The enhanced lubrication is attributed to the mending effect and tribofilm formation.
- This functionalized COF shows great potential for advanced lubrication applications.
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