Sulfonated Graphene Grafted with Long Carbon Chains for Lubricant Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lubricating oils and greases face challenges with dispersion stability, particularly in complex environments, and fail to consistently meet industry standards for friction coefficients, leading to reduced performance and wear issues.
Innovation Solution
Incorporating sulfonated graphene grafted with long carbon chains into the lubricating oil or grease, which improves long-term dispersion stability and reduces friction coefficients by optimizing the mass ratio of carbon to sulfur and the number of carbon atoms in the chain, enhancing anti-wear and anti-friction properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid additives like graphite or molybdenum disulfide are introduced into lubricating oils to reduce friction and wear, then anti-wear and anti-friction performance is improved, but dispersion stability deteriorates over time especially in complex environments
Solution Approach 1:
The patent changes the chemical parameters of the solid additive by introducing sulfonated graphene with specific carbon-to-sulfur mass ratios (15-50) and long carbon chain lengths (10-50 carbon atoms). This chemical modification enables the additive to maintain both anti-wear performance and dispersion stability simultaneously, resolving the contradiction between improving reliability and maintaining compositional stability.
Solution Approach 2:
The patent creates a composite material structure by combining sulfonated graphene with long carbon chains. This composite approach integrates the lubricating properties of graphene with the dispersing properties of sulfonate groups and long carbon chains, achieving both anti-wear performance and dispersion stability that neither component could achieve alone.
2Reliability
If additives are uniformly dispersed in lubricating oil to improve comprehensive friction performance, then friction reduction is enhanced, but suspension stability deteriorates when placed for long time in complex environments
Solution Approach 1:
The patent optimizes the molecular structure parameters of the additive by controlling the carbon-to-sulfur mass ratio (15-50) and carbon chain length (10-50 atoms). These parameter changes create an additive that maintains uniform dispersion for friction performance while resisting aggregation over time, resolving the contradiction between friction performance and suspension stability.
3Reliability
If graphene is oxidized and vulcanized to improve dispersibility and anti-wear effect, then dispersion is enhanced, but long-term stability in synthetic oil deteriorates with absorbance decreasing by 50% or more after 100 hours
Solution Approach 1:
The patent changes the chemical composition parameters by introducing sulfonate groups and long carbon chains with specific ratios. This modification provides both the dispersibility needed for anti-wear effect and the structural stability required for long-term persistence in synthetic oil, preventing the absorbance degradation seen in previously vulcanized graphene.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves significant improvements in dispersion stability and friction reduction, meeting industry standards without compromising traction force, and demonstrates enhanced anti-wear properties by reducing wear on copper and iron surfaces.
Implementation Method 1
sulfonated graphene grafted with long carbon chains... improves long-term dispersion stability
Implementation Method 2
sulfonated graphene grafted with long carbon chains... stable dispersion
Implementation Method 3
anti-wear, anti-friction and stable dispersion... reduces friction coefficients... enhanced anti-wear and anti-friction properties
Implementation Method 4
anti-wear properties by reducing wear on copper and iron surfaces
Data Source
Figure 1a~3
Figure 4
AI summary
The present disclosure relates to an anti-wear, anti-friction and stably-dispersed lubricating oil or grease, and the anti-wear, anti-friction and stably-dispersed lubricating oil or grease includes a main component of a lubricating oil or grease and a long carbon chain-grafted sulfonated graphene, the preparation method of which includes mixing a main component of a lubricating oil or grease with a long carbon chain-grafted sulfonated graphene, stirring and dispersing the mixture to obtain the product. The lubricating oil or grease in the present disclosure can significantly improve the long-term dispersion stability and dispersion stability in a complex environment by adding a long carbon chain-grafted sulfonated graphene in the main component, and at the same time can significantly improve the friction coefficient, which can significantly improve the anti-wear and anti-friction properties of the lubricating oil or grease, reduce the diameter of wear scars, and reduce the wear of copper and iron.