Radiation Crosslinked Rubber Lubricant Viscosity Control
Solution Overview
Problem
Existing lubricant compositions have poor viscosity-temperature relationships, leading to disproportionate viscosity changes with temperature, which limits their application range and efficiency.
Innovation Solution
A lubricant composition featuring rubber particles with a radiation crosslinked structure, dispersed in a base oil, which allows for adjustable viscosity across temperature changes, providing a higher viscosity index and improved antiwear and friction-reducing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional lubricant compositions are used, then basic lubrication function is provided, but viscosity-temperature relationship is poor leading to disproportionate viscosity changes
Solution Approach 1:
The patent uses a composite system consisting of polymer particles dispersed in base oil, where the polymer particles contain both hydrophobic and hydrophilic segments. This composite structure allows the lubricant to maintain stable viscosity across temperature changes by combining the properties of different material phases - the hydrophobic segments interact with the base oil while the hydrophilic segments form structured networks that resist viscosity change.
Solution Approach 2:
The patent changes the physical-chemical parameters of the lubricant system by introducing polymer particles with specific molecular weight ranges (10,000-1,000,000) and specific compositional parameters (hydrophobic/hydrophilic segment ratios). These parameter changes enable the lubricant to achieve a viscosity index of 150 or higher, transforming the temperature-viscosity characteristics from poor to excellent.
2Temperature
If viscosity is increased to improve high-temperature film formation, then high-temperature lubrication is improved, but low-temperature pumping becomes difficult
Solution Approach 1:
The patent creates a dynamic viscosity system where the polymer particles can reconfigure their molecular structure in response to temperature changes. At low temperatures, the polymer chains remain flexible and do not form strong networks, allowing easy pumping. At high temperatures, the chains become more rigid and form structured networks that enhance film formation, achieving adaptive viscosity control.
Solution Approach 2:
The patent introduces local quality differentiation within the polymer particles by incorporating both hydrophobic and hydrophilic segments in specific ratios. The hydrophobic segments provide compatibility with the base oil for good low-temperature flow, while the hydrophilic segments create structured networks for high-temperature film strength, allowing different regions of the same particle to serve different functional purposes.
3Reliability
If nanomaterials are added to improve lubrication properties, then friction reduction is enhanced, but dispersion stability becomes challenging
Solution Approach 1:
The patent uses polymer particles as intermediary carriers for the nanomaterials. The polymer particles with amphiphilic structure act as a bridge between the hydrophobic base oil and the nanomaterials, preventing direct aggregation of nanomaterials while maintaining their lubrication-enhancing properties. This intermediary approach solves the dispersion stability problem without sacrificing the friction reduction benefits.
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 lubricant composition effectively adjusts viscosity with temperature, enhancing its applicability across a broad temperature range, improving low-temperature pumping, high-temperature film formation, and overall lubricating performance while maintaining excellent aging resistance and color fastness.
Implementation Method 1
rubber particles having radiation crosslinked structure
Implementation Method 2
rubber particles having radiation crosslinked structure, dispersed in a base oil
Data Source
AI summary
The present invention relates to the field of lubricant, and specifically provides a lubricant composition and its preparation method and use. The lubricant composition comprises a base oil and rubber particles having radiation crosslinked structure dispersed therein, wherein the base oil is continuous phase and the rubber particles are dispersed phase. The viscosity of the lubricant composition of the present invention can be effectively adjusted as temperature changes. As compared with the lubricant composition comprising chemically crosslinked rubber particles, it has a lower viscosity at low temperatures and a higher viscosity at high temperatures, and has a relatively high viscosity index, which can meet the application requirements at the temperature above 200°C. In addition, the lubricant composition of the present invention also has excellent antiwear and friction-reducing properties.