Ionic Liquid Grease Composition for Water Resistance and Low-Temperature Viscosity
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Solution Overview
Problem
Existing lubricating grease compositions using ionic liquids face challenges such as insolubility of additives, water absorption, corrosion issues due to anion types, and inadequate low-temperature properties, which affect their performance in extreme conditions like high and low temperatures and exposure to water.
Innovation Solution
A water-resistant lubricating grease composition is developed using ionic liquids with hydrophobic anions combined with cations having high hydrocarbon groups, allowing standard additives to be soluble and enhancing anticorrosion and oxidation stability, while maintaining low-temperature viscosity and preventing phase transitions below -30°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ionic liquids with hydrophobic anions are used as base oil, then water resistance is improved, but additive solubility deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the ionic liquid by selecting specific cation-anion combinations (e.g., imidazolium cations with bis(trifluoromethylsulfonyl)imide anions) to achieve optimal balance between hydrophobicity and additive solubility. This parameter optimization allows the base oil to simultaneously provide water resistance and maintain additive dissolution
Solution Approach 2:
The patent creates a composite lubricating grease system by combining ionic liquid base oil with specifically selected additives and thickeners. The composite formulation ensures compatibility between the hydrophobic ionic liquid and various additives, achieving both water resistance and additive solubility through careful material selection
2Temperature
If ionic liquids are used to achieve high thermal stability, then high-temperature performance is improved, but low-temperature viscosity increases
Solution Approach 1:
The patent optimizes the molecular structure parameters of the ionic liquid by selecting cations with appropriate alkyl chain lengths and anions with suitable molecular sizes. This structural parameter adjustment achieves a balance between thermal stability and low-temperature fluidity, preventing excessive viscosity increase at low temperatures while maintaining high-temperature stability
3Ease of manufacture
If standard additives are used to reduce cost, then manufacturing cost is reduced, but corrosion protection deteriorates due to water absorption
Solution Approach 1:
The patent modifies the chemical parameters of the ionic liquid base oil to enhance its hydrophobicity and oxidation resistance. This parameter optimization allows standard additives to function effectively without requiring expensive specialized additives, while the improved base oil properties provide inherent corrosion protection against water absorption
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 composition achieves excellent water resistance, thermal stability, and low-temperature performance, ensuring effective lubrication and protection against oxidation and corrosion across a wide temperature range, suitable for applications in automotive, wind power, and processing machines.
Implementation Method 1
ionic liquids with hydrophobic anions combined with cations having high hydrocarbon groups
Implementation Method 2
protection against oxidation and corrosion
Implementation Method 3
protection against oxidation and corrosion
Implementation Method 4
preventing phase transitions below -30°C
Data Source
AI summary
The invention relates to the use of ionic liquids for production of water-resistant lubricating grease compositions, which are used in a temperature range from at least 30° C. to at least 180° C. and have good anticorrosion properties.