Fluorine-Containing Phosphate Ester Ionic Liquids for Low Friction Lubrication
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Solution Overview
Problem
Conventional fluorine-containing ionic liquids exhibit suboptimal friction performance, necessitating the development of a superior lubricant with improved friction characteristics.
Innovation Solution
The use of ionic liquids containing fluorine-containing phosphate ester anions, which demonstrate a low friction coefficient and are suitable as base oils in lubricating oil compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluorine-containing ionic liquids are used as lubricants, then they exhibit non-volatility, flame retardancy and high heat resistance, but they show insufficient friction performance
Solution Approach 1:
The patent changes the chemical structure parameters of the ionic liquid by introducing fluorine-containing phosphate ester anions with specific molecular structures (formula 1) and combining them with various cations (formula 2). This structural parameter change results in significantly improved friction performance while maintaining the beneficial properties of conventional fluorine-containing ionic liquids.
Solution Approach 2:
The patent creates composite ionic liquid structures by combining specific cations (formula 2) with fluorine-containing phosphate ester anions (formula 1) to form new composite ionic liquid molecules. This composite approach integrates the advantages of both components, achieving superior friction performance compared to conventional single-structure ionic liquids.
2Reliability
If fluorine-containing ionic liquids are used to achieve non-volatility and heat resistance, then they provide basic lubricant properties, but further improvements in friction performance are desired
Solution Approach 1:
The patent systematically varies parameters such as the perfluoroalkyl group (Rf) chain length (1-14 carbon atoms) and the alkyl group (R1) structure in the cation to optimize friction performance. This parameter optimization approach allows achieving superior lubrication while managing molecular complexity through structured variation rather than random complexity increase.
Data Source
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AI summary
Provided are: an ionic liquid including the fluorine-containing phosphate ester anions represented by formula (1); and a lubricating oil composition including said ionic liquid. (In the formula, Rf represents a C1-14 perfluoroalkyl group. R1 represents a C1-8 alkyl group.)