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Cyclotriphosphazene ionic liquid used as lubricant and preparation method thereof

A technology of cyclotriphosphazene and ionic liquid, which is applied in the field of cyclotriphosphazene ionic liquid and its preparation, can solve the problems of expensive cost, complex synthesis steps, substrate corrosion limitation, etc., and achieve cost reduction, good friction stability and The effect of anti-wear and anti-friction properties

Active Publication Date: 2014-02-12
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ionic liquids reported in the literature as lubricants are generally ionic liquids in which quaternary ammonium, quaternary phosphorus, pyridine, and imidazoles are cationic. These ionic liquids all need to be prepared through steps such as alkylation, ion exchange, separation, and purification. Complicated synthesis steps, high cost, and corrosion to substrates limit their application in the field of tribology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] [Li(P 3 N 3 (OR 2 ) 6 ] BF 4 Synthesis

[0025] Add 9.61 g (0.08 mol) of diethylene glycol monomethyl ether and 1.84 g (0.08 mol) of sodium into a 250 ml three-neck flask, and stir at about 115 °C under the protection of argon until the sodium reaction is complete to obtain a sodium alkoxide solution. Using 120 ml tetrahydrofuran as a solvent, add 4.64 g (0.0133 mol) hexachlorotriphosphazene to the above sodium alkoxide solution, stir and react at room temperature for about 10 h, dissolve the product in chloroform, wash with water, and dry to obtain cyclotriphosphazene di Glycol monomethyl ether derivative P 3 N 3 (OR 2 ) 6 9.9 g (87.2% yield). Will P 3 N 3 (OR 2 ) 6 with 6 times the molar amount of LiBF 4 Mix and stir until a homogeneous ionic liquid lubricant [Li(P 3 N 3 (OR 2 ) 6 ] BF 4 . Its average friction coefficient and wear volume at 500 N, 200 °C are 0.098 and 121.8×10 -5 mm 3 .

Embodiment 2

[0027] [Li(P 3 N 3 (OR 3 ) 6 ] BF 4 Synthesis

[0028] Add 16.43 g (0.1 mol) of triethylene glycol monomethyl ether and 2.3 g (0.1 mol) of sodium into a 250 ml three-neck flask, and stir at about 120 °C under the protection of argon until the sodium reaction is complete to obtain a sodium alkoxide solution. Using 150 ml of tetrahydrofuran as a solvent, add 5.8 g (0.0166 mol) of hexachlorotriphosphazene to the above sodium alkoxide solution, stir and react at room temperature for about 11 h, dissolve the product in chloroform, wash with water, and dry to obtain cyclotriphosphazene tris Glycol monomethyl ether derivative P 3 N 3 (OR 3 ) 6 16.13 g (86.8% yield). Will P 3 N 3 (OR 3 ) 6 with 6 times the molar amount of LiBF 4 Mix and stir until a homogeneous ionic liquid lubricant [Li(P 3 N 3 (OR 3 ) 6 )]BF 4 . Its average friction coefficient and wear volume at 500 N, 200 °C are 0.097 and 120.5×10 -5 mm 3 .

Embodiment 3

[0030] [Li(P 3 N 3 (OR 4 ) 6 ] BF 4 Synthesis

[0031] Add 12.5 g (0.06 mol) tetraethylene glycol monomethyl ether and 1.38 g (0.06 mol) sodium into a 250 ml three-neck flask, and stir at about 125 °C under the protection of argon until the sodium reaction is complete to obtain a sodium alkoxide solution. Using 100 ml tetrahydrofuran as a solvent, add 3.48 g (0.01 mol) hexachlorotriphosphazene to the above sodium alkoxide solution, stir and react at room temperature for about 12 h, dissolve the product in chloroform, wash with water, and dry to obtain cyclotriphosphazene tetra Glycol monomethyl ether derivative P 3 N 3 (OR 4 ) 6 11.6 g (83.9% yield). Will P 3 N 3 (OR 4 ) 6 with 6 times the molar amount of LiBF 4 Mix and stir until a homogeneous ionic liquid lubricant [Li(P 3 N 3 (OR 4 ) 6 ] BF 4 . Its average friction coefficient and wear volume at 500 N, 200 °C are 0.099 and 113.5×10 -5 mm 3 .

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Abstract

The invention discloses a cyclotriphosphazene ionic liquid used as a lubricant and a preparation method thereof. The ionic liquid is prepared by mixing the following components together: diglycol monomethyl ether, triglycol monomethyl ether, or tertglygol monomethyl ether derivatives of cyclotriphosphazene, lithium tetrafluoroborate, lithium hexafluorophosphate, and lithium trifluoromethanesulfonate or bis(trifluoromethane)sulfonimide lithium. The ionic liquid has a good chemical stability, thermal stability, and abrasion reducing and wear-resistant performance. The preparation method of the ionic liquid provided by the invention has the advantages of simple preparation process, low cost, excellent performance, and suitability for industrial application.

Description

technical field [0001] The invention relates to a cyclotriphosphazene ionic liquid used as a lubricant and a preparation method thereof. The ionic liquid lubricant has excellent friction-reducing and anti-wear properties. Background technique [0002] In recent years, as an efficient green solvent and environment-friendly catalyst, ionic liquids have received widespread attention in the fields of organic synthesis, catalysis, and electrochemistry (Welton, T.; Wasserscheid, P. German: Wiley-VCH, 2002, 23.), It has the characteristics of non-flammable and explosive, low melting point, extremely low volatility and high thermal stability, which is very consistent with the expected performance of an ideal lubricant. It is a new type of lubricant with great development prospects (Ye, C.; Liu, W.; Chen, Y.; Yu, L. Chem. Commun. 2001, 21 , 2244-2245.). At the same time, the unique "designability" of ionic liquids allows us to introduce one or more functional groups into the catio...

Claims

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Application Information

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IPC IPC(8): C10M105/74C07F9/6593C07C311/48C07C309/06C07C303/32C07C303/40
Inventor 凡明锦宋增红周峰刘维民梁永民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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