Spontaneous combustion type multi-ion liquid with adjustable and controllable performance

An ionic liquid and multi-ion technology, applied in the direction of organic chemistry, can solve the problems of lack of multi-ionic liquid properties and application patents and research reports, and achieve the effect of broadening the applicable range, high safety, and low viscosity

Pending Publication Date: 2020-10-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no ionic liquid mixture used in the field of energetic materials, and there are no related patents and research reports on the proposal, properties and applications of multi-ionic liquids as a whole

Method used

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  • Spontaneous combustion type multi-ion liquid with adjustable and controllable performance
  • Spontaneous combustion type multi-ion liquid with adjustable and controllable performance
  • Spontaneous combustion type multi-ion liquid with adjustable and controllable performance

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0046] It is prepared by directly mixing a single ionic liquid, and the ion composition and ion ratio: the molar ratio of 1-ethyl-3-methylimidazolium cation, cyanoborohydride anion, and dicyanamide anion is 1:0.7:0.3.

[0047] Mix 30mmol of 1-ethyl-3-methylimidazolium dicyanamide ([EMIM][DCA]) with 70mmol of 1-ethyl-3-methyl-imidazolium cyanoborohydrogen ([EMIM][CBH]) Stirring and mixing to prepare multiionic liquid [EMIM][CBH] 0.7 [DCA] 0.3 .

[0048] The polyionic liquid was tested and characterized, the viscosity of the polyionic liquid was 17.4cP, and the density was 1.004g·mL -1 , the ignition delay time is 3ms, and the calculated specific impulse is 2415m·s -1 . Its ignition delay time is 26ms shorter than that of the single self-ignitable ionic liquid [EMIM][DCA], and 7ms shorter than that of the single self-ignitable ionic liquid [EMIM][CBH]. The ignition test process is as follows: figure 1 As shown, when the multi-ionic liquid is dropped into a strong oxidant, ...

example 2

[0050] Prepared by a one-pot synthesis method, the ion composition and ion ratio: the molar ratio of 1-ethyl-3-methylimidazolium cation, cyanoborohydride anion, and dicyanamide anion is 1:0.3:0.7.

[0051] Weigh 70mmol of silver dicyanamide (Ag[DCA]) and 30mmol of sodium cyanoborohydride (Na[CBH]) and disperse them in 300mL of anhydrous methanol and stir. Then weigh 100mmol of 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) and dissolve it in 300mL of anhydrous methanol and stir until completely dissolved, then add it dropwise to the above dispersion, and continue stirring at room temperature for 48h . Remove solid sodium chloride and silver chloride by filtration, remove the solvent methanol from the filtrate by rotary evaporation, dry in vacuum at 60°C for 24 hours, and then freeze-dry for 12 hours to obtain the multiionic liquid [EMIM][CBH] 0.3 [DCA] 0.7 .

[0052] The polyionic liquid was tested and characterized, the viscosity of the polyionic liquid was 16.8cP, and th...

example 3

[0054] It is prepared by a one-pot synthesis method, and the ion composition and ion ratio: the molar ratio of 1-ethyl-3-methylimidazolium cation, dicyanamide anion, and cyanoborohydride anion is 1:0.5:0.5.

[0055]Weigh 65mmol of silver dicyanamide (Ag[DCA]) and 65mmol of sodium cyanoborohydride (Na[CBH]) and disperse them in 130mL of anhydrous methanol and stir. Then weigh 130mmol of 1-ethyl-3-methylimidazolium chloride ([EMIM]Cl) and dissolve it in 130mL of anhydrous methanol and stir until completely dissolved, then add it dropwise to the above dispersion, and continue stirring at room temperature for 72h . Remove solid sodium chloride and silver chloride by filtration, remove the solvent methanol from the filtrate by rotary evaporation, and dry in vacuum at 80°C for 48 hours to obtain the multiionic liquid [EMIM][CBH] 0.5 [DCA] 0.5 .

[0056] The polyionic liquid was tested, the viscosity of the polyionic liquid was 17.0cP, and the density was 1.030g·mL -1 , the ignit...

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Abstract

The invention relates to a spontaneous combustion type multi-ion liquid with adjustable and controllable performance. A multi-ion liquid is a room temperature liquid composed of at least three ions according to different proportions, the at least three ions comprise at least one anion and at least one cation, and at least one of the anions is a spontaneous combustion type anion, and the spontaneous combustion type anions are mixed with fuming nitric acid or hydrogen peroxide and then subjected to spontaneous combustion ignition. The spontaneous combustion type is characterized by spontaneous combustion ignition after being mixed with fuming nitric acid or hydrogen peroxide. The performance regulation and control means that spontaneous combustion type multi-ion liquids with different performances can be obtained by changing the types and proportions of constituent ions. The spontaneous combustion type multi-ion liquid combines the characteristic advantages of multiple ions, can effectively improve the performance defects of a single spontaneous combustion type ion liquid, has the excellent properties of low viscosity, high density, high specific impulse, fast ignition and the like,and is a novel green propellant fuel with the most potential to replace hydrazine and derivatives thereof.

Description

technical field [0001] The invention relates to a self-combustible multiionic liquid with adjustable performance. This self-igniting multi-ionic liquid has the advantages of low toxicity, low viscosity, high density, high safety, wide liquid phase range, high stability and adjustable performance. It is suitable for propellant fuel and belongs to the field of energetic materials. Background technique [0002] Traditional propellant fuels such as hydrazine and its derivatives have disadvantages such as highly toxic, highly corrosive, hygroscopic, flammable and explosive, and pollute the environment. They are prone to leakage during production, transportation, filling, launching, etc., causing personnel Poisoning, explosion and fire accidents. Therefore, it is an inevitable trend for the future development of propellant fuels to seek clean and safe high-energy fuels with excellent performance. [0003] Ionic liquids usually refer to molten salts that are in a liquid state bel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/56
CPCC07D233/56
Inventor 唐韶坤孙常庚
Owner TIANJIN UNIV
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