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Method for improving stability of nano-aluminum particle hydrocarbon two-phase fluid fuel

A hydrocarbon fuel, nano-aluminum technology, applied in jet propulsion, rocket engine, machine/engine, etc., can solve problems such as affecting fuel storage and combustion performance, increasing specific surface area of ​​nano-aluminum particles, and increasing van der Waals force, etc. Achieve the effect of low cost of raw materials, good dispersibility and simple process

Active Publication Date: 2021-06-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the proportion of the surface atoms of the nano-aluminum particles to the particle's own volume increases with the decrease of the particle size, the van der Waals force between the surface atoms of each particle increases, which makes the particles easy to agglomerate, and at the same time, the specific surface area of ​​the nano-aluminum particles increases significantly. increased, easily oxidized
Oxidation and agglomeration will lead to the reduction of the stability of aluminum particles in liquid hydrocarbon fuels, which will affect the storage and combustion performance of fuels. Therefore, how to improve the stability of nano-aluminum two-phase fluid fuels has become a bottleneck in the development of this liquid fuel, and it is urgently needed Surface Modification and Pretreatment of Nano-Al Particles to Enhance the Stability of Nano-Al Particles in Liquid Hydrocarbon Fuels

Method used

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  • Method for improving stability of nano-aluminum particle hydrocarbon two-phase fluid fuel
  • Method for improving stability of nano-aluminum particle hydrocarbon two-phase fluid fuel
  • Method for improving stability of nano-aluminum particle hydrocarbon two-phase fluid fuel

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Effect test

Embodiment 1

[0035] (1) Preparation of nano-aluminum particles coated with polydopamine: Add 0.05 g of dopamine hydrochloride to 200 ml of tris buffer solution with pH=8.5 to react to generate dopamine molecules, and continue to add 5 g of nano-aluminum particles with a particle size of 10 nm The particles were stirred at a speed of 200rpm for 8 hours, so that dopamine molecules grew on the surface of the aluminum particles to form a polydopamine layer, and after vacuum freeze-drying, nano-aluminum particles uniformly coated with the polydopamine layer were obtained.

[0036] (2) Liquid-phase reflux heating to prepare surfactant-coated nano-aluminum particles: add 0.5 g of citric acid and 0.5 g of polydopamine-coated nano-aluminum particles to 200 ml of ethanol, magnetically stir at a speed of 200 rpm, and liquid The phase was heated under reflux for 5 hours.

[0037] Materials similar to ethanol also include toluene, methanol, n-butanol, tert-butanol, xylene, ethylene glycol, propylene gl...

Embodiment 2

[0041] (1) Preparation of nano-aluminum particles coated with polydopamine: 0.25 g of dopamine hydrochloride is added to 200 ml of tris buffer solution with pH=8.5 to react to generate dopamine molecules, and 5 g of nano-aluminum particles with a particle size of 100 nm are added The particles were stirred at a speed of 1000 rpm for 4 hours to make dopamine molecules grow on the surface of the aluminum particles to form a polydopamine layer, and after vacuum freeze-drying, nano-aluminum particles evenly coated with the polydopamine layer were obtained.

[0042] (2) Liquid-phase reflux heating to prepare surfactant-coated nano-aluminum particles: add 0.5 g hexadecanoic acid and 0.5 g polydopamine-coated nano-aluminum particles to 200 ml of ether, magnetically stir at a speed of 1500 rpm, and heat at 60° C. The lower liquid phase was heated under reflux for 3 hours.

[0043] Materials similar to diethyl ether include chloroform, carbon tetrachloride or tetrahydrofuran, etc., who...

Embodiment 3

[0047] (1) Preparation of nano-aluminum particles coated with polydopamine: 0.5 g of dopamine hydrochloride is added to 200 ml of tris buffer solution with pH=8.5 to react to generate dopamine molecules, and 5 g of nano-aluminum particles with a particle size of 900 nm are added The particles are stirred at a speed of 2000rpm for 1 hour so that dopamine molecules grow on the surface of the aluminum particles to form a polydopamine layer, and after vacuum freeze-drying, nano-aluminum particles evenly coated with the polydopamine layer are obtained.

[0048] (2) Liquid-phase reflux heating prepares surfactant-coated nano-aluminum particles: 0.5g sorbitol tristearate and 0.5g polydopamine-coated nano-aluminum particles are added in 200ml toluene, magnetically stirred at a speed of 2000rpm, and The liquid phase was heated under reflux at 120°C for 1 hour.

[0049] (3) Obtaining surfactant and polydopamine multiple-coated nano-aluminum particles: Heating the liquid phase to reflux ...

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Abstract

The invention relates to an energetic material preparation technology, and aims to provide a method for improving the stability of a nano-aluminum particle hydrocarbon two-phase fluid fuel. The method comprises the following steps: adsorbing dopamine molecules on the surfaces of nano-aluminum particles to form a polydopamine layer, and performing vacuum freeze drying to obtain nano-aluminum particles coated with the polydopamine layer; adding the nano-aluminum particles and a surfactant into a sufficient amount of solvent, performing magnetic stirring and liquid-phase reflux heating at the same time, and filtering to obtain the nano-aluminum particles with a polydopamine multi-coated structure; and washing with deionized water for multiple times, and then carrying out vacuum drying to obtain the nano-aluminum particles with the polydopamine multi-coated structure for stably dispersing hydrocarbon fuel. The adsorption rate of the surfactant on the nano-aluminum particles can be improved, the nano-aluminum particles are efficiently, stably and uniformly dispersed in the hydrocarbon fuel, and the storage and transportation performance of the hydrocarbon fuel is greatly improved. The preparation process is simple, the yield is high, the cost of the used raw materials is low, industrial production is easy to realize, and the structure of a final product can be controlled through reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of preparation of energetic materials, and relates to a method for improving the stability of nano-aluminum particle hydrocarbon two-phase fluid fuel. Specifically, the method of preparing nano-aluminum two-phase fluid fuel by coating nano-aluminum particles with multiple structures with ester derivatives and polymers, organic acids and polydopamine can be used to improve the activity of nano-aluminum particles, protect nano-aluminum particles, and improve nano-aluminum particles. The stable dispersion characteristics of aluminum particles in liquid hydrocarbon fuels improve the stability of nano-aluminum hydrocarbon two-phase fluid fuels. Background technique [0002] Energetic materials are an indispensable energy source in the modernization of national defense, and liquid hydrocarbon fuel is the main energy source for aerospace vehicles. In recent years, on the one hand, aerospace vehicles are facing lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/42
CPCF02K9/425
Inventor 刘建忠杜龙金伍婷婷杨卫娟
Owner ZHEJIANG UNIV