High-efficiency synthetic method of nanometer aluminum particle

Abstract

The invention relates to a high-efficiency synthetic method of a nanometer aluminum particle. Products can be used for manufacturing thin film solar cell materials in order to improve the photoelectric conversion efficiency; the products can also be used for solid rocket fuel push agent. The invention belongs to the field of preparing novel functional materials. The nanometer aluminum particle regards a hyperbranched polymer as solvent, reducing agent and dispersing agent. After the hyperbranched polymer is contacted with trivalent aluminum ion, a spontaneous reduction reaction happens in the aqueous solution and a core-shell structure material is generated. An outer sphere of the core-shell structure material is an overrunning compound, and an inner sphere of the core-shell structure material is the nanometer aluminum particle. When a reaction system is placed in a strong magnetic field generator to be used for controlling the strength and the action time of the magnetic field, the reduction reaction efficiency and the product productivity can be improved by various degrees.

Description

technical field [0001] The invention relates to a high-efficiency preparation method of nano-aluminum particles. In an aqueous solution at normal temperature, a hyperbranched polymer spontaneously reduces trivalent aluminum ions to generate nano-aluminum particles. ; Putting the reaction system in a strong magnetic field can increase the reaction rate and yield. Background technique [0002] Nanomaterials are an important research and development direction in nanoscience. In recent years, they have attracted extensive attention in many scientific fields and become a hot spot in material science research. As an aspect of nanomaterials, metal and its alloy nanoparticles are widely used in modern industries. plays an important role in national defense and high-tech development; nanoparticles refer to ultrafine particles with a size of 1-100 nm, and the ratio of the surface atoms to the total number of atoms of nanoparticles increases sharply as the particle size decreases , sh...

AI Technical Summary

Problems solved by technology

[0004] From the perspective of the current nano-aluminum particle preparation technology, physical methods are the main method, mechanical friction of bulk materials, evaporation condensation and template electrochemical deposition, etc. The principle is to evaporate bulk aluminum at a temperature near the boiling point, followed by condensation. The evaporation heat source comes from high-frequency power supply, laser, DC arc plasma heating, electric explosion, etc. Through analysis, it is found that the preparation of nano-aluminum particles by physical methods has "near-boiling point ultra-high temperature preparation, large nano-particle size, wide particle size range, and low preparation efficiency." "And "the passivation process is difficult to control and the loss of aluminum particles is serious", so it is believed that: exploring the chemical method to prepare nano-aluminum particles at room temperature should attract attention; at present, there are many methods for preparing metal nanoparticles in liquid phase, including chemical Reduction method, microemulsion method, radiation synthesis method, etc., but according to the current literature, there are few reports on the preparation of nano-aluminum particles by liquid phase method at home and abroad.

[0005] 2010 Ghanta Reduction of AlCl with lithium aluminum hydride in trimethylbenzene with polyvinylpyrrolidone or methyl methacrylate 3 Nano-aluminum particles were prepared, and the reaction was continued at 165°C for 24 hours with stirring, and composite materials with different Al / polymer ratios were prepared by liquid phase synthesis; the main problems were: the reaction time was long, and the size of the prepared nanoparticles was The range is 47-158nm, which has the problem of large scale and wide particle size range, which also affects the stability of the particles, and there are non-spherical particles in the product, and the non-uniform shape and size of the nano-aluminum particles exert their functional characteristics. unfavorable

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