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Preparation method of metal-organic framework material modified metal nanoparticles

A technology of nano metal particles and metal organic frameworks, which is applied to attack equipment, generation of compressed gas, non-explosive/non-thermal agent components, etc., can solve problems such as poor practicability, achieve good practicability, improve energy performance, and the method is simple Effect

Active Publication Date: 2019-03-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of poor practicability of existing material modification methods, the present invention provides a method for preparing metal-organic framework material modified nano-metal particles

Method used

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  • Preparation method of metal-organic framework material modified metal nanoparticles
  • Preparation method of metal-organic framework material modified metal nanoparticles
  • Preparation method of metal-organic framework material modified metal nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1. Coating of nano aluminum powder: Measure 400 ml of deionized water and add it to a three-necked flask, weigh 0.54 g of Tri buffer and 0.72 g of dopamine into the deionized water, and stir until the color becomes slightly yellow. Add 7.2g of nano aluminum powder, stir quickly for 10 hours, filter and freeze-dry in vacuum;

[0030] Step 2. Preparation of energetic MOF ligand: Weigh 483mg copper nitrate and 148mg H 2 BT was dissolved in 100ml of deionized water, stirred for 30 minutes, filtered and washed with deionized water 3 times.

[0031] Step 3. Coordination of transition metal ions: 150 mg of copper nitrate and 50 mg of dopamine-coated nano aluminum powder were stirred in 100 ml of deionized water for 2 hours, and filtered.

[0032] Step 4. Hydrothermal nano-aluminum powder shows that the energetic MOF crystal is grown in situ: Take the nano-aluminum particles immobilized with transition metal ions and the energetic MOF ligand prepared in the above steps, and add t...

Embodiment 2

[0039] Step 1. Coating of nano aluminum powder: Measure 400 ml of deionized water and add it to a three-necked flask, weigh 0.54 g of Tri buffer and 0.72 g of dopamine into the deionized water, and stir until the color becomes slightly yellow. Add 7.2g of nano aluminum powder, stir quickly for 10 hours, filter and freeze-dry in vacuum;

[0040] Step 2. Preparation of energetic MOF ligand: Weigh 483mg copper nitrate and 178mg DHBT in 100ml deionized water, stir for 30 minutes, filter and wash with deionized water 3 times.

[0041] Step 3. Immobilization of transition metal ions: 150 mg of copper nitrate and 50 mg of dopamine coated nano aluminum powder were stirred in 100 ml of deionized water for 2 hours and filtered.

[0042] Step 4. In-situ growth of energetic MOF by hydrothermal method: Take the transition metal ion-immobilized nano aluminum particles and energetic MOF ligand prepared in the above steps, and add them to 50ml of methanol and N,N-dimethylacetamide In the mixed solv...

Embodiment 3

[0048] Step 1. Coating of nano aluminum powder: Measure 400 ml of deionized water and add it to a three-necked flask, weigh 0.54 g of Tri buffer and 0.72 g of dopamine into the deionized water, and stir until the color becomes slightly yellow. Add 7.2g of nano aluminum powder, stir quickly for 10 hours, filter and freeze-dry in vacuum;

[0049] Step 2. Preparation of energetic MOF ligand: Weigh 483mg copper nitrate and 178mg DHBT in 100ml deionized water, stir for 30 minutes, filter and wash with deionized water 3 times.

[0050] Step 3. Immobilization of transition metal ions: 150 mg of copper nitrate and 150 mg of dopamine coated nano aluminum powder were stirred in 100 ml of deionized water for 2 hours, and filtered.

[0051] Step 4. In-situ growth of energetic MOF by hydrothermal method: Take the transition metal ion-immobilized nano aluminum particles and energetic MOF ligand prepared in the above steps, and add them to 50ml of methanol and N,N-dimethylacetamide In the mixed so...

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Abstract

The invention discloses a preparation method of metal-organic framework (MOF) material modified metal nanoparticles, used for solving the technical problem that the conventional material modificationmethod is poor in practicality. According to the technical scheme, the preparation method comprises the following steps: coating a nano aluminum powder; preparing an energetic MOF ligand, and coordinating transition metal ions; performing in-situ growth on the energetic MOF ligand; finally, washing the product with deionized water, filtering, performing freeze drying and collecting. Since the energetic MOF ligand grows on the surface of the nano aluminum powder in situ, heat release of the MOF material modified metal nanoparticles is greatly improved to 4000G g<-1> or more. The method is simple and high-efficiency, the energy performance is improved by utilizing multistage heat release capability of the system, the ignition ability and the heat release rate are regulated by selecting different energetic MOFs, and the practicality is excellent.

Description

Technical field [0001] The invention relates to a material modification method, in particular to a preparation method of metal organic framework material modified nano metal particles. Background technique [0002] Due to its high density, low oxygen consumption, and high combustion enthalpy, aluminum powder can effectively increase the specific impulse in solid propellants, and its raw materials are abundant and the cost is low, so it can be widely used as an energy additive material. With the development of nanotechnology, nano-aluminum powder has begun to be used in propellant aluminum, which has shown great advantages in improving the energy performance and combustion efficiency of the propellant. When nano-aluminum powder is used to replace traditional micro-aluminum powder in propellant, the combustion rate and specific impulse of the propellant can be greatly improved. However, the application of nano-aluminum powder also faces some of the following problems: 1) Nano-alum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/00C06B23/00C06D5/00
CPCC06B23/00C06B33/00C06D5/00
Inventor 严启龙何伟吕杰尧刘佩进何国强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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