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A rare-earth metal-organic complex microsphere wave-absorbing material and its preparation method

A technology of organic complexes and rare earth metals, applied in the field of new metal-organic framework materials, can solve problems such as high equipment performance requirements, difficult process control, long synthesis process, etc., achieve excellent microwave absorption performance, realize industrial production, and prepare methods simple effect

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

AI Technical Summary

Problems solved by technology

However, these microsphere preparation technologies still have many technical defects, such as long synthesis process, high equipment performance requirements, difficult process control, etc.

Method used

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  • A rare-earth metal-organic complex microsphere wave-absorbing material and its preparation method
  • A rare-earth metal-organic complex microsphere wave-absorbing material and its preparation method
  • A rare-earth metal-organic complex microsphere wave-absorbing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Example 1: Preparation of rare earth metal organic complex microsphere absorbing material of the present invention

[0100] The implementation steps of this embodiment are as follows:

[0101] A. Prepare the mixture solution

[0102] According to the ratio of rare earth metal salt in grams to solvent in milliliters of 1:4, the rare earth metal salt of praseodymium nitrate hexahydrate and maleic hydrazide are in DMF solvent according to their molar ratio of 1:4, at an ultrasonic frequency of 20kHz and power Density 0.30W / cm 2 Dissolved under the action of ultrasonic waves for 35min to obtain a mixture solution;

[0103] B. Microwave catalytic reaction

[0104] The mixture solution obtained in step A was reacted for 40 minutes in a microwave reactor under the conditions of microwave power 90W, temperature 100-160°C and pressure 16bar;

[0105] C. washing

[0106] Allow the reaction solution obtained in step B to cool down to room temperature naturally, filter, and wa...

Embodiment 2

[0112] Example 2: Preparation of rare earth metal organic complex microsphere absorbing material of the present invention

[0113] The implementation steps of this embodiment are as follows:

[0114] A. Prepare the mixture solution

[0115] According to the ratio of rare earth metal salt in grams to solvent in milliliters of 1:5, the mixture of praseodymium nitrate hexahydrate and lanthanum nitrate hexahydrate (weight ratio 1:1) rare earth metal salt and maleic hydrazide according to the molar ratio of 1 : 1 in ethanol solvent, at ultrasonic frequency 25kHz and power density 0.35W / cm 2 Dissolved under the action of ultrasonic waves for 28min to obtain a mixture solution;

[0116] B. Microwave catalytic reaction

[0117] The mixture solution obtained in step A was reacted in a microwave reactor under the conditions of microwave power 150W, temperature 160°C and 20bar for 5min;

[0118] C. washing

[0119] Allow the reaction solution obtained in step B to cool down to room ...

Embodiment 3

[0125] Example 3: Preparation of rare earth metal organic complex microsphere absorbing material of the present invention

[0126] The implementation steps of this embodiment are as follows:

[0127] A. Prepare the mixture solution

[0128] According to the ratio of rare earth metal salt in grams to solvent in milliliters of 1:8, the mixture of praseodymium nitrate hexahydrate, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate (weight ratio 1:1:1) rare earth metal salt and maleic dinitrate Hydrazide is in water solvent according to its molar ratio of 1:5, at an ultrasonic frequency of 30kHz and a power density of 0.32W / cm 2 Dissolved under the action of ultrasonic waves for 25min to obtain a mixture solution;

[0129] B. Microwave catalytic reaction

[0130] The mixture solution obtained in step A was reacted in a microwave reactor for 80 minutes under the conditions of microwave power 100W, temperature 130°C and pressure 14bar;

[0131] C. washing

[0132] All...

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Abstract

The invention relates to a rare earth metal organic complex microsphere wave-absorbing material and a preparation method thereof. The preparation method comprises the steps of preparing mixture solution, microwave catalytic synthesis, washing, soaking and heat treatment. Compared with the prior art, the rare earth metal organic complex microsphere absorbing material of the present invention has excellent absorbing performance, the preparation method is extremely simple, no high-temperature carbonization is required, the operation is safe, and it is extremely beneficial to realize industrial production, so it has extremely wide applications prospect.

Description

【Technical field】 [0001] The invention belongs to novel metal organic framework materials. More specifically, the present invention relates to a rare earth metal organic complex microsphere absorbing material, and also relates to a preparation method of the rare earth metal organic complex microsphere absorbing material. 【Background technique】 [0002] The wide application of rare earth metals in military industry, metallurgy, petrochemical industry, ceramics, agriculture, etc. makes it the title of industrial gold. Rare earth metals have unique 4f electron orbitals, and the outer S and P orbital electrons have a strong shielding effect on 4f orbitals, making rare earth metals have unique magnetic properties and coordination properties. These rare earth metal ions have large radii and high coordination numbers, and are more likely to activate organic ligands than transition metals and main group metals. Their Lewis acid properties endow them with oxophilic and nitrogenophi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C09K3/00
CPCC07F5/00C09K3/00
Inventor 李霞朱立伟于良民姜晓辉
Owner OCEAN UNIV OF CHINA