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A kind of electromagnetic wave absorber using titanium-based metal organic framework material as precursor and preparation method thereof

An organic framework and electromagnetic absorbing technology, which is applied in the preparation of electromagnetic absorbing agents and the field of electromagnetic absorbing agents, can solve the problems of not eradicating electromagnetic waves, etc., and achieve the effects of excellent reflection loss, simple process, and excellent absorbing performance

Active Publication Date: 2020-03-10
常州威斯双联科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electromagnetic shielding and absorption methods are the main methods of protecting electromagnetic radiation, and the shielding method only reflects electromagnetic waves back, and does not eradicate electromagnetic waves.

Method used

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  • A kind of electromagnetic wave absorber using titanium-based metal organic framework material as precursor and preparation method thereof
  • A kind of electromagnetic wave absorber using titanium-based metal organic framework material as precursor and preparation method thereof
  • A kind of electromagnetic wave absorber using titanium-based metal organic framework material as precursor and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the electromagnetic wave absorbing agent using the titanium-based metal organic framework material as the precursor of the present invention comprises the following steps:

[0028] Step 1, preparation of titanium-based metal organic framework material precursor: take 18ml of N,N-dimethylformamide and 2ml of methanol respectively in a clean beaker, mix and stir evenly, and then add 1.0g of terephthalic acid to it, Mix and stir evenly, and finally add 1.2ml tetraisopropyl titanate to it, mix and stir evenly, transfer the mixture to a 100ml reactor and react at 150°C for 15 hours; filter and wash the product after the reaction , drying treatment;

[0029] In step 2, the precursor product of titanium-based metal organic framework material obtained in step 1 is calcined at high temperature under a nitrogen atmosphere to carbonize the titanium MOF; the calcining temperature is 700°C, the heating rate is 2°C / min, and the holding time is 4h. Porous Ti...

Embodiment 2

[0031] The preparation method of the electromagnetic wave absorbing agent using the titanium-based metal organic framework material as the precursor of the present invention comprises the following steps:

[0032] Step 1, preparation of titanium-based metal organic framework material precursor: take 18ml of N,N-dimethylformamide and 2ml of methanol respectively in a clean beaker, mix and stir evenly, and then add 1.0g of terephthalic acid to it, Mix and stir evenly, and finally add 1.2ml tetraisopropyl titanate to it, mix and stir evenly, transfer the mixture to a 100ml reactor and react at 150°C for 15 hours; filter and wash the product after the reaction , drying treatment;

[0033] In step 2, the precursor product of titanium-based metal organic framework material obtained in step 1 is calcined at high temperature under a nitrogen atmosphere to carbonize the titanium MOF; the calcining temperature is 800°C, the heating rate is 2°C / min, and the holding time is 4h. Porous Ti...

Embodiment 3

[0035] The preparation method of the electromagnetic wave absorbing agent using the titanium-based metal organic framework material as the precursor of the present invention comprises the following steps:

[0036] Step 1, preparation of titanium-based metal organic framework material precursor: take 18ml of N,N-dimethylformamide and 2ml of methanol respectively in a clean beaker, mix and stir evenly, and then add 1.0g of terephthalic acid to it, Mix and stir evenly, and finally add 1.2ml tetraisopropyl titanate to it, mix and stir evenly, transfer the mixture to a 100ml reactor and react at 150°C for 15 hours; filter and wash the product after the reaction , drying treatment;

[0037] In step 2, the precursor product of titanium-based metal organic framework material obtained in step 1 is calcined at high temperature under a nitrogen atmosphere to carbonize the titanium MOF; the calcining temperature is 900°C, the heating rate is 2°C / min, and the holding time is 4h. Porous Ti...

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Abstract

The invention discloses an electromagnetic wave absorber with a titanium-based metal organic frame material as a precursor and a preparation method thereof. The electromagnetic wave absorber is a porous TiO2 / C composite; in the composite material, the TiO2 is in the form of particles and the TiO2 particles are evenly distributed around the porous carbon; pore volume Vpore of the carbon material is 0.2313 cm<3> / g when the calcination temperature is 800 DEG C; the crystal form of the TiO2 is a rutile phase; the diameter of the TiO2 particles is 100 nm. The invention also discloses a preparation method for the electromagnetic wave absorber with the titanium-based metal organic frame material as the precursor. The porous carbon-based composite material prepared by using the titanium MOF as the precursor has excellent wave absorbing performance as the electromagnetic wave absorber, and the porous structure can enable the electromagnetic wave to reflect and absorb many times within the material, so as to achieve excellent reflection loss; the preparation method is simple in process and low in cost, needs no complicated synthesis equipment, and can promote mass-production on a large scale.

Description

technical field [0001] The present invention relates to an electromagnetic absorber with titanium-based metal-organic framework material as a precursor, and also relates to a preparation method of the electromagnetic absorber with titanium-based metal-organic framework material as a precursor, belonging to the technical field of microwave absorbing materials. Background technique [0002] With the development of modern science and technology, electronic products are becoming more and more popular. While electronic products bring great convenience to people, the electromagnetic radiation and electromagnetic interference generated during the working process of electronic and electrical equipment affect human production and life, causing human The electromagnetic environment in living space is deteriorating day by day. In addition, in the military, as modern warfare moves toward informationization, the possibility of military defense systems and aircraft being detected, tracked...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K3/00
CPCC08G83/008C09K3/00
Inventor 姬广斌马建娜刘伟
Owner 常州威斯双联科技有限公司
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