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Wave-absorbing material derived from NiCo-MOF/biomass cotton and preparation method thereof

A wave-absorbing material and biomass technology, applied in carbon preparation/purification, metal processing equipment, transportation and packaging, etc., can solve problems such as narrow effective absorption bandwidth, complex synthesis process, expensive raw materials, etc., and achieve improved electromagnetic wave absorption performance , Simple preparation process and low cost

Pending Publication Date: 2022-01-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of complex synthetic process, expensive raw materials, high density, narrow effective absorption bandwidth and the like in the prior art

Method used

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  • Wave-absorbing material derived from NiCo-MOF/biomass cotton and preparation method thereof
  • Wave-absorbing material derived from NiCo-MOF/biomass cotton and preparation method thereof
  • Wave-absorbing material derived from NiCo-MOF/biomass cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a wave-absorbing material derived from NiCo-MOF / biomass cotton, comprising the steps of:

[0031] (1): Soak 800mg of cotton in 270mL containing H 2 o 2 (2mol / L), Na 2 SiO 3 (0.02 mol / L) and NaOH (0.25 mol / L) mixed aqueous solution. Soak at 90°C for 1 hour. The soaked cotton was washed 6 times with hot water at 70 °C and deionized water at room temperature to remove impurities, and the obtained product was purified and dried under vacuum at 60 °C to obtain activated cotton.

[0032] (2): 106mg of 1,2,3-propanetricarboxylic acid was dissolved in 60mL of DMF (2547mL / g), magnetically stirred for 30min to obtain solution A; 349mg of Ni(NO 3 )·6H 2 O and 349mg Co(NO 3 ) 2 ·6H 2 O (mass ratio of 1:1) was added to the mixed solution of ethanol and water to obtain solution B; after the cotton obtained in step (1) was soaked in solution A and left to stand for 24 hours, the resulting mixed solution was added to the In solution B, react in a stain...

Embodiment 2

[0035] A preparation method of a wave-absorbing material derived from NiCo-MOF / biomass cotton, comprising the steps of:

[0036] (1): Soak 800mg of cotton in 270mL containing H 2 o 2 (2mol / L), Na 2 SiO 3 (0.02 mol / L) and NaOH (0.25 mol / L) mixed aqueous solution. Soak at 90°C for 1 hour. The soaked cotton was washed 6 times with hot water at 70 °C and deionized water at room temperature to remove impurities, and the obtained product was purified and dried under vacuum at 60 °C to obtain activated cotton.

[0037] (2): 106mg of 1,2,3-propanetricarboxylic acid was dissolved in 60mL of DMF (2547mL / g), magnetically stirred for 30min to obtain solution A; 349mg of Ni(NO 3 )·6H 2 O and 349mg Co(NO 3 ) 2 ·6H 2 O (mass ratio of 1:1) was added to the mixed solution of ethanol and water to obtain solution B; after the cotton obtained in step (1) was soaked in solution A and left to stand for 24 hours, the resulting mixed solution was added to the In solution B, react in a stain...

Embodiment 3

[0040] A preparation method of a wave-absorbing material derived from NiCo-MOF / biomass cotton, comprising the steps of:

[0041] (1): Soak 800mg of cotton in 270mL containing H 2 o 2 (2mol / L), Na 2 SiO 3 (0.02 mol / L) and NaOH (0.25 mol / L) mixed aqueous solution. Soak at 90°C for 1 hour. The soaked cotton was washed 6 times with hot water at 70 °C and deionized water at room temperature to remove impurities, and the obtained product was purified and dried under vacuum at 60 °C to obtain activated cotton.

[0042] (2): 106mg of 1,2,3-propanetricarboxylic acid was dissolved in 60mL of DMF (2547mL / g), magnetically stirred for 30min to obtain solution A; 349mg of Ni(NO 3 )·6H 2 O and 349mg Co(NO 3 ) 2 ·6H 2 O (mass ratio of 1:1) was added to the mixed solution of ethanol and water to obtain solution B; after the cotton obtained in step (1) was soaked in solution A and left to stand for 24 hours, the resulting mixed solution was added to the In solution B, react in a stain...

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PUM

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Abstract

The invention belongs to the technical field of electromagnetic wave absorbing materials, and discloses a wave absorbing material derived from NiCo-MOF / biomass cotton and a preparation method thereof. The preparation process is simple, low in cost and free of pollution, large-scale batch production can be achieved, and the prepared wave-absorbing material is small in density, wide in wave-absorbing frequency band and high in reflection loss. The NiCo@C wave-absorbing material prepared by the method disclosed by the invention has a large specific surface area and a multi-stage pore channel structure, and the electromagnetic wave absorption performance is greatly improved through the synergistic effect among nano-particles, nano-porous carbon and carbon fibers. Therefore, the wave-absorbing material not only paves a way for the development of the biomass as a green, low-cost and renewable high-performance carbon-based wave-absorbing material, but also provides a good design and manufacturing concept for the composite material of the electromagnetic wave-absorbing material.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, a kind of wave absorbing material derived from NiCo-MOF / biomass cotton and a preparation method thereof. Background technique [0002] Due to the excessive use of wireless communication devices, electromagnetic wave pollution has become one of the important problems in daily life, which threatens health, electronic security and national defense security. Therefore, for civil and military purposes, there is an urgent need to develop high-performance electromagnetic wave absorbers. In recent years, due to the advantages of high conductivity, large specific surface area and low density, carbon materials have attracted extensive attention in the field of electromagnetic wave absorption. However, the complex synthesis process, high cost and environmental pollution issues raise the threshold for its practical application. Therefore, there is an urgent need to prepare ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B22F9/24B22F1/16B22F1/054
CPCC01B32/05B22F9/24
Inventor 胡军温慧敏金红都
Owner ZHEJIANG UNIV OF TECH
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