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Preparation method of ultrathin paper-base wave-absorbing material

An absorbing material, paper-based technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem that the performance of advanced absorbing materials is difficult to meet the comprehensive requirements of thin, light, wide and strong, and the electromagnetic matching of absorbing materials is poor, etc. It can improve the electromagnetic performance, the shielding performance is durable, and the preparation process is simple.

Inactive Publication Date: 2017-12-01
赵顺全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the current wave-absorbing materials are difficult to meet the comprehensive requirements of advanced wave-absorbing materials "thin, light, wide and strong" in terms of performance due to their relatively poor electromagnetic matching, the present invention provides a A kind of preparation method of ultra-thin paper-based wave-absorbing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 1g of multi-walled carbon nanotubes, add 150mL of nitric acid solution with a mass fraction of 65%, and stir the reaction at 100r / min for 5h under a constant temperature oil bath at 110°C. After standing for 1h, add water to dilute to 3L, and then filter to obtain a filter residue. Wash the filter residue with deionized water until the washing liquid is neutral, then place the filter residue in a drying oven, and dry it to constant weight at 60°C to obtain pretreated multi-walled carbon nanotubes; weigh 0.8g of pretreated multi-walled carbon nanotubes tube, add 800mL deionized water, and disperse with 300W ultrasonic wave for 1h to obtain the pretreated multi-walled carbon nanotube dispersion, then use 10% hydrochloric acid to adjust the pH of the pretreated multi-walled carbon nanotube dispersion to 3, and add 0.16g of ferric chloride, 0.13g of cobalt chloride, 0.06g of nickel chloride, stirred at 300r / min for 1h to obtain the precursor body fluid; 10% ammonia wat...

example 2

[0021] Weigh 2 g of multi-walled carbon nanotubes, add 220 mL of nitric acid solution with a mass fraction of 65%, stir and react at 110 r / min for 6 h in a constant temperature oil bath at 115 °C, let stand for 2 h, add water to dilute to 4 L, and then filter to obtain a filter residue. Wash the filter residue with deionized water until the washing liquid is neutral, then place the filter residue in a drying oven, and dry it to constant weight at 65°C to obtain pretreated multi-walled carbon nanotubes; weigh 1.0 g of pretreated multi-walled carbon nanotubes tube, add 1000mL deionized water, and disperse with 300W ultrasonic wave for 2h to obtain the pretreated multi-walled carbon nanotube dispersion, then use 10% hydrochloric acid to adjust the pH of the pretreated multi-walled carbon nanotube dispersion to 4, and add 0.20g of ferric chloride, 0.17g of cobalt chloride, 0.08g of nickel chloride, stirred at 350r / min for 2h to obtain the precursor body fluid; 10% ammonia water was...

example 3

[0024] Weigh 2g of multi-walled carbon nanotubes, add 300mL of nitric acid solution with a mass fraction of 65%, stir and react at 120r / min for 6h in a constant temperature oil bath at 120°C, let it stand for 2h, add water to dilute to 5L, and then filter to obtain a filter residue. Wash the filter residue with deionized water until the washing liquid is neutral, then place the filter residue in a drying oven, and dry it to constant weight at 70°C to obtain pretreated multi-walled carbon nanotubes; weigh 1.2g of pretreated multi-walled carbon nanotubes tube, add 1200mL deionized water, and disperse with 300W ultrasonic wave for 2 hours to obtain the pretreated multi-walled carbon nanotube dispersion, then use 10% hydrochloric acid to adjust the pH of the pretreated multi-walled carbon nanotube dispersion to 4, and add 0.24g ferric chloride, 0.20g cobalt chloride, 0.10g nickel chloride, stirred at 400r / min for 2h to obtain the precursor body fluid; dropwise add 10% ammonia water...

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Abstract

The invention relates to a preparation method of an ultrathin paper-base wave-absorbing material, belonging to the technical field of electromagnetic shielding. The preparation method comprises the following steps: acidifying a multi-walled carbon nanotube which serves as a carrier by virtue of concentrated nitric acid to generate oxygen-containing groups on the surface of the carbon nanotube so as to provide depositing sites for cobalt-nickel-iron ions; carrying out hydrothermal reaction to uniformly embed cobalt-nickel ferrite nano-particles into the carbon nanotube by virtue of an electrostatic attraction effect between the metal ions and the oxygen-containing groups so as to effectively improve electromagnetic performance and generate a cobalt-nickel ferrite / carbon nanotube with a good wave-absorbing effect; and finally, dispersing the cobalt-nickel ferrite / carbon nanotube and regenerated paper fibers into a turbid liquid in a high-speed shearing dispersion machine, manufacturing wet paper with pulp, carrying out compaction to remove moisture, flatting a paper web, drying, and carrying out press polishing to increase the smoothness of the paper so as to obtain the ultrathin paper-base wave-absorbing material. The ultrathin paper-base wave-absorbing material has good electromagnetic matching property, is capable of effectively absorbing and inhibiting secondarily-emitted noise waves and has high high-frequency electromagnetic wave shielding performance.

Description

technical field [0001] The invention relates to a preparation method of an ultra-thin paper-based wave-absorbing material, belonging to the technical field of electromagnetic shielding. Background technique [0002] In the past ten years, with the rapid development and wide application of electronic and communication equipment using GHz frequency electromagnetic waves, the resulting electromagnetic interference and radiation pollution have become more and more serious. At the same time, the demand for electromagnetic stealth in modern weapons and equipment is also increasing. In order to eliminate or reduce electromagnetic interference and pollution, and reduce the radar scattering interface of military targets to improve their survivability and penetration capabilities, the development of new high-performance electromagnetic wave absorbing materials has been highly valued. As we all know, the absorbing performance of electromagnetic wave absorbing materials is mainly determ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 吴建杨阳
Owner 赵顺全
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