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Hollow honeycomb flower-shaped manganese dioxide material

A technology of manganese dioxide and honeycomb flowers, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of weak absorption strength, narrow absorption bandwidth, and large quality, achieve wide absorption bandwidth, improve electromagnetic wave absorption performance, and excellent electromagnetic wave absorption performance effect

Inactive Publication Date: 2020-09-18
ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional electromagnetic wave absorbing materials have the disadvantages of weak absorption strength, large mass, and narrow absorption bandwidth, which cannot meet the current requirements of thin thickness, light weight, wide absorption bandwidth, and strong absorption strength.

Method used

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  • Hollow honeycomb flower-shaped manganese dioxide material
  • Hollow honeycomb flower-shaped manganese dioxide material
  • Hollow honeycomb flower-shaped manganese dioxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A hollow honeycomb flower-like manganese dioxide material, the preparation method of which is:

[0028] (1) Weigh 50mg of silicon dioxide and 2mmol of potassium permanganate and add them to 50mL of deionized water for ultrasonic dispersion for 30 minutes. After complete dispersion, add 10mL of 1mol / L hydrochloric acid solution and stir for 30 minutes to transfer to the reaction of polytetrafluoroethylene lining React in the kettle at 160°C for 48 hours, take it out after the reaction is completely cooled to room temperature, wash the product with deionized water, put it in an oven at 60°C, dry it for 12 hours, and collect it to obtain silica @ honeycomb flower-like manganese dioxide.

[0029] (2) Preparation of hollow honeycomb flower-like manganese dioxide: add the silica@honeycomb flower-like manganese dioxide prepared in step (1) to 250mL 2mol / L concentrated sodium hydroxide solution, and mechanically stir the reaction at 70°C After 12 hours, after the reaction was c...

Embodiment 2

[0033] A hollow honeycomb flower-like manganese dioxide material, the preparation method of which is:

[0034](1) Weigh 60mg of silicon dioxide and 1.5mmol of potassium permanganate and add them into 60mL of deionized water for ultrasonic dispersion for 30 minutes. After complete dispersion, add 10mL of 1mol / L hydrochloric acid solution and stir for 30 minutes. React in the reactor at 160°C for 48 hours, take it out after the reaction is completely cooled to room temperature, wash the product centrifugally with deionized water, put it in a 60°C oven and dry it for 12 hours and collect it to obtain silica@Honeycomb Flower Manganese Dioxide .

[0035] (2) Preparation of hollow honeycomb flower-like manganese dioxide: add the silica@honeycomb flower-like manganese dioxide prepared in step (1) to 250mL 2mol / L concentrated sodium hydroxide solution, and mechanically stir the reaction at 70°C After 12 hours, after the reaction was completed and cooled to room temperature, the produ...

Embodiment 3

[0037] A hollow honeycomb flower-like manganese dioxide material, the preparation method of which is:

[0038] (1) Weigh 70mg of silicon dioxide and mmol potassium permanganate and add them to 70mL of deionized water for ultrasonic dispersion for 30 minutes. After complete dispersion, add 10mL of 1mol / L hydrochloric acid solution and stir for 30 minutes to transfer to the reaction of polytetrafluoroethylene lining React in the kettle at 160°C for 24 hours. After the reaction is completely cooled to room temperature, take it out, wash the product with deionized water, put it in an oven at 60°C, dry it for 12 hours, and collect it to obtain silica@honeycomb flower-like manganese dioxide.

[0039] (2) Preparation of hollow honeycomb flower-like manganese dioxide: add the silica@honeycomb flower-like manganese dioxide prepared in step (1) to 25mL 2mol / L concentrated sodium hydroxide solution, and mechanically stir at 70°C for reaction After 12 hours, after the reaction was complet...

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Abstract

The invention discloses a hollow honeycomb flower-shaped manganese dioxide material and an application thereof. The preparation method comprises the steps: (1) preparation of silicon dioxide@honeycombflower-shaped manganese dioxide: ultrasonically dispersing silicon dioxide and potassium permanganate into deionized water, adding a certain amount of hydrochloric acid solution, stirring, transferring into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, reacting for a period of time, performing subsequent treatment after the reaction is finished, and thus obtaining the silicon dioxide@honeycomb flower-shaped manganese dioxide.; and (2) preparation of hollow honeycomb flower-shaped manganese dioxide: adding the silicon dioxide@honeycomb flower-shaped manganese dioxide prepared in the step (1) into a concentrated sodium hydroxide solution, carrying out a stirring reaction at a certain temperature, and carrying out subsequent treatment after the reaction is completed, so as to obtain the hollow honeycomb flower-shaped manganese dioxide. The obtained product manganese dioxide is in a hollow honeycomb flower shape, has the characteristics of light weight, strong lossand wide absorption, and plays a quite important role in application of electromagnetic wave absorption.

Description

technical field [0001] The invention relates to an electromagnetic wave absorbing material, in particular to a hollow honeycomb flower-shaped manganese dioxide material and the application of the electromagnetic wave absorbing material. It belongs to the technical field of electromagnetic wave absorption. Background technique [0002] With the rapid development of electronic information technology in today's society, electromagnetic pollution has gradually adversely affected the normal life of human beings. Electromagnetic wave absorbing material is a material that can absorb and convert electromagnetic wave energy into other forms of energy loss. According to the loss mechanism, it can be divided into three types: dielectric, magnetic loss and conductance. The dielectric type mainly includes oxide semiconductors, nickel oxide etc. The magnetic loss type is mainly metal ferrite, and the conduction type includes carbon-based materials and conductive polymers. [0003] Tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
CPCC01G45/02C01P2004/34C01P2004/61C01P2006/90
Inventor 黄艳兴
Owner ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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