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Modified hollow microsphere and application thereof

A hollow microsphere and hollow microbead technology, which is applied in the preparation of microspheres, microcapsule preparations, coatings, etc., can solve the problems of high areal density and narrow absorption band.

Inactive Publication Date: 2014-07-16
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional electromagnetic wave absorbers are mainly metal and ferrite micro-powder materials, most of which have shortcomings such as high surface density and narrow absorption frequency band. "Thin, light, wide, and strong" is the direction for the development of absorbers to high efficiency, light weight and composite

Method used

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  • Modified hollow microsphere and application thereof
  • Modified hollow microsphere and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A kind of aluminum modified hollow microsphere composite coating

[0026] (1) Preparation of Aluminum Modified Hollow Microspheres

[0027] 1) Pretreatment of hollow microspheres: 20 g of hollow ceramic microspheres were placed in a mixed cleaning reagent, washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads into 5% hydrofluoric acid solution to roughen them for 5 minutes, then filter them with suction, wash them repeatedly with deionized water, and dry them. The mixed cleaning reagent is: every liter of mixed cleaning reagent contains 50g NaOH, 15g NaOH 2 CO 3 , 15g Na 3 PO 4 and 5g Na 2 SiO 3 , and the balance is water.

[0028] 2) Modification of the hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 200 ml of 0.25 mol / L aluminum sulfate solution at a constant rate, adjust the pH of the soluti...

Embodiment 2

[0041] Embodiment 2: A kind of aluminum modified hollow microsphere composite coating

[0042] (1) Preparation of Aluminum Modified Hollow Microspheres

[0043] 1) Pretreatment of hollow microspheres: 20 g of hollow ceramic microspheres were placed in a cleaning reagent (50 g / L NaOH solution), washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads into 5% hydrofluoric acid solution to roughen them for 5 minutes, then filter them with suction, wash them repeatedly with deionized water, and dry them.

[0044] 2) Modification of hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 0.25 mol / L aluminum sulfate and 0.5 mol / L sodium silicate solution (aluminum sulfate mixed with sodium silicate to obtain an aluminum silicate solution), the pH of the solution was adjusted to 4 with ammonia water, and the stirring was continued for 2 h...

Embodiment 3

[0055] Embodiment 3: A kind of zinc modified hollow microsphere composite coating

[0056] (1) Preparation of zinc-modified hollow microspheres

[0057] 1) Pretreatment of hollow microspheres: 20 g of hollow glass microspheres and hollow ceramic microspheres were placed in a mixed cleaning reagent, washed at room temperature for 2 hours, rinsed repeatedly with deionized water, and then dried. Add the cleaned hollow ceramic microbeads to 5% hydrofluoric acid solution to roughen them for 1 min, then filter them with suction, rinse them repeatedly with deionized water, and dry them. The mixed cleaning reagent is: every liter of mixed cleaning reagent contains 50g NaOH and 15g NaOH 2 CO 3 , and the balance is water.

[0058] 2) Modification of the hollow microspheres: soak 5 g of the pretreated hollow microspheres obtained in step 1) in 200 mL of distilled water, add 200 ml of 0.25 mol / L zinc nitrate solution at a constant rate, and adjust the pH of the solution with urea to be...

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Abstract

The invention relates to a modified hollow microsphere and application thereof. A hollow microsphere serving as a carrier is subjected to roughening pretreatment, and then proper metal oxide is selected to modify the hollow microsphere in a chemical precipitation way, and the modified hollow microsphere is mixed with a proper organic coating to prepare a composite coating with an infrared ray shielding function. Therefore, the aims of stealth compatibility with visible light and reduction in infrared emission of a coating can be fulfilled.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a modified hollow microsphere with infrared absorption / shielding function and application thereof. Background technique [0002] The development and application of microwave-absorbing materials have greatly affected the development of military stealth and civilian anti-radiation. At present, the absorbing materials being used and developed at home and abroad include: ferrite, metal powder, polycrystalline iron fiber, nanofiber, conductive polymer, retinyl Schiff base salt and so on. Traditional electromagnetic wave absorbers are mainly metal and ferrite micro-powder materials, most of which have shortcomings such as high surface density and narrow absorption frequency band. "Thin, light, wide, and strong" is the direction for the development of absorbers to high efficiency, light weight and composite . Infrared rays are electromagnetic waves with wavelengths betwe...

Claims

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Application Information

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IPC IPC(8): B01J13/02C09D7/12
Inventor 邓慧余喜理
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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