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Preparation method of multi-wall-structured microcapsule with compatible infrared and radar stealth functions

A technology of microcapsule and wall structure, which is applied in the field of preparation of infrared radar compatible stealth multi-wall structure microcapsules, can solve the problems of poor compatibility between infrared stealth and radar stealth effects, and achieve the effect of enhancing the stealth ability

Active Publication Date: 2020-02-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the poor compatibility between infrared stealth and radar stealth effects of microcapsules prepared by existing methods, the present invention provides a method for preparing infrared radar compatible stealth multi-wall structure microcapsules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Octacane is used as a phase change material, Mxene is used as a dielectric loss absorbing layer, and titanium dioxide is used as an infrared reflective layer

[0017] Step 1. Weigh 1.5g octacosane, 1g polyvinylpyrrolidone, and 5ml Mxene aqueous dispersion, add to 100ml distilled water, emulsify in a water bath at 65°C for 30 minutes, add 0.5g toluene diisocyanate, 0.8 g trimethylolpropane trimercapto propionate and 20 μl triethylamine, continue to react for 15 minutes, and centrifuge and wash the product to obtain single-wall microcapsules.

[0018] Step 2. Disperse the single-walled microcapsules obtained in Step 1 into 100ml of an aqueous solution with pH=9, add 1.62g of ferric chloride and 1.36g of ferrous sulfate heptahydrate, and react in a water bath at 80°C under a nitrogen atmosphere at 200rpm After 30 minutes, the product was centrifuged and washed to obtain double-walled microcapsules.

[0019] Step 3. Disperse the double-walled microcapsules obtai...

Embodiment 2

[0020] Example 2: sliced ​​paraffin wax for biology as a phase change material, graphene oxide as a dielectric loss absorbing layer, and tin dioxide as an infrared reflective layer

[0021] Step 1. Weigh 2g of paraffin wax for biological slices, 1g of polyvinylpyrrolidone, and 10ml of graphene oxide aqueous dispersion, add them to 100ml of distilled water, emulsify in a water bath at 60°C for 30 minutes, and add 0.5g of toluene diisocyanate , 0.8g trimethylolpropane trimercapto propionate and 20 μl triethylamine, continue to react for 15 minutes, the product is centrifuged and washed to obtain single wall microcapsules.

[0022] Step 2. Disperse the single-walled microcapsules obtained in Step 1 into 100ml of an aqueous solution with pH=9, add 1.62g of ferric chloride and 1.36g of ferrous sulfate heptahydrate, and react in a water bath at 80°C under a nitrogen atmosphere at 200rpm After 30 minutes, the product was centrifuged and washed to obtain double-walled microcapsules. ...

Embodiment 3

[0024] Example 3: Eicosane as a phase change material, Mxene as a dielectric loss absorbing layer, and titanium dioxide as an infrared reflective layer

[0025] Step 1. Weigh 2.5g of eicosane, 1g of polyvinylpyrrolidone, and 5ml of the aqueous dispersion of Mxene, add it to 100ml of distilled water, emulsify in a water bath at 40°C for 30 minutes, add 0.5g of toluene diisocyanate, 0.8g Trimethylolpropane trimercapto propionate and 20 μl of triethylamine were reacted for 15 minutes, and the product was centrifuged and washed to obtain single-wall microcapsules.

[0026] Step 2. Disperse the single-walled microcapsules obtained in Step 1 into 100ml of an aqueous solution with pH=9, add 1.62g of ferric chloride and 1.36g of ferrous sulfate heptahydrate, and react in a water bath at 80°C under a nitrogen atmosphere at 200rpm After 30 minutes, the product was centrifuged and washed to obtain double-walled microcapsules.

[0027]Step 3. Disperse the double-walled microcapsules obta...

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Abstract

The invention discloses a preparation method of a multi-wall-structured microcapsule with compatible infrared and radar stealth functions. The invention aims to solve the technical problem of poor compatibility between infrared stealth effect and radar stealth effect of microcapsules prepared by using conventional methods. According to a technical scheme in the invention, the preparation method comprises the following steps: coating a capsule core with a dielectric loss wave-absorbing layer by utilizing a click reaction; then carrying out coating of a magnetic loss wave-absorbing layer by utilizing a chemical coprecipitation method; and finally, conducting coating of an infrared reflecting layer by utilizing a sol-gel method so as to obtain the phase-change microcapsule with a three-layerwall structure. Thus, microwaves and infrared radiation can be reflected multiple times in a capsule wall, and the infrared and radar stealth capability of the microcapsule is enhanced. The dielectricloss wave-absorbing layer and the magnetic loss wave-absorbing layer jointly absorb electromagnetic waves through the synergistic effect of a dielectric loss wave-absorbing material and a magnetic nanomaterial; and one part of heat energy generated by conversion is directly absorbed by the internal phase change material core, and the other part of the heat energy is reflected to the phase changematerial of the capsule core by the outermost infrared reflecting layer and is absorbed and stored again, so the compatibility of infrared stealth effect and radar stealth effect is achieved.

Description

technical field [0001] The invention relates to a preparation method of microcapsules, in particular to a preparation method of infrared radar compatible stealth multi-wall structure microcapsules. Background technique [0002] With the rapid development of modern weapon systems, various detection technologies such as radar, infrared, and sound waves have developed rapidly, posing a serious threat to military facilities and weaponry. Stealth technology, also known as "low detectable technology", is to reduce the detectable information characteristics of one's own targets through research and use of various technical means to achieve the purpose of "invisibility". Among various detection technologies, radar and infrared are the most important and common two. Therefore, it is of great practical significance to develop infrared radar compatible stealth materials. [0003] Radar detection technology detects targets by emitting electromagnetic waves to targets and receiving refl...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/22
CPCB01J13/02B01J13/22
Inventor 张秋禹陈志聪刘锦杨裕民
Owner NORTHWESTERN POLYTECHNICAL UNIV
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