Microcapsule with infrared and radar stealth functions, and preparation method and application thereof

Abstract

The invention discloses a microcapsule with infrared and radar stealth functions, and a preparation method and application thereof. The microcapsule is prepared from, by weight, 8-10 parts of polyacrylonitrile, polyurethane or a mixture of the polyacrylonitrile and the polyurethane, 27 parts of dimethylformamide, 3-6 parts of paraffin, 0.5-2.5 parts of an electromagnetic wave absorbent, 0.1 part of hydroxyl cellulose and 10 parts of deionized water. The phase change material and the electromagnetic wave absorbing material are combined by utilizing a microcapsule technology, so that the defect that the stealth material only has single infrared stealth or radar stealth is overcome. The prepared microcapsule material has infrared and radar stealth functions, is convenient to use, and can be directly sprayed on a military target to obtain a good stealth effect.

Description

technical field

[0001] The invention belongs to the technical field of material engineering, and in particular relates to a microcapsule with both infrared and radar stealth and its preparation method and application. Background technique

[0002] In many military operations, detection technologies such as radar and infrared are usually used to improve target recognition capabilities, so that a single stealth technology cannot meet the demand. Therefore, the development of multifunctional stealth materials has an important market prospect. The current stealth materials often have a single function, and the combination of infrared stealth materials and radar stealth materials is required to meet the multi-functional stealth requirements, and the prepared products are usually thick and heavy. With the development of microcapsule technology and nanotechnology, it is possible to prepare a multifunctional stealth material.

[0003] Nano-ferric oxide, graphene oxide and ferric ox...

Examples

Embodiment 1

[0036] A microcapsule with both infrared and radar stealth, comprising the following raw materials in parts by weight: 8-10 parts of polyacrylonitrile, polyurethane or a mixture of both, 27 parts of dimethylformamide, 3-6 parts of paraffin, 0.5-2.5 Parts of electromagnetic wave absorber, 0.1 part of hydroxycellulose, 10 parts of deionized water.

[0037] The above-mentioned electromagnetic wave absorber is one or more of nanoscale few-layer graphene oxide, ferric oxide, and ferric oxide intercalated graphene.

[0038] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0039] (1) Dissolve 10 g of polyurethane into 15 g of dimethylformamide solvent to prepare solution S1.

[0040] (2) Add 3 g of paraffin, 0.5 g of few-layer graphene oxide, 2 g of ferric oxide, and 0.1 g of hydroxycellulose into 10 g of dimethylformamide solvent, stir and emulsify fully at 50° C. to prepare solution S2.

[0041] (3) Add 5 mL of S2 sol...

Embodiment 2

[0046] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0047] (1) Dissolve 8g of polyacrylonitrile into 15g of dimethylformamide solvent to prepare solution S1.

[0048] (2) 5 g of paraffin, 0.5 g of ferric oxide intercalated graphene oxide, and 0.1 g of hydroxycellulose were added to 10 g of dimethylformamide solvent, and fully stirred and emulsified at 60° C. to prepare solution S2.

[0049] (3) Add 5 mL of S2 solution into 5 mL of S1 solution, and stir thoroughly at 70° C. to obtain a mixed solution S3.

[0050] (4) Dissolve 2 g of dimethylformamide into 10 g of deionized water to prepare solution S4.

[0051] (5) Spray S3 into the S4 solution at 30° C. through a high-pressure, high-temperature sprayer at 80° C. to obtain microcapsule particles.

[0052] After testing, the microcapsule material prepared in this example has a phase change enthalpy as high as 102.1 J / g, and has ultra-low infrared transmittance ...

Embodiment 3

[0054] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0055] (1) Dissolve 10 g of polyurethane into 15 g of dimethylformamide solvent to prepare solution S1.

[0056] (2) Add 6 g of paraffin, 1 g of ferric oxide intercalated graphene oxide, and 0.1 g of hydroxycellulose into 10 g of dimethylformamide solvent, and fully stir and emulsify at 70° C. to prepare solution S2.

[0057] (3) Add 5 mL of S2 solution into 5 mL of S1 solution, and stir thoroughly at 70° C. to obtain a mixed solution S3.

[0058] (4) Dissolve 2 g of dimethylformamide into 10 g of deionized water to prepare solution S4.

[0059] (5) Spray S3 into the S4 solution at 30° C. through a high-pressure, high-temperature sprayer at 80° C. to obtain microcapsule particles.

[0060] After testing, the microcapsule material prepared in this example has a phase change enthalpy as high as 105.1 J / g, and has ultra-low infrared transmittance in the 3-15 μm...

technical field

[0001] The invention belongs to the technical field of material engineering, and in particular relates to a microcapsule with both infrared and radar stealth and its preparation method and application. Background technique

[0002] In many military operations, detection technologies such as radar and infrared are usually used to improve target recognition capabilities, so that a single stealth technology cannot meet the demand. Therefore, the development of multifunctional stealth materials has an important market prospect. The current stealth materials often have a single function, and the combination of infrared stealth materials and radar stealth materials is required to meet the multi-functional stealth requirements, and the prepared products are usually thick and heavy. With the development of microcapsule technology and nanotechnology, it is possible to prepare a multifunctional stealth material.

[0003] Nano-ferric oxide, graphene oxide and ferric ox...

Examples

Embodiment 1

[0036] A microcapsule with both infrared and radar stealth, comprising the following raw materials in parts by weight: 8-10 parts of polyacrylonitrile, polyurethane or a mixture of both, 27 parts of dimethylformamide, 3-6 parts of paraffin, 0.5-2.5 Parts of electromagnetic wave absorber, 0.1 part of hydroxycellulose, 10 parts of deionized water.

[0037] The above-mentioned electromagnetic wave absorber is one or more of nanoscale few-layer graphene oxide, ferric oxide, and ferric oxide intercalated graphene.

[0038] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0039] (1) Dissolve 10 g of polyurethane into 15 g of dimethylformamide solvent to prepare solution S1.

[0040] (2) Add 3 g of paraffin, 0.5 g of few-layer graphene oxide, 2 g of ferric oxide, and 0.1 g of hydroxycellulose into 10 g of dimethylformamide solvent, stir and emulsify fully at 50° C. to prepare solution S2.

[0041] (3) Add 5 mL of S2 sol...

Embodiment 2

[0046] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0047] (1) Dissolve 8g of polyacrylonitrile into 15g of dimethylformamide solvent to prepare solution S1.

[0048] (2) 5 g of paraffin, 0.5 g of ferric oxide intercalated graphene oxide, and 0.1 g of hydroxycellulose were added to 10 g of dimethylformamide solvent, and fully stirred and emulsified at 60° C. to prepare solution S2.

[0049] (3) Add 5 mL of S2 solution into 5 mL of S1 solution, and stir thoroughly at 70° C. to obtain a mixed solution S3.

[0050] (4) Dissolve 2 g of dimethylformamide into 10 g of deionized water to prepare solution S4.

[0051] (5) Spray S3 into the S4 solution at 30° C. through a high-pressure, high-temperature sprayer at 80° C. to obtain microcapsule particles.

[0052] After testing, the microcapsule material prepared in this example has a phase change enthalpy as high as 102.1 J / g, and has ultra-low infrared transmittance ...

Embodiment 3

[0054] A method for preparing microcapsules with both infrared and radar stealth, the specific steps are as follows:

[0055] (1) Dissolve 10 g of polyurethane into 15 g of dimethylformamide solvent to prepare solution S1.

[0056] (2) Add 6 g of paraffin, 1 g of ferric oxide intercalated graphene oxide, and 0.1 g of hydroxycellulose into 10 g of dimethylformamide solvent, and fully stir and emulsify at 70° C. to prepare solution S2.

[0057] (3) Add 5 mL of S2 solution into 5 mL of S1 solution, and stir thoroughly at 70° C. to obtain a mixed solution S3.

[0058] (4) Dissolve 2 g of dimethylformamide into 10 g of deionized water to prepare solution S4.

[0059] (5) Spray S3 into the S4 solution at 30° C. through a high-pressure, high-temperature sprayer at 80° C. to obtain microcapsule particles.

[0060] After testing, the microcapsule material prepared in this example has a phase change enthalpy as high as 105.1 J / g, and has ultra-low infrared transmittance in the 3-15 μm...

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