Infrared magnetic phase change material and preparation method thereof

A magnetic phase transition and infrared technology, applied in the preparation of microspheres, materials for heat exchange, magnetic properties of inorganic materials, etc., can solve the problem of difficult to meet the needs of full-time multi-band camouflage, achieve low emissivity, increase application range, reduce Effect of coating thickness

Inactive Publication Date: 2010-10-27
BEIJING JIAOTONG UNIV
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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 is that it is difficult to meet the full-time multi-band camouflage

Method used

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  • Infrared magnetic phase change material and preparation method thereof
  • Infrared magnetic phase change material and preparation method thereof
  • Infrared magnetic phase change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Step 1, weigh 2 grams of modified nano-ferrite, use decane as paraffin, weigh 10 g of paraffin, 10 g of styrene, 1 g of methacrylic acid, 0.08 g of dodecyl mercaptan, 0.8 g of sodium lauryl sulfate, and Azodiisobutyronitrile 0.1g;

[0029] Step 2, uniformly mixing the modified nano-ferrite, paraffin, styrene, methacrylic acid, dodecanethiol and azobisisobutyronitrile at room temperature with magnetic stirring;

[0030] Step 3, adding the weighed sodium lauryl sulfate into 120 g of deionized water, and fully stirring at room temperature until the sodium lauryl sulfate is completely dissolved;

[0031] Step 4, the mixed solution obtained in step 2 is added to the mixed solution obtained in step 3, and fully stirred at room temperature for 0.5 hours;

[0032] Step five, ultrasonic emulsifying the mixed solution obtained in step four under ice bath for 10 minutes;

[0033] Step 6, the mixed solution obtained after step 5 ultrasonication is transferred into a four-neck fla...

Embodiment approach 2

[0043] Step 1, weigh 2 grams of modified nano-ferrite, use octadecane as paraffin, weigh 10 g of paraffin, 10 g of styrene, 0.2 g of methacrylic acid, 0.08 g of dodecyl mercaptan, and 0.2 g of sodium lauryl sulfate , Triton X-1000.2g, azobisisobutyronitrile 0.1g;

[0044] Step 2, uniformly mixing the modified nano-ferrite, paraffin, styrene, methacrylic acid, dodecanethiol and azobisisobutyronitrile at 35° C. by magnetic stirring;

[0045] Step 3, adding the weighed sodium lauryl sulfate and Triton X-100 into 120 g of deionized water, and fully stirring at 35° C. until the two substances are completely dissolved;

[0046] Step 4, the mixed solution obtained in step 2 is added to the mixed solution obtained in step 3, and fully stirred at 35° C. for 0.5 hours;

[0047] Step five, ultrasonic emulsifying the mixed solution obtained in step four under ice bath for 10 minutes;

[0048] Step 6, the mixed solution obtained after step 5 ultrasonication is transferred into a four-nec...

Embodiment approach 3

[0059] Step 1, weigh 2 grams of modified nano-ferrite, use hexadecane as paraffin, weigh 10 g of paraffin, 10 g of styrene, 0.5 g of methacrylic acid, 0.2 g of dodecyl mercaptan, and 0.1 g of sodium lauryl sulfate , Triton X-1000.2g, azobisisobutyronitrile 0.2g;

[0060] Step 2, uniformly mixing the modified nano-ferrite, paraffin, styrene, methacrylic acid, dodecanethiol and azobisisobutyronitrile at 45°C with magnetic stirring;

[0061] Step 3, adding the weighed sodium lauryl sulfate and Triton X-100 into 120 g of deionized water, and fully stirring at 45° C. until the two substances are completely dissolved;

[0062] Step 4, the mixed solution obtained in step 2 is added to the mixed solution obtained in step 3, and fully stirred at 45° C. for 0.5 hours;

[0063] Step five, ultrasonic emulsifying the mixed solution obtained in step four under ice bath for 10 minutes;

[0064] Step 6, the mixed solution obtained after step 5 ultrasonication is transferred into a four-neck...

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Abstract

The invention relates to an infrared magnetic phase change material, which belongs to an optoelectronic material. The structure of the infrared magnetic phase change material is as follows: an inner shell (2) is a copolymer of styrene and methacrylic acid, an outer shell (1) is made of conductive polyaniline, a core material B is paraffin (4), and a core material A is modified nano-ferrite (3). Apreparation method comprises the following steps: mixing ferrite, paraffin, styrene, methacrylic acid, lauryl mercaptan and azodiisobutyronitrile according to a certain proportion; dissolving a certain amount of lauryl sodium sulfate and Triton X-100 in deionized water; mixing the two kinds of solution for emulsification, filling nitrogen, heating and mixing; after 6 hours, breaking emulsion, leaching, washing, drying, mixing the obtained powder with aniline monomer and dilute hydrochloric acid according to a certain proportion, reducing the temperature, and dropping hydrochloric acid solution containing a certain amount of ammonium persulfate; and after 6 hours, leaching, washing and drying, thereby obtaining the final product. The invention integrates three functions within one material, i.e. microwave absorption, temperature control and reduction of infrared emission, and solves the problem that various materials are needed in the conventional multi-band protection.

Description

technical field [0001] The invention relates to an optoelectronic material and a preparation method thereof. It is suitable for the field of heat exchange, temperature control, electromagnetic protection and military fields, such as aerospace, building materials, thermal storage and temperature-adjusting textiles, electromagnetic shielding and infrared stealth, etc. Background technique [0002] Stealth coatings under military conditions are often required to be multi-spectrum compatible, that is, not only require stealth under radar wave conditions, but also reduce the chance of being discovered under infrared or even laser conditions. Stealth materials for a single band are a big challenge. For the stealth of radar waves, magnetic absorption and electric absorption are usually used, and two different loss types of different materials are used to achieve the purpose of stealth; for infrared stealth, there are two ways to reduce the probability of being discovered, one is t...

Claims

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Application Information

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IPC IPC(8): C09K5/02C09K3/00H01F1/10B01J13/14
Inventor 王永生何大伟鞠长滨高磊富鸣
Owner BEIJING JIAOTONG UNIV
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