A method to prepare the phase-change material wrapped by microcapsule

A technology of phase change materials and microcapsules, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., and can solve the problem that it is difficult to meet the needs of full-band camouflage

Inactive Publication Date: 2009-10-07
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: it is difficult to meet the needs of full-

Method used

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  • A method to prepare the phase-change material wrapped by microcapsule
  • A method to prepare the phase-change material wrapped by microcapsule
  • A method to prepare the phase-change material wrapped by microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] Concrete steps of a preparation method of a microcapsule-coated phase-change material:

[0031] Step 1, weigh 5g of paraffin, 15g of methyl methacrylate; 0.1g of ethylene glycol dimethacrylate, 0.2g of methacrylic acid, 0.2g of sodium lauryl sulfate, 0.3g of potassium persulfate, ferrite 0.6g, 80g deionized water;

[0032] Step 2, adding sodium lauryl sulfate to deionized water and heating to 50°C;

[0033] Step 3, adding ferrite and heated and melted paraffin to the solution in step 3;

[0034] Step 4, using an ultrasonic cell pulverizer, after ultrasonic emulsification for 5 minutes, adding methyl methacrylate, ethylene glycol dimethacrylate and methacrylic acid;

[0035] Step 5, after ultrasonic emulsification for 5 minutes, move the obtained mixture solution into a four-neck flask with mechanical stirring, condenser, argon inlet and feed port;

[0036] Step 6: After passing argon gas to remove oxygen for 0.5 hours, heat in a water bath to 70° C., add potassium pe...

Embodiment approach 2

[0041] Concrete steps of a preparation method of a microcapsule-coated phase-change material:

[0042] Step 1, weigh 5g of paraffin, 15g of methyl methacrylate; 0.1g of ethylene glycol dimethacrylate, 0.2g of methacrylic acid, 0.2g of sodium lauryl sulfate, 0.3g of potassium persulfate, ferrite 0.2g, 80g deionized water;

[0043] Step 2, adding sodium lauryl sulfate into deionized water and heating to 50°C;

[0044] Step 3, adding the ferrite and the ferrite to the solution in step 3 after heating and melting;

[0045] Step 4, using an ultrasonic cleaner, ultrasonic emulsification for 15 minutes, adding methyl methacrylate, ethylene glycol dimethacrylate and methacrylic acid;

[0046] Step 5, after ultrasonic emulsification for 10 minutes, move the obtained mixture solution into a four-neck flask with mechanical stirring, condenser, nitrogen inlet and feeding port;

[0047] Step 6: After passing nitrogen gas to remove oxygen for 0.5 hours, heat in a water bath to 70°C, add ...

Embodiment approach 3

[0050] Concrete steps of a preparation method of a microcapsule-coated phase-change material:

[0051] Step 1, weigh 5g of paraffin, 15g of methyl methacrylate; 0.1g of ethylene glycol dimethacrylate, 0.2g of methacrylic acid, 0.2g of sodium lauryl sulfate, 0.3g of potassium persulfate, ferrite 3g, 80g deionized water;

[0052] Step 2, adding sodium lauryl sulfate into deionized water and heating to 50°C;

[0053] Step 3, adding ferrite and heated and melted paraffin to the solution in step 3;

[0054] Step 4, using ultrasonic cell pulverizer, ultrasonic emulsification for 5 minutes, adding methyl methacrylate, ethylene glycol dimethacrylate and methacrylic acid;

[0055] Step 5, after ultrasonic emulsification for 5 minutes, move the obtained mixture solution into a four-neck flask with mechanical stirring, condenser, argon inlet and feed port;

[0056] Step 6: After passing argon gas to remove oxygen for 0.5 hours, heat in a water bath to 70° C., add potassium persulfate ...

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Abstract

A method to prepare the phase-change material wrapped by microcapsule, wherein, 1. Weigh paraffin and methyl methacrylate (MMA) at a mass ratio of 1:3; 2. Weigh 0.5% glycol dimethacrylate (GDMA), 1% methacrylic acid (MAA) and 1% sodium dodecyl sulfate (SDS), 1.5% potassium persulfate, 1%-15% ferrite and 400% deionized water (to the total mass of Item 1); 4. Add ferrite and molten paraffin into the solution of Item 3; 5. Emulsify the solution under ultrasonic sound and add MMA, GDMA and MAA; 6. Re-emulsify and transfer the obtained solution into a device with mechanical agitation, condenser tube, gas inlet and feed inlet; 7. Aerate and remove oxygen 0.5h, heat it in water bath to 70 DEG C, add potassium persulfate and cool the solution to room temperature to obtain the phase-change material wrapped by microcapsule. The material is used in such fields as building, heat-storing temperature-adaptable textile, and electronic equipment.

Description

technical field [0001] The invention relates to an optoelectronic material and a preparation method thereof. It is suitable for fields such as aerospace, machinery manufacturing, building materials, thermal storage and temperature-adjusting textiles, and electronic equipment. Background technique [0002] The current research has a problem that is difficult to overcome in theory: when a single phase change material is used in target camouflage, from the perspective of temperature control, for a target in the heating section or a target with a heat source inside, it can be adjusted to delay the temperature rise by absorbing heat, delaying the infrared radiation of the target. The exposure of the characteristics; but for the protection of ground radar, because it has no loss to electromagnetic waves, the target is easily exposed under the detection of radar. Therefore, it is difficult to use a single phase change material for infrared stealth camouflage in protective engineer...

Claims

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Application Information

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IPC IPC(8): C09K5/02H01F1/10B01J13/02
Inventor 王永生何大伟杜玙璠富鸣
Owner BEIJING JIAOTONG UNIV
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