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Preparation method of aromatic polyamide core-shell paraffin phase change microcapsule

A technology of phase change microcapsules and polyaramides, applied in the directions of microcapsule preparation, microsphere preparation, etc., can solve the problems of high manufacturing cost and low coating rate, and achieve low manufacturing cost, high coating rate and high density. sexual effect

Inactive Publication Date: 2011-03-02
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently developed paraffin phase-change microcapsules have the following main problems: high manufacturing cost, low coating rate, and slow-release properties of the capsule wall

Method used

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  • Preparation method of aromatic polyamide core-shell paraffin phase change microcapsule
  • Preparation method of aromatic polyamide core-shell paraffin phase change microcapsule
  • Preparation method of aromatic polyamide core-shell paraffin phase change microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The interfacial polymerization reaction equation is shown below.

[0035]

[0036] Specific steps are as follows:

[0037] Step 1, preparing 300 mL of an aqueous phase solution with an emulsifier OP-15 mass percent concentration of 1.5%, and heating to 40°C;

[0038] Step 2, take 3 g of ethylenediamine (EDA) and dissolve it in 30 g of deionized water.

[0039] Step 3, weigh 7.2g of 30# phase-change paraffin and heat to 40°C, add 0.8g of trimesoyl chloride (TMC), and stir to dissolve it completely;

[0040] Step 4, add the above-mentioned paraffin wax solution containing TMC dropwise to the aqueous phase solution prepared in step 1, and emulsify using a high-speed shear homogenizing emulsifier at the emulsification speed of 9000r / min, after emulsifying for 5s, the organic amine aqueous solution Add it into the reaction system, keep the stirring speed constant, and react for 1min;

[0041] Step 5, the solution prepared by step 4 is continued to react for 30min at a ...

Embodiment 2

[0047] The interfacial polymerization reaction equation is shown below.

[0048]

[0049] Specific steps are as follows:

[0050] Step 1, preparing 300 mL of an aqueous phase solution with an emulsifier OP-15 mass percent concentration of 0.5%, and heating to 40°C;

[0051] Step 2, take 6 g of ethylenediamine (EDA) and dissolve it in 30 g of deionized water.

[0052] Step 3, weigh 7g of 30# phase-change paraffin and heat to 40°C, add 1g of trimesoyl chloride (TMC), and stir to dissolve it completely;

[0053] Step 4, add the above-mentioned paraffin wax solution containing TMC dropwise to the aqueous phase solution prepared in step 1, and emulsify using a high-speed shear homogenizing emulsifier at the emulsification speed of 5000r / min, after emulsifying for 5s, the organic amine aqueous solution Add it into the reaction system, keep the stirring speed constant, and react for 3 minutes;

[0054] Step 5, the solution prepared by step 4 is continued to react for 30min at a s...

Embodiment 3

[0059] The interfacial polymerization reaction equation is shown below.

[0060]

[0061] Specific steps are as follows:

[0062] Step 1, prepare emulsifier OP-15 mass percentage concentration of 2%, polyvinyl alcohol mass percentage concentration of 1% aqueous phase solution 300mL, heat to 70 ° C;

[0063] Step 2, take 4.5g of ethylenediamine (EDA) and dissolve it in 30g of deionized water.

[0064] Step 3, weigh 7.2g of 58# phase-change paraffin and heat it to 70°C, add 0.9g of trimesoyl chloride (TMC), and stir to dissolve it completely;

[0065] Step 4, add the above-mentioned paraffin solution containing TMC dropwise to the aqueous phase solution prepared in step 1, and emulsify with a high-speed shear homogenizing emulsifier at the emulsification speed of 7000r / min. Add it into the reaction system, keep the stirring speed constant, and react for 1min;

[0066] Step 5, the solution prepared by step 4 is continued to react for 30min at a stirring speed of 300r / min; ...

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Abstract

The invention relates to a preparation method of an aromatic polyamide core-shell paraffin phase change microcapsule, belonging to the field of preparation of the paraffin phase change microcapsule, and aiming to provide a preparation method of the paraffin phase change microcapsule of which the product has good heat resistance, chemical stability and compactness. In the method, trimesoyl chloride is adopted as an oil phase monomer, organic amine--ethylene diamine or piperazine is adopted as a water phase monomer, and the wall material of the prepared paraffin phase change microcapsule is cross-linking aromatic polyamide. The product microcapsule prepared by the technology of the invention does not contain autopolymer of a cyst wall material, the microcapsules do not adhere to each other, and a monodisperse state can be formed in a substrate easily. The coating ratio of the microcapsule is as high as 87.7%. The microcapsule prepared by the technology of the invention has no slow release, and the 5% thermo gravimetric temperature is 220 DEG C. The aromatic polyamide core-shell paraffin phase change microcapsule prepared by the technology of the invention can be applied to the fields of thermal-storage thermo-regulated fiber, solar energy and nuclear energy utilization, enhanced heat transfer, electronics, spaceflight and composite materials.

Description

technical field [0001] The invention relates to a preparation method of paraffin phase change microcapsules. It can be used in high-tech fields such as thermal storage and temperature-regulating fibers, solar and nuclear energy utilization, enhanced heat transfer, electronics, aerospace, and composite materials. Background technique [0002] Phase change energy storage materials are one of the hotspots in energy utilization and materials research at home and abroad in recent years. Phase change materials have the advantages of high energy storage density and close to constant temperature during the phase change process, and have broad application prospects. [0003] Solid-liquid phase change materials such as paraffin have problems such as leakage, phase separation, volume expansion, and corrosion when used. The use of microencapsulation technology to coat solid-liquid phase change materials is expected to solve the above problems and increase Heat transfer area for improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16C08G69/26C08L77/06
Inventor 魏菊刘向高明
Owner DALIAN POLYTECHNIC UNIVERSITY
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