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Modified graphene phase change microcapsule and preparation method thereof

A phase change microcapsule, graphene technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of phase change enthalpy reduction, phase change material leakage, etc., and achieve high encapsulation rate and uniform particle size distribution. , the effect of avoiding leakage problems

Inactive Publication Date: 2017-06-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: the purpose of this invention is to provide a kind of modified graphene phase change microcapsule and preparation method thereof, this phase change microcapsule uses modified graphene directly as the wall material of microcapsule as heat conduction enhancing material, has solved The addition of thermal conductivity enhancement materials to the core material leads to the reduction of phase change enthalpy, and solves the leakage problem of phase change materials during application, and the preparation method of the modified graphene phase change microcapsules is simple and the reaction conditions are mild

Method used

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  • Modified graphene phase change microcapsule and preparation method thereof
  • Modified graphene phase change microcapsule and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Step 1, add 0.1g sodium dodecylsulfonate (SDBS) into 150ml deionized water, stir to obtain SDBS aqueous solution;

[0031] Step 2: Melt 10 g of sliced ​​paraffin and add it to the aqueous solution in step 1. Under the condition of 55° C., 150 W ultrasonic wave for 2 hours to obtain sliced ​​paraffin emulsion;

[0032] Step 3, disperse 0.01g of modified graphene into 150ml of deionized water, then add hydrochloric acid with a concentration of 0.1mol / L to adjust the pH of the solution to 1, and then 100W ultrasonic for 10min to obtain a modified graphene solution;

[0033] Step 4, the modified graphene solution obtained in step 3 is added to the sliced ​​paraffin emulsion obtained in step 2, and 100W is ultrasonicated for 10 minutes, and the ultrasonic wave makes the wall material and the core material combine through the electrostatic force between charges to obtain a phase change wrapped in modified graphene microcapsule preparation;

[0034] Step 5, cooling the modifi...

Embodiment 2

[0036] Step 1, adding 0.5 g of succinate sulfonate to 150 ml of deionized water, and stirring to obtain an aqueous solution of succinate sulfonate;

[0037] Step 2: Melt 10 g of myristyl alcohol and add it to the aqueous solution in step 1. Under the condition of 58° C., 120 W ultrasound for 2.5 hours to obtain myristyl alcohol emulsion;

[0038] Step 3, disperse 0.1g of modified graphene into 150ml of deionized water, add hydrochloric acid with a concentration of 0.01mol / L to adjust the pH of the solution to 2, and then 120W ultrasonic for 30min to obtain a modified graphene solution;

[0039] In step 4, the modified graphene solution obtained in step 3 is added to the myristyl alcohol emulsion obtained in step 2, and 120W is ultrasonicated for 30 minutes, and the ultrasonic wave makes the wall material and the core material combine through the electrostatic force between the charges to obtain the phase wrapped in modified graphene. Variable microcapsule preparation;

[0040...

Embodiment 3

[0042] Step 1, add 0.8g fatty alcohol sulfate monoethanolamine salt into 150ml deionized water, and stir to obtain fatty alcohol sulfate monoethanolamine salt solution;

[0043] Step 2: Melt 10 g of cetyl alcohol and add it to the aqueous solution in step 1. Under the condition of 58 ° C, 130 W ultrasound for 2.5 hours to obtain cetyl alcohol emulsion;

[0044] Step 3, disperse 0.2 g of modified graphene into 150 ml of deionized water, add a hydrochloric acid solution with a concentration of 0.001 mol / L to a pH of 3, and then 130 W ultrasonic for 40 min to obtain a modified graphene solution;

[0045] Step 4, the modified graphene solution obtained in step 3 is added to the cetyl alcohol emulsion obtained in step 2, and 130W is ultrasonicated for 40 minutes, and the ultrasonic wave makes the wall material and the core material combine through the electrostatic force between charges to obtain the phase wrapped by modified graphene. Variable microcapsule preparation;

[0046] S...

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Abstract

The invention discloses a modified graphene phase change microcapsule and a preparation method thereof, the microcapsule is regularly-spherical, and has a core-shell structure, the core-shell structure comprises a wall material, a core material and an emulsifier for connecting the wall material and the core material, wherein the wall material is modified graphene, the core material is a phase change material, and the mass ratio of the emulsifier, the modified graphene and the phase change material is (0.1-1.0): (0.01-0.5): 10. The modified graphene is prepared by reduction of graphene oxide with ethylenediamine, the emulsifier, the modified graphene and the phase change material are mixed, and the modified graphene-coated phase change microcapsule is prepared by ultrasonic chemistry-method. The preparation method of the phase change microcapsule is simple, the preparation cycle is short, the microcapsule morphology is regularly-spherical, the wall material is used less, and the thermal conductivity is strong.

Description

technical field [0001] The invention relates to a modified graphene phase-change microcapsule and a preparation method thereof, belonging to the field of phase-change material microcapsules. [0002] technical background [0003] The rapid growth of the global economy has increased human demand for energy, and the depletion of fossil energy is inevitable. Therefore, reducing dependence on fossil fuels, improving energy efficiency, and developing environmentally friendly materials are important issues facing human beings. [0004] Because phase change energy storage materials can absorb or release a large amount of heat during the phase change process, they can play a role in temperature control and energy storage, and can solve the contradiction between energy supply and demand in time and space. effective means of utilization. Although phase change materials have broad application prospects, most phase change materials will have problems such as volume change, corrosion, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14
CPCC09K5/063C09K5/14
Inventor 李敏马秋阁
Owner SOUTHEAST UNIV
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