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Phase-change material microcapsule with photo-thermal conversion and energy storage properties and preparation method

A phase change material and light-to-heat conversion technology, which is applied in the field of preparation of phase-change material microcapsules, can solve the problems that microcapsules are difficult to achieve high encapsulation rate and excellent light-to-heat conversion performance at the same time, and achieve the effect of shape stability

Active Publication Date: 2021-04-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a phase change material microcapsule with both light-to-heat conversion and energy storage properties and a preparation method to solve the problem of existing phase-change materials with both light-to-heat conversion and energy storage properties It is difficult for microcapsules to achieve high encapsulation efficiency and excellent photothermal conversion performance at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Octacane as a phase change material

[0027] Step 1: Weigh 42.0g of glycidyl methacrylate, 0.54g of 1,1-stilbene and 480mL of deionized water. Nitrogen gas was introduced, and the reaction was carried out at 200 rpm for 10 minutes in a water bath at 80°C. Afterwards, 0.09 g of potassium persulfate was weighed and dissolved in 120 mL of deionized water, and added to the reaction system to continue polymerization under nitrogen atmosphere for 18 hours. The resulting transparent product was distilled and dialyzed for one week to obtain a concentrated 1,1-stilbene-terminated hydrolyzed polyglycidyl methacrylate (D-PGMA) solution.

[0028] Step 2. Weigh 1.0g of the D-PGMA solution obtained in step 1, 1.5g of divinylbenzene purified and deblocked by a basic alumina column, 1.0g of octadecane, 20mg of MXene, 15g of deionized water, 70°C Under the water bath, 4000rpm high-speed shear emulsification for 1 hour. Afterwards, nitrogen gas was introduced, and the react...

Embodiment 2

[0029] Example 2: Sliced ​​paraffin as a phase change material

[0030] Step 1: Weigh 42.0g of glycidyl methacrylate, 0.54g of 1,1-stilbene and 480mL of deionized water. Nitrogen gas was introduced, and the reaction was carried out at 200 rpm for 10 minutes in a water bath at 80°C. Afterwards, 0.09 g of potassium persulfate was weighed and dissolved in 120 mL of deionized water, and added to the reaction system to continue polymerization under nitrogen atmosphere for 18 hours. The resulting transparent product was distilled and dialyzed for one week to obtain a concentrated 1,1-stilbene-terminated hydrolyzed polyglycidyl methacrylate (D-PGMA) solution.

[0031] Step 2. Weigh 1.0g of the D-PGMA solution obtained in step 1, 1.5g of divinylbenzene purified and deblocked by basic alumina column, 1.0g of section paraffin, 40mg of MXene, 15g of deionized water, in a water bath at 60°C , 4000rpm high-speed shear emulsification for 1 hour. Afterwards, nitrogen gas was introduced, and...

Embodiment 3

[0032] Example 3: octadecane as a phase change material

[0033] Step 1: Weigh 42.0g of glycidyl methacrylate, 0.54g of 1,1-stilbene and 480mL of deionized water. Nitrogen gas was introduced, and the reaction was carried out at 200 rpm for 10 minutes in a water bath at 80°C. Afterwards, 0.09 g of potassium persulfate was weighed and dissolved in 120 mL of deionized water, and added to the reaction system to continue polymerization under nitrogen atmosphere for 18 hours. The resulting transparent product was distilled and dialyzed for one week to obtain a concentrated 1,1-stilbene-terminated hydrolyzed polyglycidyl methacrylate (D-PGMA) solution.

[0034] Step 2. Weigh 1.0g of the D-PGMA solution obtained in step 1, 1.5g of divinylbenzene purified and deblocked by a basic alumina column, 1.0g of octadecane, 50mg of MXene, 15g of deionized water, in a 50°C water bath Under 4000rpm high-speed shear emulsification for 1 hour. Afterwards, nitrogen gas was introduced, and the rea...

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Abstract

The invention relates to a phase-change material microcapsule with photo-thermal conversion and energy storage properties and a preparation method. A microcapsule core is a phase-change material withheat storage capacity; the wall material is of a multi-wall structure, and a polydivinylbenzene high polymer shell layer is arranged in the wall material and is mainly used for packaging the phase-change material; an MXene shell layer is arranged outside and can be used for improving the encapsulation efficiency and the heat storage capacity of the microcapsule and endowing the microcapsule with aphotothermal conversion effect. According to the preparation method, a one-pot method is adopted to prepare the novel phase-change material microcapsule in a system in which amphiphilic macromolecule1, 1-stilbene-terminated polyglycidyl methacrylate and MXene coexist synergistically and stably. The microcapsule with the multi-wall structure is stable in shape and high in encapsulation rate, hasrelatively high latent heat storage density and excellent photothermal conversion performance, and greatly enriches the application of the phase-change material microcapsule in the fields of solar energy utilization and the like.

Description

technical field [0001] The invention belongs to a preparation method of phase-change material microcapsules, and relates to a phase-change material microcapsule with photothermal conversion and energy storage properties and a preparation method. The capsule core of the microcapsule is a phase change material, the inner capsule wall is a polydivinylbenzene polymer shell, and the outer capsule wall is a MXene shell. The multi-wall structure microcapsule has high encapsulation efficiency, high thermal energy storage density and light-to-heat conversion efficiency. Background technique [0002] With the continuous growth of the world population and the continuous consumption of energy, the problem of energy shortage is becoming more and more obvious. As one of the most promising renewable energy sources, improving its storage technology and utilization efficiency has become an inevitable development trend. The use of new phase-change composite materials for solar energy convers...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/14C09K5/06
CPCB01J13/02B01J13/14C09K5/063Y02E70/30
Inventor 张秋禹蒙美玉刘锦陈志聪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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