Phase change gel for sunlight photo-thermal conversion, and preparation method thereof

A light-to-heat conversion and solar light technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve problems such as difficulty in utilization

Inactive Publication Date: 2021-11-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intensity of solar energy is limited by time, and its energy can only be used during the day and on sunny days. It is relatively difficult to use it at night or on cloudy days, and the use of intermittent and discontinuous solar radiation energy is also a severe challenge.

Method used

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  • Phase change gel for sunlight photo-thermal conversion, and preparation method thereof
  • Phase change gel for sunlight photo-thermal conversion, and preparation method thereof
  • Phase change gel for sunlight photo-thermal conversion, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Carry out chemical surface modification to MWCNT, first carry out acidification treatment to MWCNT, introduce hydroxyl and carboxyl functional group on MWCNT, modification method is as follows:

[0047] 10g MWCNT was placed in 40mL of mixed acid of concentrated nitric acid and concentrated sulfuric acid, the volume ratio of concentrated nitric acid and concentrated sulfuric acid was 1:3, and ultrasonicated at 50°C for 6h to obtain 10.11g MCNT-COOH.

[0048] (2) Take 87g of 1-stearyl alcohol, add it into 50mL of tetrahydrofuran, stir until it is completely dissolved, then add 13g of block copolymer-SEBS to it to completely dissolve in the solution, and obtain a phase change solution.

[0049] (3) After adding 10.11 g of surface-modified MWCNTs into the above-mentioned phase change solution, ultrasonic vibration was performed for 5 min, so that the MWCNTs could be more uniformly dispersed in the solution.

[0050] (4) Get the above solution and transfer it to an open ...

Embodiment 2

[0057] (1) Carry out chemical surface modification to MWCNT, first carry out acidification treatment to MWCNT, introduce hydroxyl and carboxyl functional group on MWCNT, modification method is as follows:

[0058] 5g MWCNT was placed in 40mL of mixed acid of concentrated nitric acid and concentrated sulfuric acid, the volume ratio of concentrated nitric acid and concentrated sulfuric acid was 1:3, and ultrasonicated at 50°C for 6h to obtain 5.3g MCNT-COOH.

[0059] (2) Weigh 87g of n-eicosane, add it into 50mL of tetrahydrofuran, stir until it is completely dissolved, then add 13g of block copolymer-SEBS to it and completely dissolve in the solution to obtain a phase change solution.

[0060] (3) After adding 5.3 g of surface-modified MWCNTs into the above-mentioned phase change solution, oscillate ultrasonically for 5 min, so that the graphene oxide can be more uniformly dispersed in the solution.

[0061] (4) Get the above solution and transfer it to an open beaker. In a fum...

Embodiment 3

[0068] (1) Carry out chemical surface modification to MWCNT, first carry out acidification treatment to MWCNT, introduce hydroxyl and carboxyl functional group on MWCNT, modification method is as follows:

[0069] 1g MWCNT was placed in 40mL of mixed acid of concentrated nitric acid and concentrated sulfuric acid, the volume ratio of concentrated nitric acid and concentrated sulfuric acid was 1:3, and ultrasonicated at 50°C for 6h to obtain 1.1g MCNT-COOH.

[0070] (2) Take 80 g of 1-tetradecyl alcohol, add it into 50 mL of tetrahydrofuran, stir until it is completely dissolved, and then add 20 g of block copolymer-SEBS to it to completely dissolve in the solution to obtain a phase change solution.

[0071] (3) After adding 1.1 g of surface-modified MWCNTs into the above-mentioned phase change solution, oscillate ultrasonically for 5 min, so that the MWCNTs can be more uniformly dispersed in the solution.

[0072] (4) Get the above solution and transfer it to an open beaker. I...

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Abstract

The invention discloses a phase change gel for sunlight photo-thermal conversion, and a preparation method thereof. The preparation method comprises the following steps: dissolving a phase change material into an organic solvent, adding a porous support material, and completely dissolving to obtain a phase change solution; adding a surface-modified photo-thermal conversion material into the phase change solution, and uniformly dispersing the photo-thermal conversion material in the phase change solution through a physical means; and heating to remove the organic solvent in the phase change solution to obtain the phase change gel with the photo-thermal conversion performance. The phase change gel prepared by the invention is applied to the field of sunlight photothermal conversion, and direct energy conversion is carried out by combining heat storage of the phase change gel with thermoelectric power generation.

Description

technical field [0001] The invention belongs to the technical field of phase-change materials, and relates to a phase-change gel, in particular to a phase-change gel for solar light-to-heat conversion and a preparation method thereof. Background technique [0002] With the gradual development of society, people's demand for energy is increasing day by day. Fossil energy is non-renewable, and its development is close to saturation. Therefore, renewable clean energy has become the focus of people's research. As the most abundant, renewable and environmentally friendly energy source, solar energy is most likely to become a substitute for traditional fossil fuels. However, the intensity of solar energy is limited by time, and its energy can only be used during the day and on sunny days, and it is relatively difficult to use it at night or on cloudy days. The use of intermittent and discontinuous solar radiation energy is also a severe challenge. Phase change materials have spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/06
Inventor 林鹏程刘杏茹盛鑫鑫陈颖
Owner GUANGDONG UNIV OF TECH
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