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Modified carbon dioxide shaped phase change material and preparation method thereof

A phase-change energy storage material, silicon dioxide technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of poor durability of materials, easy phase separation or precipitation, etc., and achieve good application value , Enhanced thermal conductivity, good dispersion performance

Active Publication Date: 2015-08-12
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, many literatures use the doping method and physical adsorption method to prepare composite phase change materials with high thermal conductivity. Due to the large density difference between the additive material and the matrix material, when the phase change material heat storage melts into a liquid phase, Millimeter or micron-sized solid particles are easy to precipitate in the mixed solution, and they are prone to phase separation or precipitation when they are used repeatedly. The durability of the material is not enough, which limits its application.

Method used

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  • Modified carbon dioxide shaped phase change material and preparation method thereof
  • Modified carbon dioxide shaped phase change material and preparation method thereof
  • Modified carbon dioxide shaped phase change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Graphene-modified silica-coated n-octadecane phase-change energy storage material and its preparation

[0043] Mix 150mL of concentrated sulfuric acid and 50mL of concentrated nitric acid in proportion to make a mixed acid, add 5g of graphene into the mixed acid solution, then control the temperature at 100°C, react for 30min, stop heating, and wait for the reactant to cool to room temperature, then mix the mixture obtained from the above reaction Add deionized water to wash and filter repeatedly until the lotion is neutral, and the product obtained after drying is 4.9g, and 4.9g of the product is mixed with 50mL of SOCl containing 0.1gN,N-dimethylformamide 2 Mix, reflux at 80°C for 12 hours, centrifuge at 4000rmp, collect the precipitate, discard the liquid substance, wash the solid substance repeatedly with tetraoxyfuran to remove by-products, place it in a vacuum oven for 12 hours, and add to 200mL after drying Stir and disperse in toluene, add 10g of 3-ami...

Embodiment 2

[0048] Example 2 Carbon nanotube modified silica coated polyethylene glycol phase change energy storage material and its preparation

[0049] Mix 150mL of concentrated sulfuric acid and 50mL of concentrated nitric acid in proportion to make a mixed acid, add 5g of carbon nanotubes into the mixed acid solution, then control the temperature at 100°C, react for 30min, stop heating, and wait for the reactants to cool to room temperature Deionized water was added to the mixture to wash and filter repeatedly until the washing liquid was neutral, and 4.9 g of the product obtained after drying was mixed with 50 mL of SOCl containing 0.1 g N,N-dimethylformamide 2 Mix, reflux at 80°C for 12 hours, centrifuge at 4000rmp, collect the precipitate, discard the liquid substance, wash the solid substance repeatedly with tetraoxyfuran to remove by-products, place it in a vacuum oven for 12 hours, and add it to In 200mL of toluene, stir and disperse, add 10g of 3-aminopropyltriethoxysilane drop...

Embodiment 3

[0054] Example 3 Carbon nanotube modified silica coated palmitic acid phase change energy storage material and its preparation

[0055] Mix 150mL of concentrated sulfuric acid and 50mL of concentrated nitric acid in proportion to make a mixed acid, add 5g of carbon nanotubes into the mixed acid solution, then control the temperature at 100°C, react for 30min, stop heating, and wait for the reactants to cool to room temperature Deionized water was added to the mixture to wash and filter repeatedly until the washing liquid was neutral, and 4.9 g of the product obtained after drying was mixed with 50 mL of SOCl containing 0.1 g N,N-dimethylformamide 2 Mix, reflux at 80°C for 12 hours, centrifuge at 4000rmp, collect the precipitate, discard the liquid substance, wash the solid substance repeatedly with tetraoxyfuran to remove by-products, place it in a vacuum oven for drying for 12 hours, and add it to 200mL of toluene , stir and disperse, add 10g of 3-aminopropyltriethoxysilane d...

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Abstract

The invention belongs to the field of energy storage materials and particularly relates to a modified carbon dioxide shaped phase change material and a preparation method thereof. The energy storage material comprises the following components in percentage by weight: 10-90wt% of an organic phase change material and 10-90wt% of a chemical bond bonded carbon material modified carbon dioxide supporting material, wherein the structure of the chemical bond bonded carbon material modified carbon dioxide supporting material is shown in a general formula (I) shown in the description, R is CnH2n straight chain saturated alkyl bonded with a carbon atom, n is greater than or equal 2 but less than or equal to 5, and n is an integer; Carbon represents the carbon material. The energy storage material provided by the invention has the advantages of great energy storage density and high stability, is suitable for the field of energy-saving building materials, solar energy storage and utilization, industrial waste heat recovery and the like, and has a broad application prospect.

Description

technical field [0001] The invention belongs to the field of energy storage materials, and in particular relates to a modified silicon dioxide shaped phase change material and a preparation method thereof. Background technique [0002] Phase change energy storage has the advantage of high energy storage density, which can realize energy transfer and utilization in different time and space, and can solve the problem of mismatch between energy supply and demand in terms of time, space and intensity. With the intensification of the energy crisis, the powerful countries in Europe, America and Japan regard the development of phase change energy storage materials as an important strategy for future development. For the purpose of saving energy, they develop phase change energy storage materials for the utilization of solar and wind energy and waste heat recovery. After continuous efforts Development, gradually extended to construction, chemical industry, aerospace, electronics and...

Claims

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Application Information

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IPC IPC(8): C09K5/02
Inventor 鄢冬茂李付刚蔡文蓉
Owner SHENYANG RES INST OF CHEM IND
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