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Shaped phase change energy storage material and preparation method thereof

A phase change energy storage material and a phase change material technology, which are applied in the field of shaped phase change energy storage materials and their preparation, can solve the problems of limited adsorption effect, leakage of phase change materials, etc., so as to improve service life, improve toughness, reduce cost effect

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite phase change energy storage material prepared by the invention has a high thermal conductivity and a wide temperature range, but with expanded vermiculite as the carrier, its adsorption to the molten phase change material belongs to the physical adsorption process, that is, it mainly relies on the combination of intermolecular forces , its adsorption effect is limited, and after repeated use, it is prone to unfavorable phenomena such as leakage of phase change materials

Method used

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  • Shaped phase change energy storage material and preparation method thereof
  • Shaped phase change energy storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Take 100g of pseudo-boehmite, 5g of magnesium hydroxide, 50g of diatomaceous earth, 50g of quicklime and 200g of deionized water, and grind them in an agate grinder at 180°C and 850rpm for 2.3h to obtain a colloidal precursor. Get 50g of the colloidal precursor and transfer it to a stainless steel automatic reactor with a polytetrafluoroethylene liner, add 1.75g ​​of polyetheramine and 1.75g ​​of tetrabutylammonium bromide, and stir at 350rpm for 30min to seal the reactor. The reaction was carried out at ℃ for 75h to obtain a solid. Then, the obtained solid was vacuum-dried at a vacuum degree of 1200 Pa, and the drying time and temperature were 20 h and 120° C., respectively. Then weigh 30g of carrier and 60g of capric acid, stir and react at 60°C and 260rpm for 90min, and dry the obtained solid product at 50°C and 12h, respectively, to obtain a shaped phase change energy storage material.

Embodiment 2

[0040] Take 100g of pseudo-boehmite, 2g of magnesium hydroxide, 20g of diatomaceous earth, 20g of quicklime and 100g of deionized water, and grind them in an agate grinder at 160°C and 700rpm for 2h to obtain a colloidal precursor. Get 50g of the colloidal precursor and transfer it to a stainless steel automatic reactor with a polytetrafluoroethylene liner, add 1.0g of polyetheramine and 1.0g of tetrabutylammonium bromide, and stir at 300rpm for 25min to seal the reactor. ℃ under the reaction 60h. Then, the obtained solid was vacuum-dried at a vacuum degree of 800 Pa, and the drying time and temperature were 10 h and 60° C., respectively. Then weigh 30g of carrier and 15g of capric acid, stir and react at 55°C and 200rpm for 30min, and dry the obtained product at 45°C and 10h, respectively, to obtain a shaped phase change energy storage material.

Embodiment 3

[0042] Take 100g of pseudo-boehmite, 8g of magnesium hydroxide, 80g of diatomaceous earth, 80g of quicklime and 450g of deionized water, and grind them in an agate grinder at 200°C and 900rpm for 3h to obtain a colloidal precursor. Get 50g of the colloidal precursor and transfer it to a stainless steel automatic reactor with a polytetrafluoroethylene liner, add 2.5g of polyetheramine and 2.5g of tetrabutylammonium bromide, and stir the reactor at 500rpm for 45min to seal the reactor at 700 Reaction at ℃ for 80h. Then, the obtained solid product was subjected to vacuum drying treatment, the vacuum degree was 1300 Pa, and the drying time and temperature were 30 h and 150° C., respectively. Then weigh 30g of carrier and 105g of capric acid, keep stirring at 75°C and 300rpm for 180min, and dry the obtained product at 65°C and 20h, respectively, to obtain a shaped phase change energy storage material.

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Abstract

The preparation method comprises the following steps: mixing an aluminum source, a magnesium source, a silicon source, a calcium source and water in proportion, and grinding at 120-240 DEG C to obtain a colloidal precursor; transferring into a reaction kettle, adding an auxiliary agent in proportion, stirring for a period of time, sealing the reaction kettle, and reacting at 400-800 DEG C to obtain a solid matter; performing vacuum drying treatment to obtain a carrier; and mixing the carrier and the phase change material in proportion, carrying out stirring reaction at 55-75 DEG C, and carrying out drying treatment to obtain the shaped phase change energy storage material. The carrier of the three-dimensional network structure is prepared from various mineral substances and the modification additive, and the phase change material is immobilized in the carrier in a chemical reaction mode, so that the heat conductivity coefficient of the phase change energy storage material is improved, leakage of the phase change material after repeated use is avoided, and the service life of the phase change material is prolonged.

Description

technical field [0001] The invention belongs to the technical field of phase change energy storage materials, and in particular relates to a shaped phase change energy storage material and a preparation method thereof. Background technique [0002] Phase change energy storage materials achieve the purpose of heat transfer and storage by absorbing and releasing latent heat of phase change through the change of phase change material lattice or phase, and play the role of "shaving peaks and filling valleys". Phase change materials generally have a large heat storage density, and because the material can maintain a certain temperature during the phase change, it is easier to realize the temperature control of the system, and the chemical stability and safety are high. It has gradually become the frontier research direction of energy science, especially new energy research. [0003] Although phase change energy storage materials and latent heat energy storage technology have adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 赵亮刘野王岩陈益民于庆志党雷
Owner CHINA PETROLEUM & CHEM CORP
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