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Preparation method of orderly porous matrix shaping composite phase change material

A technology of composite phase change materials and phase change core materials, which is applied in the field of preparation of ordered porous base shape-fixed composite phase change materials, can solve the problems of poor adjustability of porous carriers, poor compatibility of core materials, and large pore size, etc., to achieve enhanced circulation Stable, non-corrosive, high porosity effect

Inactive Publication Date: 2014-07-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the development of an ordered porous matrix shape-setting composite phase change material with high thermal performance, good compatibility and easy regulation can effectively overcome the poor adjustability of existing porous carriers, large and disordered pores, and poor compatibility with core materials. It is of great significance for the effective utilization and application promotion of phase change materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0018] First, use P123 (molecular weight 5800) as the surfactant, prepare a uniform solution with a mass percentage concentration of 3% in the aqueous solution, then add hydrochloric acid to adjust the pH value to 5, stir magnetically in an oil bath at 40°C for 6 hours until clear, and then drop Add tetraethyl orthosilicate, the molar ratio of tetraethyl orthosilicate to surfactant P123 is 5:1, continue to stir the solution for 12 hours, then transfer it to the reaction kettle, then age it in a blast drying oven at 110°C for 24 hours, and cool it down After reaching room temperature, it was filtered, washed with deionized water, dried, and calcined at 450° C. for 6 hours to obtain an ordered mesoporous silica carrier material.

[0019] Dissolve lithium chromate in a certain volume of deionized water and stir at 30°C for 2 hours to form a homogeneous solution. Vacuumize the ordered mesoporous silica carrier material prepared in the previous step for 3 hours at 150°C to open the...

Embodiment example 2

[0021] First, use P123 (molecular weight 5800) as the surfactant, prepare a uniform solution with a mass percentage concentration of 6% in the aqueous solution, then add hydrochloric acid to adjust the pH value to 4, stir magnetically in an oil bath at 40°C for 6 hours until clear, and then drop Add tetraethyl orthosilicate, the molar ratio of tetraethyl orthosilicate to surfactant P123 is 4:1, continue to stir the solution for 12 hours, transfer it to the reaction kettle, then age it in a blast drying oven at 120°C for 24 hours, and cool it down After reaching room temperature, it was filtered, washed with deionized water, dried, and calcined at 550° C. for 4 hours to obtain an ordered mesoporous silica carrier material.

[0022] Sodium nitrate was dissolved in a certain volume of deionized water and stirred at 40°C for 3 hours to form a homogeneous solution. Vacuumize the ordered mesoporous silica carrier material prepared in the previous step at 130°C for 4 hours, open the ...

Embodiment example 3

[0024] First use P123 (molecular weight 5800) as the surfactant, prepare a uniform solution with a mass percentage concentration of 4% in the aqueous solution, then add hydrochloric acid to adjust the pH value to 5, stir magnetically in an oil bath at 50°C for 4 hours until clear, and then drop Add tetraethyl orthosilicate, the molar ratio of tetraethyl orthosilicate to surfactant P123 is 3, continue to stir the solution for 12 hours, then transfer it to the reaction kettle, then age in a blast drying oven at 90°C for 18 hours, and cool to room temperature After filtering, washing with deionized water, drying, and calcining at 500° C. for 4 hours, an ordered mesoporous silica carrier material was obtained.

[0025] Dissolve calcium chloride hexahydrate in a certain volume of absolute ethanol and stir at 90°C for 2 hours to form a homogeneous solution. Vacuumize the ordered mesoporous silica carrier material prepared in the previous step at 120°C for 5 hours, open the pores and...

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Abstract

The invention provides a preparation method of an orderly porous matrix shaping composite phase change material, and belongs to the field of a composite phase change material. The preparation method comprises the following steps: firstly preparing an orderly mesoporous silica carrier, and designing, adjusting and controlling the porous-channel structure, pore size and surface property of the carrier; secondly, using a phase change core material for preparing corresponding liquor, dispersing the prepared porous carrier in prepared phase change core material liquor, adsorbing the phase change core material by using the relatively strong capillary action, surface tension and the like of the porous carrier material so as to realize the high-efficiency filling of the core material in combination of the bonding effects of functional groups on the surface of the carrier on the core material, and drying so as to obtain the composite phase change material with relatively good heat storage capacity and relatively high stability. The composite phase change material has the advantages that the carrier is large in specific surface area, high in porosity and small in pore diameter, has orderly porous-channels and strong immobilization capacity on the phase change core material and is difficult to leak, the filling quantity of the core material is large, and the composite phase change material is high in energy storage density, good in heat stability, widely applied, difficult to burn, green and safe in use.

Description

technical field [0001] The invention belongs to the field of composite phase-change materials, and in particular relates to a preparation method of ordered porous-based shape-fixed composite phase-change materials. Background technique [0002] Replacing traditional fossil energy with solar energy, wind energy, geothermal energy, ocean energy, etc. is the only way for sustainable energy development. However, these new energy sources have low energy density and are greatly affected by weather, geographical location, and time. They often have shortcomings such as intermittent, randomness, and volatility, resulting in a mismatch between energy supply and demand in terms of time, space, and intensity. Energy efficient The utilization rate is low, resulting in huge waste. Therefore, how to realize the reasonable and efficient utilization of new energy through advanced technical means has become a difficult problem in the large-scale application of new energy. Phase change energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 冯妍卉张欣欣张晓伟马倩倩王静静钟丽敏冯黛丽
Owner UNIV OF SCI & TECH BEIJING
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