Hydrated salt-porous material composite based on hydrogel coating and its preparation method and application

A technology of porous materials and hydrated salts, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of high process cost and performance attenuation, achieve cheap and easy raw materials, reduce damage rate, and ensure long-term stability Effect

Active Publication Date: 2022-05-13
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a hydrogel-based energy storage system aimed at the technical defects of high process cost and performance attenuation in the long-term ap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] Example 1

[0061] According to the weight ratio of 87:1:12, calcium chloride hexahydrate (as a hydrated salt), nucleating agent strontium chloride hexahydrate and expanded graphite (as a porous material), expanded graphite particle size of 100 mesh, mixed evenly, melted calcium chloride hexahydrate phase change material at a temperature of 40 °C ~ 50 °C, so that it is uniformly absorbed by the expanded graphite, cooled to room temperature (or below 25 °C) to obtain calcium chloride hexahydrate phase change material - expanded graphite complex.

[0062] Prepare a hydrogel containing 0.05wt% vitamin (as an antioxidant), 10wt% sodium carboxymethyl cellulose, a hydrogel with a residual amount of water, mix the prepared hydrogel and calcium chloride hexahydrate phase change material - expanded graphite complex, hydrogel and calcium chloride hexahydrate phase change material - expanded graphite complex mass ratio of 15:85, high-speed stirring to make it fully mixed, careful contr...

Example Embodiment

[0067] Example 2

[0068] According to the weight ratio of 78.5: 1.5: 20 weigh the sodium sulfate decahydrate phase change material (as a hydrated salt), the nucleating agent borax and expanded vermiculite (as a porous material), the expanded vermiculite particle size is 200 mesh, mixed uniformly, melt the sodium sulfate decahydrate phase change material at a temperature of 50 ° C ~ 60 ° C, so that it is uniformly absorbed by the expanded vermiculite, cooled to room temperature (below 25 ° C), and then the sodium suctahydrate phase change material - expanded vermiculite complex is obtained for backup.

[0069]Xanthan gum, glucose and sodium montmorillonite and the prepared sodium sucphate phase change material - expanded vermiculite complex grinding and mixing, xanthan gum, glucose, sodium montmorillonite and sodium stahydrate phase change material - expanded vermiculite complex the mass ratio of 4:0.05:4:37; after full mixing, add an appropriate amount of water, stir to gel, hyd...

Example Embodiment

[0074] Example 3

[0075] According to the weight ratio of 50:50 weigh magnesium chloride hexahydrate and calcium chloride hexahydrate (as a hydrated salt), preparation of magnesium chloride hexahydrate - calcium chloride hexahydrate hydrate salt phase change material (as a porous material), according to the weight ratio of 83: 2:15 weighed magnesium chloride hexahydrate - calcium chloride hexahydrate hydrate salt phase change material, nucleating agent barium hydroxide octahydrate and porous carbon, porous carbon particle size of 400 mesh, mixed evenly, at a temperature of 40 ° C ~ 50 ° C, so that the hydrated salt phase change material is uniformly absorbed by porous carbon, fully absorbed, cooled to 20 °C or less, Magnesium chloride hexahydrate - calcium chloride hexahydrate - porous carbon complex was obtained.

[0076]Prepare a hydrosol containing 15wt% silica, 1wt% nano metal zinc powder and 5wt% polyacrylic acid, mixed with magnesium chloride hexahydrate - calcium chloride...

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Abstract

The invention discloses a hydrated salt-porous material composite based on hydrogel coating and its preparation method and application. The hydrogel system is completely covered on the outside of the hydrated salt-porous material composite. The hydrated salt- The porous material composite includes a porous material and a hydrated salt system adsorbed in the open pores of the porous material, and the hydrated salt exposed at the open end of the open channel and the hydrogel in the hydrogel system have a salting-out effect in situ An insoluble precipitate formed, plugging the open end. The hydrogel endows the hydrated salt-porous material composite with good plasticity and elasticity, and effective heat absorption and release cycle stability.

Description

technical field [0001] The invention relates to the technical field of phase-change energy storage materials, in particular to a hydrogel-coated hydrated salt-porous material composite and its preparation method and application. Background technique [0002] Phase change energy storage technology is to use materials to absorb or release a large amount of heat energy during the phase change process, thereby playing the role of temperature control and energy storage, which can solve the contradiction between energy supply and demand in terms of time and space distribution imbalance, and is an important way to improve energy efficiency. Effective means of utilizing efficiencies. It has important application value and broad application prospects in many fields such as aerospace, solar energy utilization, industrial waste heat recovery, heating and air conditioning, medical engineering, military engineering, thermal storage buildings and extreme environment clothing. The composi...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 孙进贺王明勇贾永忠景燕邵斐张鹏瑞谢绍雷
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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