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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 application process in the preparation process of the hydrated salt-porous material composite phase change energy storage system in the prior art. Glue-coated hydrated salt-porous material composite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0062] Prepare a hydrogel containing 0.05wt% vitamin (as an antioxidant), 10wt% sodium carboxymethylcellulose, and the balance is water, mix the prepared hydrogel and calcium chloride hexahydrate phase change material-expanded graphite composite The mass ratio of hydrogel to calcium chloride hexahydrate phase-change material-expanded graphite composite is 15:85. Stir at high speed to make it fully mixed. Carefully contr...

Embodiment 2

[0068] Take by weighing sodium sulfate decahydrate phase-change material (as hydrated salt), nucleating agent borax and expanded vermiculite (as porous material) according to weight ratio 78.5:1.5:20, the expanded vermiculite particle size is 200 orders, mix uniformly, in 50 Melt the sodium sulfate decahydrate phase change material at a temperature of ℃~60℃, so that it is uniformly and fully absorbed by the expanded vermiculite, and after cooling to room temperature (below 25℃), the sodium sulfate decahydrate phase change material-expanded vermiculite composite is obtained spare.

[0069] Grinding and mixing xanthan gum, glucose and sodium montmorillonite with the prepared sodium sulfate decahydrate phase change material-expanded vermiculite composite, xanthan gum, glucose, sodium montmorillonite and sodium sulfate decahydrate phase change material -The mass ratio of the expanded vermiculite compound is 4:0.05:4:37; after fully mixing, add an appropriate amount of water, stir ...

Embodiment 3

[0075] Weigh magnesium chloride hexahydrate and calcium chloride hexahydrate (as hydrated salt) according to a weight ratio of 50:50 to prepare magnesium chloride hexahydrate-calcium chloride hexahydrate hydrated salt phase change material (as a porous material), according to a weight ratio of 83:2 : 15 Weigh magnesium chloride hexahydrate-calcium chloride hexahydrate hydrated salt phase change material, nucleating agent barium hydroxide octahydrate and porous carbon. The particle size of porous carbon is 400 mesh. The hydrated salt phase change material is uniformly and fully absorbed by the porous carbon, and cooled to below 20° C. to obtain magnesium chloride hexahydrate-calcium chloride hexahydrate-porous carbon composite.

[0076] Prepare the hydrosol containing 15wt% silicon dioxide, 1wt% nano metal zinc powder and 5wt% polyacrylic acid, mix with magnesium chloride hexahydrate-calcium chloride hexahydrate-porous carbon composite, the mass ratio of hydrosol and composite i...

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PUM

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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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