A kind of hydrated sulfate composite phase change material and preparation method thereof

A composite phase change material and sulfate technology, which is applied in the field of hydrated sulfate composite phase change materials and its preparation, can solve the problems of weak temperature sensitivity and narrow phase transition temperature range, and achieve high phase transition latent heat and phase transition temperature wide range of effects

Active Publication Date: 2020-09-11
江苏金合能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hydrated sulfate phase change materials have the disadvantages of narrow phase change temperature range and weak temperature sensitivity

Method used

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  • A kind of hydrated sulfate composite phase change material and preparation method thereof
  • A kind of hydrated sulfate composite phase change material and preparation method thereof
  • A kind of hydrated sulfate composite phase change material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Accurately weigh 18g of aluminum sulfate octadecahydrate, 10.5g of ammonium aluminum sulfate dodecahydrate and 1.5g of potassium aluminum sulfate dodecahydrate and mix manually, and then add 0.15g of white clay, 0.3g of carboxymethylcellulose and 0.6g of graphite. Put the above mixture into a ball mill tank, add 4ml of deionized water to carry out wet ball milling for 1 hour, control the speed of the ball mill to 15-25 rpm, put the mixture A obtained by ball milling into a reaction kettle, melt and stir at 110°C for 0.5 h, after adding 0.6 g of potassium hydroxide thereto, continue stirring for 0.5 h to adjust and maintain the pH between 3 and 4 to obtain molten mixture B. The molten mixture B was lowered to 60°C in the reaction kettle and continued to stir for about 1 hour to complete the recrystallization to obtain the solid mixture C. After that, it was washed and purified with deionized water for 3 times, each time using 72ml of deionized water, and then dried at 60°...

Embodiment 2

[0042] Accurately weigh 16.5g of aluminum sulfate octadecahydrate, 9g of ammonium aluminum sulfate dodecahydrate and 4.5g of potassium aluminum sulfate dodecahydrate and mix manually, then add 0.15g of clay, 0.3g of carboxymethylcellulose and 0.6g of graphite. Put the above mixture into a ball mill tank and add 4ml of deionized water to carry out wet ball milling for 1 hour, control the speed of the ball mill to 15-25 rpm, put the mixture A obtained by ball milling into a reaction kettle, melt and stir at 120°C for 0.5 h, after adding 0.9 g of potassium hydroxide thereto, continue stirring for 0.5 h to adjust and maintain the pH between 3 and 4 to obtain molten mixture B. The molten mixture B was lowered to 65°C in the reaction kettle and continued to stir for about 1 hour to complete the recrystallization to obtain the solid mixture C. After that, it was washed and purified with deionized water for 3 times, each time using 72ml of deionized water, and then dried at 60°C Obtai...

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Abstract

The invention discloses a medium and low-temperature hydrated sulfate composite phase change material and a preparation method thereof. The medium and low-temperature hydrated sulfate composite phasechange material is prepared from the following raw materials of 55 to 60% of aluminum sulfate octadecahydrate, 30 to 35% of aluminum ammonium dodecahydrate and 5 to 15% aluminum potassium dodecahydrate, wherein the total mass of the hydrated sulfate is 100%; the hydrated sulfate comprises the following components in total mass: 0.2 to 0.5% of nucleation agent, 0.5 to 1.5% of thickener, and 1 to 2%of heat conduction agent. The medium and low-temperature hydrated sulfate composite phase change material has the advantages that the composite hydrated system containing aluminum sulfate octadecahydrate, aluminum ammonium dodecahydrate and aluminum potassium dodecahydrate is used for the first time; by controlling the ratio of the components, the initial phase change temperature can be reduced to about 58 DEG C, the controllable phase change temperature range is wide, and the phase change potential heat is high; by adjusting the pH (potential of hydrogen) value of the melting mixture to 3 to4, the acid corrosion to a packaging container by the composite material is reduced, and the stability of the composite phase change material is maintained.

Description

technical field [0001] The invention relates to a hydrated sulfate composite phase-change material and a preparation method thereof, belonging to the field of phase-change materials. Background technique [0002] Phase change material (PCM-Phase Change Material) refers to a substance that changes the state of matter and provides latent heat as the temperature changes. The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time. Once this material is widely used in human life, it will become the best green carrier for energy conservation and environmental protection, and it has been listed as a national research and development utilization sequence in our country. The existing hydrated sulfate phase change materials have the disadvantages of narrow phase change temperature range and weak temperature sensitivity. Contents of the invention [0003] Purpose of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张叶龙丁玉龙贾亦轩赵伟杰陆民刚
Owner 江苏金合能源科技有限公司
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