Phase change thermal storage material used at medium temperature in industries and preparation method thereof

A phase change heat storage and medium temperature technology, which is applied in heat exchange materials, chemical industry, chemical instruments and methods, etc., can solve problems such as low thermal conductivity, and achieve the effects of improving bonding strength, low preparation cost and fast deposition rate.

Active Publication Date: 2014-06-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its thermal conductivity is small, and it is necessary to add a thermally conductive phase medium to improve its thermal conductivity in the application.

Method used

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  • Phase change thermal storage material used at medium temperature in industries and preparation method thereof
  • Phase change thermal storage material used at medium temperature in industries and preparation method thereof
  • Phase change thermal storage material used at medium temperature in industries and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Adipic acid is selected according to mass percentage: 90%, copper-coated carbon nanotubes 10%. Among them, adipic acid can be directly dried for 24 hours, while carbon nanotubes are firstly treated at 400°C for 30 minutes, then mixed with ethanol and then subjected to ultrasonic treatment for 40 minutes, and then copper-plated on the surface, and dried after copper-plating Copper-coated carbon nanotubes were obtained after 10 hours of treatment.

[0038] The process parameters during copper plating are as follows:

[0039]

[0040] Water bath temperature: 80±1℃

[0041] PH value: 12±0.1, adjusted with NaOH

[0042] Stirring method: magnetic stirring

[0043] Plating time: 0.5h.

[0044] figure 1 SEM image of copper-coated carbon nanotubes. From figure 1 It can be seen that the copper-plated layer on the surface of the carbon nanotubes is tightly attached to the surface of the carbon nanotubes.

[0045] Then, after adipic acid powder is ground through a 100-me...

Embodiment 2

[0048] Adipic acid is selected according to mass percentage: 92%, copper-coated carbon nanotubes 8%. Among them, adipic acid can be directly dried for 24 hours, while carbon nanotubes are first treated at 400 ° C for 30 minutes, then mixed with ethanol and then ultrasonically treated for 40 minutes, and then copper-plated on the surface (same as in Example 1) method), copper-coated carbon nanotubes were obtained after drying for 10 hours after copper plating.

[0049] The process parameters during copper plating are as follows:

[0050]

[0051] Water bath temperature: 80±1℃

[0052] PH value: 12±0.1, adjusted with NaOH

[0053] Stirring method: magnetic stirring

[0054] Plating time: 5h.

[0055] Then, after adipic acid powder is ground through a 100-mesh sieve, it is mechanically mixed with copper-coated carbon nanotubes for 15 minutes according to a predetermined ratio. under melt adsorption for 6 hours. During tablet molding, add 3% CMC binder. The melting endot...

Embodiment 3

[0057] Adipic acid is selected according to mass percentage: 94%, copper-coated carbon nanotubes 6%. Among them, adipic acid can be directly dried for 24 hours, while carbon nanotubes are firstly treated at 400°C for 30 minutes, then mixed with ethanol and then subjected to ultrasonic treatment for 40 minutes, and then copper-plated on the surface, and dried after copper-plating Copper-coated carbon nanotubes were obtained after 10 hours of treatment.

[0058] The process parameters during copper plating are as follows:

[0059]

[0060] Water bath temperature: 80±1℃

[0061] PH value: 12±0.1, adjusted with NaOH

[0062] Stirring method: magnetic stirring

[0063] Plating time: 3h.

[0064] Then, after adipic acid powder is ground through a 100-mesh sieve, it is mechanically mixed with copper-coated carbon nanotubes for 15 minutes according to a predetermined ratio. under melt adsorption for 6 hours. During tablet molding, add 3% CMC binder. The melting endothermic e...

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Abstract

The invention provides a phase change thermal storage material used at medium temperature in industries and a preparation method thereof. The phase change thermal storage material is prepared from adipic acid, a copper coated carbon nanotube and a binder, wherein the mass ratio of adipic acid to the copper coated carbon nanotube is (88-98):(2-12), and the mass of the binder is 3% of the total mass of adipic acid and the copper coated carbon nanotube. The preparation method of the phase change thermal storage material comprises the steps of mechanically mixing adipic acid with the copper coated carbon nanotube according to the preset ratio, filling the mixture into a crucible after mixing adipic acid with the copper coated carbon nanotube uniformly, putting the mixture into a vacuum drying oven to undergo vacuum melting and adsorption, then doping the binder and carrying out press forming, thus obtaining the phase change thermal storage material. The thermal storage material can be applied to dewatering and drying in the industries such as solar air conditioners, floor heating, chemical printing and dyeing and the like. The preparation method is reasonable in material selection and advanced in preparation process, thus the thermal storage material used in the industrial field can be produced at low cost. The thermal storage composite material substantially improves the comprehensive properties including thermal storage, heat release efficiency and the like.

Description

technical field [0001] The present invention relates to the preparation of phase-change thermal storage materials for medium-temperature field, and in particular provides an industrial medium-temperature phase-change thermal storage material with adipic acid as the phase-change thermal storage material and carbon nanotubes as the heat conduction enhancement phase and its preparation method. The working temperature of the phase change heat storage material prepared by the method can be 120-200°C. Background technique [0002] In industrial applications, renewable energy represented by solar energy has the advantages of abundant reserves and environmental friendliness, and insisting on promoting its development and utilization is of great significance to the sustainable development of human society. However, the utilization of thermal energy has disadvantages such as time discontinuity, spatial difference, and intensity instability, which greatly limit its large-scale applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCY02P20/10
Inventor 周卫兵朱教群程晓敏李元元原郭丰杨宪杰唐文学韩庆浩
Owner WUHAN UNIV OF TECH
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