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Preparation method of novel decanoic acid-palmitic acid/expanded graphite composite phase change energy storage material

A technology of expanded graphite and composite phase change, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as unsatisfactory engineering needs, high phase change temperature, and poor thermal conductivity, so as to improve energy utilization efficiency and reduce Phase transition temperature, effect of improving thermal conductivity

Inactive Publication Date: 2018-12-21
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the deficiencies in the prior art, the object of the present invention is to provide a kind of preparation method of capric acid-palmitic acid / expanded graphite novel composite phase change energy storage material, and this method aims at solving the problem that the phase change temperature of existing phase change material is higher, Poor thermal conductivity, easy to leak, unable to meet the technical problems of actual engineering needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This specific embodiment is to prepare capric acid-palmitic acid / expanded graphite new composite phase change energy storage material, and the specific steps are:

[0028] Step 1. According to the mass ratio of 6:1, weigh capric acid and palmitic acid respectively and place them in a reaction vessel, and heat the reaction vessel at 76°C to make all capric acid and palmitic acid in the reaction vessel Melt, and carry out magnetic stirring, the rotating speed of magnetic stirring is 200r / min, the temperature is 76°C, and the stirring time is 0.6h, so that capric acid and palmitic acid are fully mixed evenly, and then cooled to room temperature to obtain capric acid- Palmitic dibasic fatty acid eutectic mixture;

[0029]Step 2. Take the expandable graphite and dry it at 76°C for 26 hours, then put the dried expandable graphite into a microwave oven for microwave treatment. The microwave treatment power is 600W, and the treatment time is 42s to obtain expanded graphite;

...

Embodiment 2

[0032] This specific embodiment is to prepare capric acid-palmitic acid / expanded graphite new composite phase change energy storage material, and the specific steps are:

[0033] Step 1. According to the mass ratio of 86:14, weigh capric acid and palmitic acid respectively and place them in the reaction container, and heat the reaction container at 80°C to make all the capric acid and palmitic acid in the reaction container Melt, and carry out magnetic stirring, the rotating speed of magnetic stirring is 300r / min, the temperature is 80°C, and the stirring time is 0.5h, so that capric acid and palmitic acid are fully mixed evenly, and then cooled to room temperature to obtain capric acid- Palmitic dibasic fatty acid eutectic mixture;

[0034] Step 2. Take the expandable graphite and dry it at 80°C for 24 hours, then put the dried expandable graphite into a microwave oven for microwave treatment. The power of the microwave treatment is 700W, and the treatment time is 40.s to obt...

Embodiment 3

[0037] This specific embodiment is to prepare capric acid-palmitic acid / expanded graphite new composite phase change energy storage material, and the specific steps are:

[0038] Step 1. According to the mass ratio of 6.4:1, weigh capric acid and palmitic acid respectively and place them in a reaction vessel, and heat the reaction vessel at 82°C to make all capric acid and palmitic acid in the reaction vessel Melt, and carry out magnetic stirring, the rotating speed of magnetic stirring is 400r / min, the temperature is 82°C, and the stirring time is 0.4h, so that capric acid and palmitic acid are fully mixed evenly, and then cooled to room temperature to obtain capric acid- Palmitic dibasic fatty acid eutectic mixture;

[0039] Step 2: Take the expandable graphite and dry it at 82°C for 22 hours, then put the dried expandable graphite into a microwave oven for microwave treatment, the microwave treatment power is 800W, and the treatment time is 38s to obtain expanded graphite; ...

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Abstract

The invention discloses a preparation method of a novel decanoic acid-palmitic acid / expanded graphite composite phase change energy storage material. The method aims to solve the technical problems that existing phase change materials are higher in phase change temperature, poor in heat conductivity and easy to leak and cannot meet actual engineering requirements. The method comprises the specificsteps as follows: decanoic acid and palmitic acid are heated to be molten and mixed, and a decanoic acid-palmitic acid binary fatty acid eutectic mixture is obtained; expansible graphite is taken, dried and then subjected to microwave treatment, and expanded graphite is obtained; the expanded graphite and the decanoic acid-palmitic acid binary fatty acid eutectic mixture are heated and stirred regularly, so that the decanoic acid-palmitic acid binary fatty acid eutectic mixture is uniformly adsorbed in pores of expanded graphite, and the decanoic acid-palmitic acid / expanded graphite composite phase change material is obtained. The decanoic acid-palmitic acid / expanded graphite composite phase change energy storage material obtained with the method is significant in phase change energy storage capacity and heat conducting property, good in thermal stability, not easy to leak and applicable to the energy saving field of buildings.

Description

technical field [0001] The invention belongs to the field of building energy saving and phase change energy storage materials, and specifically relates to a preparation method of a novel composite phase change energy storage material with expanded graphite as a supporting frame and capric acid-palmitic acid as a phase change material. Background technique [0002] Nowadays, with the rapid consumption of fossil fuel resources and the continuous increase in global energy demand, energy and environmental issues have become more and more prominent, and have become a huge threat and challenge facing mankind. Therefore, it is necessary to find an effective way to reduce reliance on fossil fuels while meeting growing global energy demands. At present, researchers have focused their attention on the inexhaustible, pollution-free, environmentally friendly and clean solar energy. However, solar energy has the characteristics of intermittent and unstable, which has caused solar energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 费华顾庆军王林雅蒋达华方敏李元林罗凯孙伟张智霖
Owner JIANGXI UNIV OF SCI & TECH
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