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Palmitic acid/expanded graphite/carbon fiber composite phase-change material and preparation method thereof

A composite phase change material and expanded graphite technology, applied in the field of palmitic acid/expanded graphite/carbon fiber composite phase change material and its preparation, can solve the problem of low thermal conductivity of the composite phase change material, no palmitic acid/expanded graphite/carbon fiber composite Literature reports and applications of phase change materials and their preparation methods, to achieve the effects of low cost, uniform adsorption effect, and improved shaping effect

Inactive Publication Date: 2019-03-12
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After literature search, research and analysis of the prior art, it is found that there are two main methods to improve the thermal conductivity of composite phase change materials: one is to directly fill the phase change material into expanded graphite; the other is to use particles with high thermal conductivity Dispersed into the phase change material, but both metho

Method used

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  • Palmitic acid/expanded graphite/carbon fiber composite phase-change material and preparation method thereof
  • Palmitic acid/expanded graphite/carbon fiber composite phase-change material and preparation method thereof

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Embodiment 1

[0021] The preparation method of the palmitic acid / expanded graphite / carbon fiber composite phase change material of embodiment 1 may further comprise the steps:

[0022] 1) Preparation of palmitic acid powder: put palmitic acid in a mortar for grinding, and grind it into 200-250 mesh palmitic acid powder;

[0023] 2) Put the expandable graphite in a constant temperature drying oven at a drying temperature of 100°C for 12 hours; take the dried expandable graphite in a beaker and move it to a microwave oven with a microwave power of 500W and a microwave temperature of 60°C for 40~ 50s, obtain expanded graphite;

[0024] 3) The particle size of carbon fiber powder is 100-150 μm;

[0025] 4) Prepare materials according to 70g of palmitic acid powder, 10g of expanded graphite and 20g of carbon fiber powder;

[0026] 5) According to step 4) mass parts of palmitic acid powder, expanded graphite and carbon fiber powder, first pour the palmitic acid powder into a beaker filled with ...

Embodiment 2

[0030] Embodiment 2 is basically the same as Embodiment 1, the difference lies in the selection of materials, 75g of palmitic acid powder, 10g of expanded graphite, and 15g of carbon fiber powder.

Embodiment 3

[0031] Embodiment 3 is basically the same as Embodiment 1, except that the selection of materials is 80 g of palmitic acid, 10 g of expanded graphite, and 10 g of carbon fiber powder.

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Abstract

The invention relates to the technical field of organic composite phase-change materials, and particularly discloses a palmitic acid/expanded graphite/carbon fiber composite phase-change material anda preparation method thereof. The method is characterized by comprising the following steps of preparing materials according to a ratio (in parts by mass) of palmitic acid powder to expanded graphiteto carbon fiber powder being (70 to 90) to 10 to (5 to 20); with the palmitic acid powder, the expanded graphite and the carbon fiber powder in the mass parts, firstly, pouring the palmitic acid powder into a beaker loaded with the expanded graphite, putting in a constant-temperature water-bath kettle, keeping a constant temperature of 70 DEG C, mixing and agitating for 15 min, melting the palmitic acid powder in the beaker and further completely mixing with the expanded graphite to obtain a mixture; next, pouring the carbon fiber powder into the mixture, and continuously heating and agitatingfor 1 h at the constant temperature; and taking out the beaker, and naturally cooling at a room temperature, so as to obtain the palmitic acid/expanded graphite/carbon fiber composite phase-change material. The prepared composite phase-change material has better heat stability, chemical stability and a higher heat storage property, as well as a better application prospect in the field of medium-and low-temperature heat storage.

Description

technical field [0001] The invention relates to the technical field of heat storage materials, and is an organic composite phase change material and a preparation method thereof, more specifically, a palmitic acid / expanded graphite / carbon fiber composite phase change material and a preparation method thereof. Background technique [0002] Phase change materials are the core of phase change heat storage. Organic phase change materials include paraffin, fatty acids and polyols, etc., which have high energy storage density and good chemical stability. There is almost no supercooling and phase separation during the phase change process. It is non-toxic and non-corrosive, but has the disadvantage of low thermal conductivity. As an organic phase change material, palmitic acid has a melting temperature of about 62 °C and good thermal stability, but it also has the disadvantage of low thermal conductivity, which limits the application of palmitic acid as a phase change heat storage ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 高龙孙学庚刘钟泽孙佰仲车德勇李少华靳宇宙
Owner NORTHEAST DIANLI UNIVERSITY