Phase change graphite powder with phase change energy storage function and preparation method thereof

A technology of phase change energy storage and graphite powder, which is applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems of low thermal conductivity, inability to fully utilize the energy storage capacity of phase change materials, and low heat release power

Inactive Publication Date: 2011-04-27
张东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The low thermal conductivity leads to low energy storage and heat release power of phase change materials, and the energy storage capacity of phase change materials cannot be fully utilized, thus limiting its large-scale industrial application

Method used

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  • Phase change graphite powder with phase change energy storage function and preparation method thereof
  • Phase change graphite powder with phase change energy storage function and preparation method thereof
  • Phase change graphite powder with phase change energy storage function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] Take 100 grams of flake graphite (100 mesh, 95% carbon content), 500 milliliters of concentrated sulfuric acid (98%) and 50 grams of potassium permanganate, mix them, and place them in a constant temperature water bath with a temperature of 60°C. The time is 60 minutes. After the intercalation, the mixture was filtered with a 300-mesh stainless steel filter, and washed with water, and the filtration and washing process was repeated twice, and the pH value of the water washing was 6. Finally, the filter is put into an oven for drying. The drying temperature is 110°C, and the drying time is 12 hours. Take 100 grams of the baked graphite intercalation material and put it into a high-power microwave oven for expansion. The power of the microwave oven is set to above 3000W. The microwave action time is 3 seconds. Using atmospheric pressure impregnation method, the expanded graphite is soaked in calcium chloride saturated aqueous solution for 30 hours. Remove and drain. ...

Embodiment 2

[0030] Take 100 grams of flake graphite (100 mesh, 95% carbon content), 600 milliliters of concentrated sulfuric acid (98%) and 60 grams of potassium permanganate, mix them, and place them in a constant temperature water bath with a temperature of 70 ° C. The time is 60 minutes. After the intercalation, the mixture was filtered with a 300-mesh stainless steel filter, and washed with water. The filtration and washing process was repeated twice, and the pH value of the water washing was 7. Finally, the filter is put into an oven for drying. The drying temperature is 110°C, and the drying time is 12 hours. Take 100 grams of the baked graphite intercalation material and put it into a high-power microwave oven for expansion. The power of the microwave oven is set to above 4000W. The microwave action time is 2 seconds. Using the vacuum negative pressure impregnation method, impregnate the saturated aqueous solution of sodium nitrate and calcium nitrate in the expanded graphite, ...

Embodiment 3

[0032]Take 100 grams of flake graphite (100 mesh, 95% carbon content), 1000 milliliters of concentrated sulfuric acid (98%) and 100 grams of potassium permanganate, mix them, and place them in a constant temperature water bath with a temperature of 75°C. The time is 60 minutes. After the intercalation, the mixture was filtered with a 300-mesh stainless steel filter, and washed with water. The filtration and washing process was repeated twice, and the pH value of the water washing was 7. Finally, the filter is put into an oven for drying. The drying temperature is 110°C, and the drying time is 12 hours. Take 100 grams of the baked graphite intercalation material and put it into a high-power microwave oven for expansion. The power of the microwave oven is set to above 5000W. The microwave action time is 2 seconds. Using the vacuum negative pressure impregnation method, impregnate the saturated sodium acetate aqueous solution in the expanded graphite, maintain the vacuum for ...

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Abstract

The invention belongs to the technical field of composite materials with thermal functions, and in particular relates to a phase change graphite powder with a phase change energy storage function and a preparation method thereof. The phase change graphite powder is made of graphite and an inorganic salt phase change material and is prepared by the steps of graphite intercalation, puffing, dipping, evaporating, smashing and cladding, wherein the inorganic slat phase change material is distributed in graphite pores; and the inorganic salt phase change material is inorganic salt hydrate or a high-temperature inorganic salt phase change material. The phase change graphite powder prepared by the invention has the advantages of high heat-conducting property, favorable sealing property, not easy leakage and the like, and can be conveniently applied to various occasions, such as producing building materials and manufacturing high-temperature heat storage devices, electronic heat radiators and the like, thereby being widely used.

Description

technical field [0001] The invention belongs to the technical field of thermal functional composite materials, and in particular relates to a phase-change graphite powder with a phase-change energy storage function and a preparation method thereof. Background technique [0002] As the world population continues to increase, energy shortages have come ahead of schedule. The sustainable development of energy is a major problem in today's world. Phase change energy storage is a very important energy-saving technology. It uses the phase change latent heat of phase change materials to realize energy storage and utilization, which helps to improve energy efficiency and develop renewable energy. A very active frontier research direction in the field of science. Phase change energy storage temperature control is often used as an effective way to alleviate the mismatch between energy supply and demand in terms of time, intensity and location. It has broad application prospects in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 张东
Owner 张东
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