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Heat conduction enhanced inorganic PCM (phase change material) and preparation method thereof

An inorganic phase change material and a technology for enhancing thermal conductivity. It is used in heat exchange materials, chemical instruments and methods. It can solve the problems of low thermal conductivity and achieve the effects of high heat storage density, fast thermal response speed, and safe raw materials.

Inactive Publication Date: 2018-12-14
GUILIN QINGTONG NON FERROUS METAL ARTS & CRAFTS MATERIAL DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the technical problem of low thermal conductivity existing in the prior art, the present invention provides a heat conduction-enhanced organic phase change energy storage material and a preparation method thereof

Method used

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  • Heat conduction enhanced inorganic PCM (phase change material) and preparation method thereof
  • Heat conduction enhanced inorganic PCM (phase change material) and preparation method thereof
  • Heat conduction enhanced inorganic PCM (phase change material) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation method of heat conduction enhanced inorganic phase change energy storage material:

[0032] Step 1, the modification treatment of nano thermal conductivity enhancing particles, adding boron nitride to 60% sodium hydroxide solution, filtering in water bath at 90°C for 2 hours, and drying at 90°C for 20 hours;

[0033] Step 2, the preparation of the wall material prepolymer by adding the modified nano heat conduction enhancing particles, mixing the nano heat conduction enhancing particles with the monomer melamine and formaldehyde of the melamine resin, and ultrasonically forming the prepolymer;

[0034] Step 3, melting the inorganic phase change material, mixing the inorganic phase change material with a nucleating agent with a mass fraction of 1% and heating until the inorganic phase change material is completely melted;

[0035] Step 4, preparation of heat conduction-enhanced inorganic phase-change energy storage materials, adding the melted inorganic phase...

Embodiment 2

[0038] Preparation method of heat conduction enhanced inorganic phase change energy storage material:

[0039] The steps not specifically described are the same as in Example 1, the difference is that: Step 1, modification of nano thermal conductivity enhancing particles, 1.2 grams of carbon nanotubes are added to 50 mL of concentrated sulfuric acid, mixed with magnetic force for 30 minutes, ultrasonicated for 2 hours, and then added Mix 50mL of concentrated nitric acid with magnetic stirring for 30min, react at 130°C for 2h, cool, dilute, filter and dry.

[0040] The obtained thermal conductivity enhanced organic phase change energy storage material was determined by DSC experiment, and the results are as follows: figure 2 As shown, the latent heat of phase change is 137.9J / g.

Embodiment 3

[0042] Preparation method of heat conduction enhanced inorganic phase change energy storage material:

[0043] The steps not specifically described are the same as in Example 1, except that: Step 1, the modification treatment of nano thermal conductivity enhancing particles, adding 3 grams of natural graphite to a mixture of 20 grams of potassium permanganate, 350 mL of concentrated sulfuric acid and 50 mL of concentrated phosphoric acid The solution was reacted at 80°C for 10 h, cooled to room temperature, and then added 5 mL of 30% hydrogen peroxide until the solution turned light yellow, washed with hydrochloric acid and distilled water for 3 times, and then dried at 90°C.

[0044] The obtained thermal conductivity enhanced organic phase change energy storage material was determined by DSC experiment, and the results are as follows: image 3 As shown, the latent heat of phase change is 167.6J / g.

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Abstract

The invention discloses a heat conduction enhanced inorganic PCM (phase change material). The heat conduction enhanced inorganic PCM is prepared from an inorganic PCM as a core material and melamine resin containing heat conduction enhanced nano-particles as a wall material, wherein the heat conduction enhanced nano-particles are boron nitride, CNTs (carbon nano tubes) and graphene oxide that aremodified. A preparation method of the heat conduction enhanced inorganic PCM comprises the following steps: 1) modifying the heat conduction enhanced nano-particles; 2) preparing a prepolymer of the wall material added with the modified heat conduction enhanced nano-particles; 3) melting the inorganic PCM; and 4) preparing the heat conduction enhanced inorganic PCM. The heat conduction enhanced inorganic PCM has the advantages that 1) the heat response speed is high, i.e. the heat conduction property is high; 2) the heat accumulation density is high; 3) the heat cycling stability is high; and4) the technical characteristics that raw materials are safe and non-toxic and are not leaked easily are achieved. Therefore, the heat conduction enhanced inorganic PCM is better in heat conductivityand stability, the using ratio of energy sources is improved, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of phase-change materials in the field of organic polymer compound preparation or chemical processing technology, in particular to a heat conduction-enhanced inorganic phase-change energy storage material and a preparation method thereof. technical background [0002] With the development of economy and the advancement of science and technology, traditional energy is being consumed at an alarming rate, and human beings are facing unprecedented energy shortages. There are two basic ways to solve this problem: one is to develop renewable energy; the other is to improve energy efficiency. Therefore, energy storage is particularly important. Thermal energy storage systems offer possibilities for energy storage, and latent heat storage is the most efficient way to store thermal energy. Phase change material (Phase Change Material, PCM) is a material that uses the heat absorption and heat release characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 阳家盛
Owner GUILIN QINGTONG NON FERROUS METAL ARTS & CRAFTS MATERIAL DEV CO LTD
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