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A high thermal conductivity binary low eutectic hydrated salt phase change material and its preparation method

A phase change material and low eutectic technology, applied in the field of material chemistry, can solve the problems of cumbersome preparation process, high degree of supercooling, and complicated operation of phase change materials, and achieve improved thermal cycle stability, low price, and broad application prospects Effect

Active Publication Date: 2021-02-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high thermal conductivity binary low eutectic hydrated salt phase change material and its preparation method, in order to solve the existing thermal conductivity of the hydrated salt phase change material with a phase transition temperature of about 30°C during use The disadvantages of low, high degree of supercooling and phase separation, the preparation process of the phase change material is cumbersome and the operation is complicated

Method used

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  • A high thermal conductivity binary low eutectic hydrated salt phase change material and its preparation method
  • A high thermal conductivity binary low eutectic hydrated salt phase change material and its preparation method
  • A high thermal conductivity binary low eutectic hydrated salt phase change material and its preparation method

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specific Embodiment approach 1

[0027] Specific implementation mode one: combine figure 1 Describe this embodiment, in this embodiment, the high thermal conductivity binary low eutectic hydrated salt phase change material is composed of 23-26 parts by weight of Glauber's salt, 70-75 parts of disodium hydrogen phosphate dodecahydrate, 0.5- A solution composed of 1.5 parts of nucleating agent, 1-2.25 parts of surfactant, 3-4.5 parts of multifunctional modifier and 1-2.25 parts of stabilizer.

[0028] Glauber's salt is Na in the present invention 2 SO 4 10H 2 O, disodium hydrogen phosphate dodecahydrate is Na 2 HPO 4 12H 2 O.

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is a further limitation of Embodiment 1. In this embodiment, the weight-number ratio between Glauber's salt and disodium hydrogen phosphate dodecahydrate is 1:3. This ratio is the best ratio in parts by weight between Glauber's salt and disodium hydrogen phosphate dodecahydrate obtained through multiple sample tests.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 1 Describe this embodiment mode, this preparation method is carried out according to the following steps in this embodiment mode:

[0031] Step 1: Weigh 23-26 parts of Glauber's salt, 70-75 parts of disodium hydrogen phosphate dodecahydrate, 0.5-1.5 parts of nucleating agent, 1-2.25 parts of surfactant, 3- 4.5 parts of multifunctional modifier and 1-2.25 parts of stabilizer;

[0032] Step 2: Pour 23-26 parts of Glauber's salt and 70-75 parts of disodium hydrogen phosphate dodecahydrate into a container and mix, heat at 50-70°C until completely melted, then stir evenly to prepare a low eutectic hydration saline solution;

[0033] Step 3: Under the condition of stirring the eutectic hydrated salt solution, add 0.5-1.5 parts of nucleating agent and 1-2.25 parts of surfactant in sequence until the two are completely dissolved to form a preliminary modified solution;

[0034] Step 4: Add 3 to 4.5 parts of a multifunct...

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Abstract

A high thermal conductivity binary low eutectic hydrated salt phase change material and a preparation method thereof, which relate to an inorganic hydrated salt phase change material and a preparation method thereof. The existing hydrated salt phase change material with a phase change temperature of about 30°C has the disadvantages of low thermal conductivity, high degree of supercooling and phase separation during use. The preparation process of the phase change material is cumbersome and the operation is complicated. According to parts by weight, the present invention is composed of 23-26 parts of Glauber's salt, 70-75 parts of disodium hydrogen phosphate dodecahydrate, 0.5-1.5 parts of nucleating agent, 1-2.25 parts of surfactant, 3-4.5 parts A solution composed of a multifunctional modifier and 1-2.25 parts of a stabilizer. The preparation method in the present invention is to mix and dissolve Glauber's salt, disodium hydrogen phosphate dodecahydrate, nucleating agent, surfactant, multifunctional modifier and stabilizer one by one according to the ratio of parts by weight, and finally form a high thermal conductivity binary low Process of eutectic hydrated salt phase transition solutions. The invention is used in the technical field of material chemistry.

Description

technical field [0001] The invention relates to an inorganic phase change material and a preparation method thereof, belonging to the technical field of material chemistry. Background technique [0002] Phase change materials can absorb excess heat energy from the outside world during the phase transition process, and release the absorbed heat energy when the heat energy supply is needed from the outside world, thereby achieving the effect of adjusting the ambient temperature. In the fields of construction and agricultural greenhouses, high ambient temperature requirements result in excessive energy consumption. If phase change materials are used in agricultural greenhouses and buildings, due to their energy storage and energy release properties, they can not only reduce energy consumption and play a role in energy conservation, but also achieve the purpose of improving and controlling the greenhouse environment. [0003] In the field of construction and agricultural greenh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 刘雨时杨英姿高小建
Owner HARBIN INST OF TECH
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