Eutectic composite phase change material and preparation method thereof

By using composite phase change materials prepared by long-chain fatty acids, long-chain alcohols and saturated fatty acids, the problems of poor thermal conductivity and untimely adjustment response of phase change materials in the prior art are solved, and excellent thermal storage, heat release and temperature regulation capabilities are achieved suitable for the construction field.

CN120059681APending Publication Date: 2025-05-30XIJING UNIV
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Patent Information

Application Number
CN202510259214.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2025-01-02
Filing Date
2025-03-06
Publication Date
2025-05-30

AI Technical Summary

Technical Problem

The existing phase change materials on the walls of building have problems such as poor thermal conductivity, untimely temperature adjustment response, limited phase change temperature range, performance decline during long-term use, and unenvironmental protection, making it difficult to effectively apply to the energy storage building field.

Method used

The composite phase change material prepared by using long-chain fatty acids, long-chain alcohols and saturated fatty acids as raw materials, especially lauric acid, octadecanol and palmitic acid, reacts with saturated fatty acids through the reaction of binary eutectic mixtures, has excellent heat storage and heat transfer ability and temperature regulation ability.

Benefits of technology

The phase transition temperature is achieved between 27~28℃, the phase transition peak temperature is between 32~33℃ and the latent heat of phase transition is 189~190℃. It is suitable for the construction field, has good heat storage performance and temperature regulation capabilities, and the preparation method is simple.

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Abstract

The invention discloses a eutectic composite phase change material and a preparation method thereof, the composite phase change material takes long-chain fatty acid, long-chain alcohol and saturated fatty acid as raw materials, and the obtained composite phase change material shows excellent heat storage and release capability and temperature regulation capability.
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Claims

1. A low eutectic composite phase change material, characterized in that: The composite phase change material uses long-chain fatty acids, long-chain alcohols and saturated fatty acids as raw materials.

2. The composite phase change material according to claim 1, characterized in that: Preferably, the mass of the long-chain fatty acids is 50-55 wt % of the total amount of the long-chain fatty acids, long-chain alcohols and saturated fatty acids.

3. The composite phase change material according to claim 2, characterized in that: The mass of long-chain alcohols is 32~36 wt%.

4. The composite phase change material according to claim 1, characterized in that: The long-chain fatty acid is selected from one of lauric acid, stearic acid, oleic acid and linoleic acid.

5. The composite phase change material according to claim 1, characterized in that: The long-chain alcohol is selected from one of octadecyl alcohol, lauryl alcohol and hexadecanol.

6. The composite phase change material according to claim 1, characterized in that: The saturated fatty acid is selected from one of palmitic acid, palmitoleic acid and arachidic acid.

7. The composite phase change material according to claim 1, characterized in that: The phase change temperature of the composite phase change material is 27-28°C.

8. The composite phase change material according to claim 1, characterized in that: The phase change peak temperature of the composite phase change material is 32-33°C.

9. The composite phase change material according to claim 1, characterized in that: The phase change latent heat of the composite phase change material is 189-190°C.

10. A method for preparing the composite phase change material according to any one of claims 1 to 9, characterized in that: The method comprises: Step 1, using long-chain fatty acids and long-chain alcohols as raw materials to prepare a binary eutectic mixture; Step 2: reacting the binary eutectic mixture with saturated fatty acid to obtain the composite phase change material.

Citation Information

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