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Binary organic/inorganic nano-composite phase change energy storage material and preparation method thereof

An inorganic nano-composite phase transition technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of large thermal transformation and reversible solid-solid transformation, low energy storage density, poor durability, etc. Effects of cycle stability and thermal conductivity, high energy storage density, and low manufacturing cost

Inactive Publication Date: 2015-01-21
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the advantages of the binary fatty acid phase change material system are high phase change enthalpy, repeated melting and condensation, and a small degree of supercooling, but the disadvantage of this type of material is that it is expensive
Although the glycol phase change material system has a suitable phase transition temperature, it has the disadvantages of relatively large thermal transition and reversible solid-solid transition.
Judging from the relevant reports published so far, the existing phase change energy storage composite materials have disadvantages such as low energy storage density, poor durability, and high carrier cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 15 g of lauric acid and 20 g of lauryl alcohol, dissolve in 65 g of absolute ethanol, stir for 20 minutes while maintaining a molten state at 50° C., suction filtration, and air dry naturally to obtain a molten blend of lauric acid / lauryl alcohol.

[0025] Add 10g of montmorillonite to 80ml of distilled water, add 10g of 5% NaCl solution, stir for 2 hours in a constant temperature water bath at 50°C, let stand for precipitation for 10 hours, discard the supernatant, dry, grind and sieve to obtain inorganic modified montmorillonite Off the stone.

[0026] Take 15g of inorganic modified montmorillonite, mix it with 20g of triethanolamine, add 65ml of distilled water, adjust the pH to 6.5, react at 50℃ for 4 hours, filter with suction, wash with distilled water three times, air dry, crush and sieve, vacuum It is dried to constant weight at 65°C in a drying box to obtain modified montmorillonite.

[0027] Dissolve 15g of modified montmorillonite in 75ml of distilled water, a...

Embodiment 2

[0030] Mix 20 g of lauric acid and 25 g of lauryl alcohol, dissolve in 55 g of absolute ethanol, stir for 25 minutes while maintaining a molten state at 55° C., filter with suction, and air dry naturally to obtain a molten blend of lauric acid / lauryl alcohol.

[0031] Add 15g of montmorillonite into 70ml of distilled water, add 15g of 5% NaCl solution, and stir for 2.5 hours in a constant temperature water bath at 55°C, and let stand for 11 hours for precipitation. Discard the supernatant, dry, grind and sieve to obtain inorganic modified montmorillonite. Off the stone.

[0032] Take 15g of inorganic modified montmorillonite, mix with 25g of triethanolamine, add 60ml of distilled water, adjust pH to 7, react at 55℃ for 5 hours, filter with suction, wash with distilled water three times, air dry, crush and sieve, vacuum Dry to constant weight at 70°C in a drying box to obtain modified montmorillonite.

[0033] Dissolve 20g of modified montmorillonite in 65ml of distilled water, add 1...

Embodiment 3

[0036] Mix 25 g of lauric acid and 30 g of lauryl alcohol, dissolve in 45 g of absolute ethanol, stir for 30 minutes while maintaining a molten state at 60° C., filter with suction, and air dry to obtain a molten blend of lauric acid / lauryl alcohol.

[0037] Add 20g of montmorillonite to 60ml of distilled water, add 20g of 5% NaCl solution, stir for 3 hours in a constant temperature water bath at 60°C, let stand for 12 hours, discard the supernatant, dry, grind and sieve to obtain inorganic modified montmorillonite Off the stone.

[0038] Take 25g of inorganic modified montmorillonite, mix it with 30g of triethanolamine, add 45ml of distilled water, adjust the pH to 7.5, react at 60°C for 6 hours, filter with suction, wash with distilled water three times, air dry, crush and sieve, and vacuum Dry to constant weight at 75°C in a drying box to obtain modified montmorillonite.

[0039] Dissolve 25g of modified montmorillonite in 55ml of distilled water, add 20g of lauric acid / lauryl al...

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Abstract

The invention discloses a binary organic / inorganic nano-composite phase change energy storage material and a preparation method thereof. The material is prepared by mixing lauric acid / lauryl alcohol fusion mixture and modified montmorillonite, wherein the weight of the modified montmorillonite is 1-1.8 times that of the lauric acid / lauryl alcohol fusion mixture. The preparation method of the material comprises the following steps: fusing lauric acid and lauryl alcohol in anhydrous ethanol, and drying to obtain a fusing mixture; mixing the fusing mixture with a NaCl solution and triethanolamine modified montmorillonite in water; and mixing, distilling and drying to obtain the binary organic / inorganic nano-composite phase change energy storage material. The composite phase change energy storage material has the advantages of proper phase change temperature, high energy storage density, good stability, low manufacture cost and strong practicality, and can be applied to building energy conservation and other fields.

Description

Technical field [0001] The invention relates to a phase change energy storage material, in particular to an organic-inorganic composite phase change energy storage material. The invention also relates to a preparation method of the phase change energy storage material. Background technique [0002] Phase change materials (phase change materials) are substances that can change from one state to another at a certain temperature. When the state changes, the material molecules rapidly change from order to disorder or from disorder to order. The transformation is accompanied by endothermic or exothermic phenomena. Using the characteristics of phase change materials, it can be used to adjust temperature, alleviate the mismatch of energy supply and demand in time, place and intensity. It has a wide range of applications in solar energy utilization, building energy saving, waste heat recovery, aerospace and other fields. prospect. [0003] Phase change materials can be divided into inor...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王月祥王执乾白翰林
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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