Cetylamine/ silicon dioxide composite phase-change energy storing material and preparation method thereof

A silica and composite phase change technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of polymer material rupture and low thermal conductivity, and achieve high phase change enthalpy and coating amount. And the effect of improved dispersion and good encapsulation effect

Active Publication Date: 2018-11-06
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite materials prepared by the above methods all use polymer materials as the matrix, which has the disadvantage of low thermal conductivity. At the same time, when the phase change material undergoes a solid-liquid phase transition, due to the volume change, the polymer material will be damaged during long-term operation. the rupture

Method used

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  • Cetylamine/ silicon dioxide composite phase-change energy storing material and preparation method thereof
  • Cetylamine/ silicon dioxide composite phase-change energy storing material and preparation method thereof
  • Cetylamine/ silicon dioxide composite phase-change energy storing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Measure 80 milliliters of isopropanol (IPA) in a 100 milliliter beaker, weigh 7 grams (29.0 mmol) hexadecylamine (HDA) and join in the isopropanol solvent, at a temperature of 50 ° C, a rotation speed of Stir uniformly for 15 minutes under the condition of 500r / min to form a uniform colorless and transparent mixed solution.

[0042] (2) Take 1 milliliter (4.5 mmol) tetraethyl orthosilicate (TEOS) and add it to the above-mentioned homogeneous colorless and transparent mixed solution. The measured pH value is 7. Stirring was continued for 30 minutes under the same conditions to obtain a mixed solution.

[0043] (3) Measure 10 ml of deionized water (H 2 O) Slowly add 1 drop / second (using a 5mL disposable plastic dropper) dropwise to the mixed solution obtained in the above step (2), and continue to stir evenly at a temperature of 50°C and a rotation speed of 500r / min After 24 hours, it was dried in a drying oven at a temperature of 50° C. for 24 hours to obtain the f...

Embodiment 2

[0069] (1) Measure 60 milliliters of isopropanol (IPA) in a 100 milliliter beaker, weigh 5 grams (20.7 mmol) of hexadecylamine (HDA) and add it to the isopropanol solvent at a temperature of 80 ° C and a speed of Stir evenly for 30 minutes under the condition of 750r / min to form a uniform colorless and transparent mixed solution.

[0070](2) Take 1 milliliter (4.5 mmol) tetraethyl orthosilicate (TEOS) and add it to the above-mentioned homogeneous colorless and transparent mixed solution, add hydrochloric acid with a concentration of 12 mol / L to adjust the pH value to 7, and then , under the condition of rotating speed of 750r / min, continue to stir uniformly for 30 minutes to obtain a mixed solution.

[0071] (3) Measure 15 ml of deionized water (H 2 O) Slowly add 1 drop / second (with a 5mL disposable plastic dropper) dropwise to the mixed solution obtained in the above step (2), and continue to stir evenly at a temperature of 80°C and a rotation speed of 750r / min After 5 hour...

Embodiment 3

[0074] (1) Measure 40 milliliters of isopropanol (IPA) in a 100 milliliter beaker, weigh 9 grams (37.3 mmol) of hexadecylamine (HDA) and add it to the isopropanol solvent at a temperature of 65° C. Stir evenly for 30 minutes under the condition of 750r / min to form a uniform colorless and transparent mixed solution.

[0075] (2) Measure 1 milliliter (4.5 mmol) tetraethyl orthosilicate (TEOS) and join in the above-mentioned homogeneous colorless and transparent mixed solution, add ammonia water (mass percentage is 28%) to adjust the pH value to 10, then at a temperature of 65 ℃, under the condition of rotating speed of 750r / min, continue to stir evenly for 30 minutes to obtain a mixed solution.

[0076] (3) Measure 20 ml of deionized water (H 2 O) Slowly add 1 drop / second (with a 5mL disposable plastic dropper) dropwise to the mixed solution obtained in the above step (2), and continue to stir evenly at a temperature of 65°C and a rotation speed of 750r / min After 24 hours, it ...

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Abstract

The invention discloses a cetylamine / silicon dioxide composite phase-change energy storing material and a preparation method thereof. The method comprises the following steps: dissolving cetylamine in isopropanol; dispersing a silicone source in the mixture; and slowly adding deionized water to obtain the product. The method is simple in processes, and the product can be formed without any surfactant; the prepared cetylamine / silicon dioxide composite phase-change energy storing material is a novel composite phase-change energy storing material, is high in enthalpy of phase change, high in sealing effect and heat conducting capacity, and simple in product conveying; and the problem of liquid phase leaking in use of the material can be effectively solved.

Description

technical field [0001] The invention belongs to the field of phase-change energy storage materials, and in particular relates to cetylamine / silicon dioxide composite phase-change energy storage materials and a preparation method thereof. Background technique [0002] In the past few decades, with the acceleration of industrial development, people's demand for energy has increased sharply, which has exacerbated the deterioration of the ecological environment. Under the increasingly serious energy crisis and environmental pollution, the energy saving and environmental protection of materials are particularly important. Important, so thermal energy storage has received more and more attention. Latent heat storage is one of the most efficient methods of thermal energy storage. Latent heat storage means that a material absorbs or releases a large amount of heat through the melting or solidification process, and realizes the storage and release of heat, that is, the material can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
CPCC09K5/02
Inventor 翟兰兰王瑞芳李炳蒙邹超刘若望兰云军柴玉叶
Owner WENZHOU UNIVERSITY
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